GitHub/LineageOS/G12/android_kernel_amlogic_linux-4.9.git
5 years agobrcmfmac: add subtype check for event handling in data path
Arend van Spriel [Thu, 14 Feb 2019 12:43:48 +0000 (13:43 +0100)]
brcmfmac: add subtype check for event handling in data path

commit a4176ec356c73a46c07c181c6d04039fafa34a9f upstream.

For USB there is no separate channel being used to pass events
from firmware to the host driver and as such are passed over the
data path. In order to detect mock event messages an additional
check is needed on event subtype. This check is added conditionally
using unlikely() keyword.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agobrcmfmac: assure SSID length from firmware is limited
Arend van Spriel [Thu, 14 Feb 2019 12:43:47 +0000 (13:43 +0100)]
brcmfmac: assure SSID length from firmware is limited

commit 1b5e2423164b3670e8bc9174e4762d297990deff upstream.

The SSID length as received from firmware should not exceed
IEEE80211_MAX_SSID_LEN as that would result in heap overflow.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 4.9: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agobrcmfmac: add length checks in scheduled scan result handler
Arend Van Spriel [Thu, 6 Apr 2017 12:14:40 +0000 (13:14 +0100)]
brcmfmac: add length checks in scheduled scan result handler

commit 4835f37e3bafc138f8bfa3cbed2920dd56fed283 upstream.

Assure the event data buffer is long enough to hold the array
of netinfo items and that SSID length does not exceed the maximum
of 32 characters as per 802.11 spec.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 4.9:
 - Move the assignment to "data" along with the assignment to "netinfo_start"
   that depends on it
 - Adjust context, indentation]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/vmwgfx: Don't send drm sysfs hotplug events on initial master set
Thomas Hellstrom [Tue, 7 May 2019 09:07:53 +0000 (11:07 +0200)]
drm/vmwgfx: Don't send drm sysfs hotplug events on initial master set

commit 63cb44441826e842b7285575b96db631cc9f2505 upstream.

This may confuse user-space clients like plymouth that opens a drm
file descriptor as a result of a hotplug event and then generates a
new event...

Cc: <stable@vger.kernel.org>
Fixes: 5ea1734827bb ("drm/vmwgfx: Send a hotplug event at master_set")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agogcc-plugins: Fix build failures under Darwin host
Kees Cook [Mon, 20 May 2019 18:50:42 +0000 (11:50 -0700)]
gcc-plugins: Fix build failures under Darwin host

commit 7210e060155b9cf557fb13128353c3e494fa5ed3 upstream.

The gcc-common.h file did not take into account certain macros that
might have already been defined in the build environment. This updates
the header to avoid redefining the macros, as seen on a Darwin host
using gcc 4.9.2:

 HOSTCXX -fPIC scripts/gcc-plugins/arm_ssp_per_task_plugin.o - due to: scripts/gcc-plugins/gcc-common.h
In file included from scripts/gcc-plugins/arm_ssp_per_task_plugin.c:3:0:
scripts/gcc-plugins/gcc-common.h:153:0: warning: "__unused" redefined
^
In file included from /usr/include/stdio.h:64:0,
                from /Users/hns/Documents/Projects/QuantumSTEP/System/Library/Frameworks/System.framework/Versions-jessie/x86_64-apple-darwin15.0.0/gcc/arm-linux-gnueabi/bin/../lib/gcc/arm-linux-gnueabi/4.9.2/plugin/include/system.h:40,
                from /Users/hns/Documents/Projects/QuantumSTEP/System/Library/Frameworks/System.framework/Versions-jessie/x86_64-apple-darwin15.0.0/gcc/arm-linux-gnueabi/bin/../lib/gcc/arm-linux-gnueabi/4.9.2/plugin/include/gcc-plugin.h:28,
                from /Users/hns/Documents/Projects/QuantumSTEP/System/Library/Frameworks/System.framework/Versions-jessie/x86_64-apple-darwin15.0.0/gcc/arm-linux-gnueabi/bin/../lib/gcc/arm-linux-gnueabi/4.9.2/plugin/include/plugin.h:23,
                from scripts/gcc-plugins/gcc-common.h:9,
                from scripts/gcc-plugins/arm_ssp_per_task_plugin.c:3:
/usr/include/sys/cdefs.h:161:0: note: this is the location of the previous definition
^

Reported-and-tested-by: "H. Nikolaus Schaller" <hns@goldelico.com>
Fixes: 189af4657186 ("ARM: smp: add support for per-task stack canaries")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoCIFS: cifs_read_allocate_pages: don't iterate through whole page array on ENOMEM
Roberto Bergantinos Corpas [Tue, 28 May 2019 07:38:14 +0000 (09:38 +0200)]
CIFS: cifs_read_allocate_pages: don't iterate through whole page array on ENOMEM

commit 31fad7d41e73731f05b8053d17078638cf850fa6 upstream.

 In cifs_read_allocate_pages, in case of ENOMEM, we go through
whole rdata->pages array but we have failed the allocation before
nr_pages, therefore we may end up calling put_page with NULL
pointer, causing oops

Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agostaging: vc04_services: prevent integer overflow in create_pagelist()
Dan Carpenter [Wed, 15 May 2019 09:38:33 +0000 (12:38 +0300)]
staging: vc04_services: prevent integer overflow in create_pagelist()

commit ca641bae6da977d638458e78cd1487b6160a2718 upstream.

The create_pagelist() "count" parameter comes from the user in
vchiq_ioctl() and it could overflow.  If you look at how create_page()
is called in vchiq_prepare_bulk_data(), then the "size" variable is an
int so it doesn't make sense to allow negatives or larger than INT_MAX.

I don't know this code terribly well, but I believe that typical values
of "count" are typically quite low and I don't think this check will
affect normal valid uses at all.

The "pagelist_size" calculation can also overflow on 32 bit systems, but
not on 64 bit systems.  I have added an integer overflow check for that
as well.

The Raspberry PI doesn't offer the same level of memory protection that
x86 does so these sorts of bugs are probably not super critical to fix.

Fixes: 71bad7f08641 ("staging: add bcm2708 vchiq driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodocs: Fix conf.py for Sphinx 2.0
Jonathan Corbet [Wed, 22 May 2019 20:30:45 +0000 (14:30 -0600)]
docs: Fix conf.py for Sphinx 2.0

commit 3bc8088464712fdcb078eefb68837ccfcc413c88 upstream.

Our version check in Documentation/conf.py never envisioned a world where
Sphinx moved beyond 1.x.  Now that the unthinkable has happened, fix our
version check to handle higher version numbers correctly.

Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agokernel/signal.c: trace_signal_deliver when signal_group_exit
Zhenliang Wei [Sat, 1 Jun 2019 05:30:52 +0000 (22:30 -0700)]
kernel/signal.c: trace_signal_deliver when signal_group_exit

commit 98af37d624ed8c83f1953b1b6b2f6866011fc064 upstream.

In the fixes commit, removing SIGKILL from each thread signal mask and
executing "goto fatal" directly will skip the call to
"trace_signal_deliver".  At this point, the delivery tracking of the
SIGKILL signal will be inaccurate.

Therefore, we need to add trace_signal_deliver before "goto fatal" after
executing sigdelset.

Note: SEND_SIG_NOINFO matches the fact that SIGKILL doesn't have any info.

Link: http://lkml.kernel.org/r/20190425025812.91424-1-weizhenliang@huawei.com
Fixes: cf43a757fd4944 ("signal: Restore the stop PTRACE_EVENT_EXIT")
Signed-off-by: Zhenliang Wei <weizhenliang@huawei.com>
Reviewed-by: Christian Brauner <christian@brauner.io>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ivan Delalande <colona@arista.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomemcg: make it work on sparse non-0-node systems
Jiri Slaby [Sat, 1 Jun 2019 05:30:26 +0000 (22:30 -0700)]
memcg: make it work on sparse non-0-node systems

commit 3e8589963773a5c23e2f1fe4bcad0e9a90b7f471 upstream.

We have a single node system with node 0 disabled:
  Scanning NUMA topology in Northbridge 24
  Number of physical nodes 2
  Skipping disabled node 0
  Node 1 MemBase 0000000000000000 Limit 00000000fbff0000
  NODE_DATA(1) allocated [mem 0xfbfda000-0xfbfeffff]

This causes crashes in memcg when system boots:
  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  #PF error: [normal kernel read fault]
...
  RIP: 0010:list_lru_add+0x94/0x170
...
  Call Trace:
   d_lru_add+0x44/0x50
   dput.part.34+0xfc/0x110
   __fput+0x108/0x230
   task_work_run+0x9f/0xc0
   exit_to_usermode_loop+0xf5/0x100

It is reproducible as far as 4.12.  I did not try older kernels.  You have
to have a new enough systemd, e.g.  241 (the reason is unknown -- was not
investigated).  Cannot be reproduced with systemd 234.

The system crashes because the size of lru array is never updated in
memcg_update_all_list_lrus and the reads are past the zero-sized array,
causing dereferences of random memory.

The root cause are list_lru_memcg_aware checks in the list_lru code.  The
test in list_lru_memcg_aware is broken: it assumes node 0 is always
present, but it is not true on some systems as can be seen above.

So fix this by avoiding checks on node 0.  Remember the memcg-awareness by
a bool flag in struct list_lru.

Link: http://lkml.kernel.org/r/20190522091940.3615-1-jslaby@suse.cz
Fixes: 60d3fd32a7a9 ("list_lru: introduce per-memcg lists")
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotty: max310x: Fix external crystal register setup
Joe Burmeister [Mon, 13 May 2019 10:23:57 +0000 (11:23 +0100)]
tty: max310x: Fix external crystal register setup

commit 5d24f455c182d5116dd5db8e1dc501115ecc9c2c upstream.

The datasheet states:

  Bit 4: ClockEnSet the ClockEn bit high to enable an external clocking
(crystal or clock generator at XIN). Set the ClockEn bit to 0 to disable
clocking
  Bit 1: CrystalEnSet the CrystalEn bit high to enable the crystal
oscillator. When using an external clock source at XIN, CrystalEn must
be set low.

The bit 4, MAX310X_CLKSRC_EXTCLK_BIT, should be set and was not.

This was required to make the MAX3107 with an external crystal on our
board able to send or receive data.

Signed-off-by: Joe Burmeister <joe.burmeister@devtank.co.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotty: serial: msm_serial: Fix XON/XOFF
Jorge Ramirez-Ortiz [Mon, 20 May 2019 18:38:48 +0000 (20:38 +0200)]
tty: serial: msm_serial: Fix XON/XOFF

commit 61c0e37950b88bad590056286c1d766b1f167f4e upstream.

When the tty layer requests the uart to throttle, the current code
executing in msm_serial will trigger "Bad mode in Error Handler" and
generate an invalid stack frame in pstore before rebooting (that is if
pstore is indeed configured: otherwise the user shall just notice a
reboot with no further information dumped to the console).

This patch replaces the PIO byte accessor with the word accessor
already used in PIO mode.

Fixes: 68252424a7c7 ("tty: serial: msm: Support big-endian CPUs")
Cc: stable@vger.kernel.org
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agodrm/nouveau/i2c: Disable i2c bus access after ->fini()
Lyude Paul [Tue, 9 Apr 2019 20:23:30 +0000 (16:23 -0400)]
drm/nouveau/i2c: Disable i2c bus access after ->fini()

commit 342406e4fbba9a174125fbfe6aeac3d64ef90f76 upstream.

For a while, we've had the problem of i2c bus access not grabbing
a runtime PM ref when it's being used in userspace by i2c-dev, resulting
in nouveau spamming the kernel log with errors if anything attempts to
access the i2c bus while the GPU is in runtime suspend. An example:

[  130.078386] nouveau 0000:01:00.0: i2c: aux 000d: begin idle timeout ffffffff

Since the GPU is in runtime suspend, the MMIO region that the i2c bus is
on isn't accessible. On x86, the standard behavior for accessing an
unavailable MMIO region is to just return ~0.

Except, that turned out to be a lie. While computers with a clean
concious will return ~0 in this scenario, some machines will actually
completely hang a CPU on certian bad MMIO accesses. This was witnessed
with someone's Lenovo ThinkPad P50, where sensors-detect attempting to
access the i2c bus while the GPU was suspended would result in a CPU
hang:

  CPU: 5 PID: 12438 Comm: sensors-detect Not tainted 5.0.0-0.rc4.git3.1.fc30.x86_64 #1
  Hardware name: LENOVO 20EQS64N17/20EQS64N17, BIOS N1EET74W (1.47 ) 11/21/2017
  RIP: 0010:ioread32+0x2b/0x30
  Code: 81 ff ff ff 03 00 77 20 48 81 ff 00 00 01 00 76 05 0f b7 d7 ed c3
  48 c7 c6 e1 0c 36 96 e8 2d ff ff ff b8 ff ff ff ff c3 8b 07 <c3> 0f 1f
  40 00 49 89 f0 48 81 fe ff ff 03 00 76 04 40 88 3e c3 48
  RSP: 0018:ffffaac3c5007b48 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13
  RAX: 0000000001111000 RBX: 0000000001111000 RCX: 0000043017a97186
  RDX: 0000000000000aaa RSI: 0000000000000005 RDI: ffffaac3c400e4e4
  RBP: ffff9e6443902c00 R08: ffffaac3c400e4e4 R09: ffffaac3c5007be7
  R10: 0000000000000004 R11: 0000000000000001 R12: ffff9e6445dd0000
  R13: 000000000000e4e4 R14: 00000000000003c4 R15: 0000000000000000
  FS:  00007f253155a740(0000) GS:ffff9e644f600000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00005630d1500358 CR3: 0000000417c44006 CR4: 00000000003606e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   g94_i2c_aux_xfer+0x326/0x850 [nouveau]
   nvkm_i2c_aux_i2c_xfer+0x9e/0x140 [nouveau]
   __i2c_transfer+0x14b/0x620
   i2c_smbus_xfer_emulated+0x159/0x680
   ? _raw_spin_unlock_irqrestore+0x1/0x60
   ? rt_mutex_slowlock.constprop.0+0x13d/0x1e0
   ? __lock_is_held+0x59/0xa0
   __i2c_smbus_xfer+0x138/0x5a0
   i2c_smbus_xfer+0x4f/0x80
   i2cdev_ioctl_smbus+0x162/0x2d0 [i2c_dev]
   i2cdev_ioctl+0x1db/0x2c0 [i2c_dev]
   do_vfs_ioctl+0x408/0x750
   ksys_ioctl+0x5e/0x90
   __x64_sys_ioctl+0x16/0x20
   do_syscall_64+0x60/0x1e0
   entry_SYSCALL_64_after_hwframe+0x49/0xbe
  RIP: 0033:0x7f25317f546b
  Code: 0f 1e fa 48 8b 05 1d da 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff
  ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01
  f0 ff ff 73 01 c3 48 8b 0d ed d9 0c 00 f7 d8 64 89 01 48
  RSP: 002b:00007ffc88caab68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
  RAX: ffffffffffffffda RBX: 00005630d0fe7260 RCX: 00007f25317f546b
  RDX: 00005630d1598e80 RSI: 0000000000000720 RDI: 0000000000000003
  RBP: 00005630d155b968 R08: 0000000000000001 R09: 00005630d15a1da0
  R10: 0000000000000070 R11: 0000000000000246 R12: 00005630d1598e80
  R13: 00005630d12f3d28 R14: 0000000000000720 R15: 00005630d12f3ce0
  watchdog: BUG: soft lockup - CPU#5 stuck for 23s! [sensors-detect:12438]

Yikes! While I wanted to try to make it so that accessing an i2c bus on
nouveau would wake up the GPU as needed, airlied pointed out that pretty
much any usecase for userspace accessing an i2c bus on a GPU (mainly for
the DDC brightness control that some displays have) is going to only be
useful while there's at least one display enabled on the GPU anyway, and
the GPU never sleeps while there's displays running.

Since teaching the i2c bus to wake up the GPU on userspace accesses is a
good deal more difficult than it might seem, mostly due to the fact that
we have to use the i2c bus during runtime resume of the GPU, we instead
opt for the easiest solution: don't let userspace access i2c busses on
the GPU at all while it's in runtime suspend.

Changes since v1:
* Also disable i2c busses that run over DP AUX

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoALSA: hda/realtek - Set default power save node to 0
Kailang Yang [Thu, 23 May 2019 06:43:04 +0000 (14:43 +0800)]
ALSA: hda/realtek - Set default power save node to 0

commit 317d9313925cd8388304286c0d3c8dda7f060a2d upstream.

I measured power consumption between power_save_node=1 and power_save_node=0.
It's almost the same.
Codec will enter to runtime suspend and suspend.
That pin also will enter to D3. Don't need to enter to D3 by single pin.
So, Disable power_save_node as default. It will avoid more issues.
Windows Driver also has not this option at runtime PM.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agopowerpc/perf: Fix MMCRA corruption by bhrb_filter
Ravi Bangoria [Sat, 11 May 2019 02:42:17 +0000 (08:12 +0530)]
powerpc/perf: Fix MMCRA corruption by bhrb_filter

commit 3202e35ec1c8fc19cea24253ff83edf702a60a02 upstream.

Consider a scenario where user creates two events:

  1st event:
    attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
    attr.branch_sample_type = PERF_SAMPLE_BRANCH_ANY;
    fd = perf_event_open(attr, 0, 1, -1, 0);

  This sets cpuhw->bhrb_filter to 0 and returns valid fd.

  2nd event:
    attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
    attr.branch_sample_type = PERF_SAMPLE_BRANCH_CALL;
    fd = perf_event_open(attr, 0, 1, -1, 0);

  It overrides cpuhw->bhrb_filter to -1 and returns with error.

Now if power_pmu_enable() gets called by any path other than
power_pmu_add(), ppmu->config_bhrb(-1) will set MMCRA to -1.

Fixes: 3925f46bb590 ("powerpc/perf: Enable branch stack sampling framework")
Cc: stable@vger.kernel.org # v3.10+
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoBtrfs: fix race updating log root item during fsync
Filipe Manana [Wed, 15 May 2019 15:03:17 +0000 (16:03 +0100)]
Btrfs: fix race updating log root item during fsync

commit 06989c799f04810f6876900d4760c0edda369cf7 upstream.

When syncing the log, the final phase of a fsync operation, we need to
either create a log root's item or update the existing item in the log
tree of log roots, and that depends on the current value of the log
root's log_transid - if it's 1 we need to create the log root item,
otherwise it must exist already and we update it. Since there is no
synchronization between updating the log_transid and checking it for
deciding whether the log root's item needs to be created or updated, we
end up with a tiny race window that results in attempts to update the
item to fail because the item was not yet created:

              CPU 1                                    CPU 2

  btrfs_sync_log()

    lock root->log_mutex

    set log root's log_transid to 1

    unlock root->log_mutex

                                               btrfs_sync_log()

                                                 lock root->log_mutex

                                                 sets log root's
                                                 log_transid to 2

                                                 unlock root->log_mutex

    update_log_root()

      sees log root's log_transid
      with a value of 2

        calls btrfs_update_root(),
        which fails with -EUCLEAN
        and causes transaction abort

Until recently the race lead to a BUG_ON at btrfs_update_root(), but after
the recent commit 7ac1e464c4d47 ("btrfs: Don't panic when we can't find a
root key") we just abort the current transaction.

A sample trace of the BUG_ON() on a SLE12 kernel:

  ------------[ cut here ]------------
  kernel BUG at ../fs/btrfs/root-tree.c:157!
  Oops: Exception in kernel mode, sig: 5 [#1]
  SMP NR_CPUS=2048 NUMA pSeries
  (...)
  Supported: Yes, External
  CPU: 78 PID: 76303 Comm: rtas_errd Tainted: G                 X 4.4.156-94.57-default #1
  task: c00000ffa906d010 ti: c00000ff42b08000 task.ti: c00000ff42b08000
  NIP: d000000036ae5cdc LR: d000000036ae5cd8 CTR: 0000000000000000
  REGS: c00000ff42b0b860 TRAP: 0700   Tainted: G                 X  (4.4.156-94.57-default)
  MSR: 8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE>  CR: 22444484  XER: 20000000
  CFAR: d000000036aba66c SOFTE: 1
  GPR00: d000000036ae5cd8 c00000ff42b0bae0 d000000036bda220 0000000000000054
  GPR04: 0000000000000001 0000000000000000 c00007ffff8d37c8 0000000000000000
  GPR08: c000000000e19c00 0000000000000000 0000000000000000 3736343438312079
  GPR12: 3930373337303434 c000000007a3a800 00000000007fffff 0000000000000023
  GPR16: c00000ffa9d26028 c00000ffa9d261f8 0000000000000010 c00000ffa9d2ab28
  GPR20: c00000ff42b0bc48 0000000000000001 c00000ff9f0d9888 0000000000000001
  GPR24: c00000ffa9d26000 c00000ffa9d261e8 c00000ffa9d2a800 c00000ff9f0d9888
  GPR28: c00000ffa9d26028 c00000ffa9d2aa98 0000000000000001 c00000ffa98f5b20
  NIP [d000000036ae5cdc] btrfs_update_root+0x25c/0x4e0 [btrfs]
  LR [d000000036ae5cd8] btrfs_update_root+0x258/0x4e0 [btrfs]
  Call Trace:
  [c00000ff42b0bae0] [d000000036ae5cd8] btrfs_update_root+0x258/0x4e0 [btrfs] (unreliable)
  [c00000ff42b0bba0] [d000000036b53610] btrfs_sync_log+0x2d0/0xc60 [btrfs]
  [c00000ff42b0bce0] [d000000036b1785c] btrfs_sync_file+0x44c/0x4e0 [btrfs]
  [c00000ff42b0bd80] [c00000000032e300] vfs_fsync_range+0x70/0x120
  [c00000ff42b0bdd0] [c00000000032e44c] do_fsync+0x5c/0xb0
  [c00000ff42b0be10] [c00000000032e8dc] SyS_fdatasync+0x2c/0x40
  [c00000ff42b0be30] [c000000000009488] system_call+0x3c/0x100
  Instruction dump:
  7f43d378 4bffebb9 60000000 88d90008 3d220000 e8b90000 3b390009 e87a01f0
  e8898e08 e8f90000 4bfd48e5 60000000 <0fe00000e95b0060 39200004 394a0ea0
  ---[ end trace 8f2dc8f919cabab8 ]---

So fix this by doing the check of log_transid and updating or creating the
log root's item while holding the root's log_mutex.

Fixes: 7237f1833601d ("Btrfs: fix tree logs parallel sync")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoscsi: zfcp: fix to prevent port_remove with pure auto scan LUNs (only sdevs)
Steffen Maier [Thu, 23 May 2019 13:23:46 +0000 (15:23 +0200)]
scsi: zfcp: fix to prevent port_remove with pure auto scan LUNs (only sdevs)

commit ef4021fe5fd77ced0323cede27979d80a56211ca upstream.

When the user tries to remove a zfcp port via sysfs, we only rejected it if
there are zfcp unit children under the port. With purely automatically
scanned LUNs there are no zfcp units but only SCSI devices. In such cases,
the port_remove erroneously continued. We close the port and this
implicitly closes all LUNs under the port. The SCSI devices survive with
their private zfcp_scsi_dev still holding a reference to the "removed"
zfcp_port (still allocated but invisible in sysfs) [zfcp_get_port_by_wwpn
in zfcp_scsi_slave_alloc]. This is not a problem as long as the fc_rport
stays blocked. Once (auto) port scan brings back the removed port, we
unblock its fc_rport again by design.  However, there is no mechanism that
would recover (open) the LUNs under the port (no "ersfs_3" without
zfcp_unit [zfcp_erp_strategy_followup_success]).  Any pending or new I/O to
such LUN leads to repeated:

  Done: NEEDS_RETRY Result: hostbyte=DID_IMM_RETRY driverbyte=DRIVER_OK

See also v4.10 commit 6f2ce1c6af37 ("scsi: zfcp: fix rport unblock race
with LUN recovery"). Even a manual LUN recovery
(echo 0 > /sys/bus/scsi/devices/H:C:T:L/zfcp_failed)
does not help, as the LUN links to the old "removed" port which remains
to lack ZFCP_STATUS_COMMON_RUNNING [zfcp_erp_required_act].
The only workaround is to first ensure that the fc_rport is blocked
(e.g. port_remove again in case it was re-discovered by (auto) port scan),
then delete the SCSI devices, and finally re-discover by (auto) port scan.
The port scan includes an fc_rport unblock, which in turn triggers
a new scan on the scsi target to freshly get new pure auto scan LUNs.

Fix this by rejecting port_remove also if there are SCSI devices
(even without any zfcp_unit) under this port. Re-use mechanics from v3.7
commit d99b601b6338 ("[SCSI] zfcp: restore refcount check on port_remove").
However, we have to give up zfcp_sysfs_port_units_mutex earlier in unit_add
to prevent a deadlock with scsi_host scan taking shost->scan_mutex first
and then zfcp_sysfs_port_units_mutex now in our zfcp_scsi_slave_alloc().

Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Fixes: b62a8d9b45b9 ("[SCSI] zfcp: Use SCSI device data zfcp scsi dev instead of zfcp unit")
Fixes: f8210e34887e ("[SCSI] zfcp: Allow midlayer to scan for LUNs when running in NPIV mode")
Cc: <stable@vger.kernel.org> #2.6.37+
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoscsi: zfcp: fix missing zfcp_port reference put on -EBUSY from port_remove
Steffen Maier [Thu, 23 May 2019 13:23:45 +0000 (15:23 +0200)]
scsi: zfcp: fix missing zfcp_port reference put on -EBUSY from port_remove

commit d27e5e07f9c49bf2a6a4ef254ce531c1b4fb5a38 upstream.

With this early return due to zfcp_unit child(ren), we don't use the
zfcp_port reference from the earlier zfcp_get_port_by_wwpn() anymore and
need to put it.

Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Fixes: d99b601b6338 ("[SCSI] zfcp: restore refcount check on port_remove")
Cc: <stable@vger.kernel.org> #3.7+
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: smsusb: better handle optional alignment
Mauro Carvalho Chehab [Fri, 24 May 2019 14:59:43 +0000 (10:59 -0400)]
media: smsusb: better handle optional alignment

commit a47686636d84eaec5c9c6e84bd5f96bed34d526d upstream.

Most Siano devices require an alignment for the response.

Changeset f3be52b0056a ("media: usb: siano: Fix general protection fault in smsusb")
changed the logic with gets such aligment, but it now produces a
sparce warning:

drivers/media/usb/siano/smsusb.c: In function 'smsusb_init_device':
drivers/media/usb/siano/smsusb.c:447:37: warning: 'in_maxp' may be used uninitialized in this function [-Wmaybe-uninitialized]
  447 |   dev->response_alignment = in_maxp - sizeof(struct sms_msg_hdr);
      |                             ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

The sparse message itself is bogus, but a broken (or fake) USB
eeprom could produce a negative value for response_alignment.

So, change the code in order to check if the result is not
negative.

Fixes: 31e0456de5be ("media: usb: siano: Fix general protection fault in smsusb")
CC: <stable@vger.kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: usb: siano: Fix false-positive "uninitialized variable" warning
Alan Stern [Tue, 21 May 2019 15:38:07 +0000 (11:38 -0400)]
media: usb: siano: Fix false-positive "uninitialized variable" warning

commit 45457c01171fd1488a7000d1751c06ed8560ee38 upstream.

GCC complains about an apparently uninitialized variable recently
added to smsusb_init_device().  It's a false positive, but to silence
the warning this patch adds a trivial initialization.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: kbuild test robot <lkp@intel.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agomedia: usb: siano: Fix general protection fault in smsusb
Alan Stern [Tue, 7 May 2019 16:39:47 +0000 (12:39 -0400)]
media: usb: siano: Fix general protection fault in smsusb

commit 31e0456de5be379b10fea0fa94a681057114a96e upstream.

The syzkaller USB fuzzer found a general-protection-fault bug in the
smsusb part of the Siano DVB driver.  The fault occurs during probe
because the driver assumes without checking that the device has both
IN and OUT endpoints and the IN endpoint is ep1.

By slightly rearranging the driver's initialization code, we can make
the appropriate checks early on and thus avoid the problem.  If the
expected endpoints aren't present, the new code safely returns -ENODEV
from the probe routine.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: syzbot+53f029db71c19a47325a@syzkaller.appspotmail.com
CC: <stable@vger.kernel.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: rio500: fix memory leak in close after disconnect
Oliver Neukum [Thu, 9 May 2019 09:30:59 +0000 (11:30 +0200)]
USB: rio500: fix memory leak in close after disconnect

commit e0feb73428b69322dd5caae90b0207de369b5575 upstream.

If a disconnected device is closed, rio_close() must free
the buffers.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: rio500: refuse more than one device at a time
Oliver Neukum [Thu, 9 May 2019 09:30:58 +0000 (11:30 +0200)]
USB: rio500: refuse more than one device at a time

commit 3864d33943b4a76c6e64616280e98d2410b1190f upstream.

This driver is using a global variable. It cannot handle more than
one device at a time. The issue has been existing since the dawn
of the driver.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reported-by: syzbot+35f04d136fc975a70da4@syzkaller.appspotmail.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: Add LPM quirk for Surface Dock GigE adapter
Maximilian Luz [Thu, 16 May 2019 15:08:31 +0000 (17:08 +0200)]
USB: Add LPM quirk for Surface Dock GigE adapter

commit ea261113385ac0a71c2838185f39e8452d54b152 upstream.

Without USB_QUIRK_NO_LPM ethernet will not work and rtl8152 will
complain with

    r8152 <device...>: Stop submitting intr, status -71

Adding the quirk resolves this. As the dock is externally powered, this
should not have any drawbacks.

Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: sisusbvga: fix oops in error path of sisusb_probe
Oliver Neukum [Thu, 9 May 2019 12:41:50 +0000 (14:41 +0200)]
USB: sisusbvga: fix oops in error path of sisusb_probe

commit 9a5729f68d3a82786aea110b1bfe610be318f80a upstream.

The pointer used to log a failure of usb_register_dev() must
be set before the error is logged.

v2: fix that minor is not available before registration

Signed-off-by: oliver Neukum <oneukum@suse.com>
Reported-by: syzbot+a0cbdbd6d169020c8959@syzkaller.appspotmail.com
Fixes: 7b5cd5fefbe02 ("USB: SisUSB2VGA: Convert printk to dev_* macros")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoUSB: Fix slab-out-of-bounds write in usb_get_bos_descriptor
Alan Stern [Mon, 13 May 2019 17:14:29 +0000 (13:14 -0400)]
USB: Fix slab-out-of-bounds write in usb_get_bos_descriptor

commit a03ff54460817c76105f81f3aa8ef655759ccc9a upstream.

The syzkaller USB fuzzer found a slab-out-of-bounds write bug in the
USB core, caused by a failure to check the actual size of a BOS
descriptor.  This patch adds a check to make sure the descriptor is at
least as large as it is supposed to be, so that the code doesn't
inadvertently access memory beyond the end of the allocated region
when assigning to dev->bos->desc->bNumDeviceCaps later on.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: syzbot+71f1e64501a309fcc012@syzkaller.appspotmail.com
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousbip: usbip_host: fix stub_dev lock context imbalance regression
Shuah Khan [Wed, 29 May 2019 19:46:15 +0000 (13:46 -0600)]
usbip: usbip_host: fix stub_dev lock context imbalance regression

commit 3ea3091f1bd8586125848c62be295910e9802af0 upstream.

Fix the following sparse context imbalance regression introduced in
a patch that fixed sleeping function called from invalid context bug.

kbuild test robot reported on:

tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git  usb-linus

Regressions in current branch:

drivers/usb/usbip/stub_dev.c:399:9: sparse: sparse: context imbalance in 'stub_probe' - different lock contexts for basic block
drivers/usb/usbip/stub_dev.c:418:13: sparse: sparse: context imbalance in 'stub_disconnect' - different lock contexts for basic block
drivers/usb/usbip/stub_dev.c:464:1-10: second lock on line 476

Error ids grouped by kconfigs:

recent_errors
├── i386-allmodconfig
│   └── drivers-usb-usbip-stub_dev.c:second-lock-on-line
├── x86_64-allmodconfig
│   ├── drivers-usb-usbip-stub_dev.c:sparse:sparse:context-imbalance-in-stub_disconnect-different-lock-contexts-for-basic-block
│   └── drivers-usb-usbip-stub_dev.c:sparse:sparse:context-imbalance-in-stub_probe-different-lock-contexts-for-basic-block
└── x86_64-allyesconfig
    └── drivers-usb-usbip-stub_dev.c:second-lock-on-line

This is a real problem in an error leg where spin_lock() is called on an
already held lock.

Fix the imbalance in stub_probe() and stub_disconnect().

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Fixes: 0c9e8b3cad65 ("usbip: usbip_host: fix BUG: sleeping function called from invalid context")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousbip: usbip_host: fix BUG: sleeping function called from invalid context
Shuah Khan [Thu, 2 May 2019 19:47:02 +0000 (13:47 -0600)]
usbip: usbip_host: fix BUG: sleeping function called from invalid context

commit 0c9e8b3cad654bfc499c10b652fbf8f0b890af8f upstream.

stub_probe() and stub_disconnect() call functions which could call
sleeping function in invalid context whil holding busid_lock.

Fix the problem by refining the lock holds to short critical sections
to change the busid_priv fields. This fix restructures the code to
limit the lock holds in stub_probe() and stub_disconnect().

stub_probe():

[15217.927028] BUG: sleeping function called from invalid context at mm/slab.h:418
[15217.927038] in_atomic(): 1, irqs_disabled(): 0, pid: 29087, name: usbip
[15217.927044] 5 locks held by usbip/29087:
[15217.927047]  #0: 0000000091647f28 (sb_writers#6){....}, at: vfs_write+0x191/0x1c0
[15217.927062]  #1: 000000008f9ba75b (&of->mutex){....}, at: kernfs_fop_write+0xf7/0x1b0
[15217.927072]  #2: 00000000872e5b4b (&dev->mutex){....}, at: __device_driver_lock+0x3b/0x50
[15217.927082]  #3: 00000000e74ececc (&dev->mutex){....}, at: __device_driver_lock+0x46/0x50
[15217.927090]  #4: 00000000b20abbe0 (&(&busid_table[i].busid_lock)->rlock){....}, at: get_busid_priv+0x48/0x60 [usbip_host]
[15217.927103] CPU: 3 PID: 29087 Comm: usbip Tainted: G        W         5.1.0-rc6+ #40
[15217.927106] Hardware name: Dell Inc. OptiPlex 790/0HY9JP, BIOS A18 09/24/2013
[15217.927109] Call Trace:
[15217.927118]  dump_stack+0x63/0x85
[15217.927127]  ___might_sleep+0xff/0x120
[15217.927133]  __might_sleep+0x4a/0x80
[15217.927143]  kmem_cache_alloc_trace+0x1aa/0x210
[15217.927156]  stub_probe+0xe8/0x440 [usbip_host]
[15217.927171]  usb_probe_device+0x34/0x70

stub_disconnect():

[15279.182478] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908
[15279.182487] in_atomic(): 1, irqs_disabled(): 0, pid: 29114, name: usbip
[15279.182492] 5 locks held by usbip/29114:
[15279.182494]  #0: 0000000091647f28 (sb_writers#6){....}, at: vfs_write+0x191/0x1c0
[15279.182506]  #1: 00000000702cf0f3 (&of->mutex){....}, at: kernfs_fop_write+0xf7/0x1b0
[15279.182514]  #2: 00000000872e5b4b (&dev->mutex){....}, at: __device_driver_lock+0x3b/0x50
[15279.182522]  #3: 00000000e74ececc (&dev->mutex){....}, at: __device_driver_lock+0x46/0x50
[15279.182529]  #4: 00000000b20abbe0 (&(&busid_table[i].busid_lock)->rlock){....}, at: get_busid_priv+0x48/0x60 [usbip_host]
[15279.182541] CPU: 0 PID: 29114 Comm: usbip Tainted: G        W         5.1.0-rc6+ #40
[15279.182543] Hardware name: Dell Inc. OptiPlex 790/0HY9JP, BIOS A18 09/24/2013
[15279.182546] Call Trace:
[15279.182554]  dump_stack+0x63/0x85
[15279.182561]  ___might_sleep+0xff/0x120
[15279.182566]  __might_sleep+0x4a/0x80
[15279.182574]  __mutex_lock+0x55/0x950
[15279.182582]  ? get_busid_priv+0x48/0x60 [usbip_host]
[15279.182587]  ? reacquire_held_locks+0xec/0x1a0
[15279.182591]  ? get_busid_priv+0x48/0x60 [usbip_host]
[15279.182597]  ? find_held_lock+0x94/0xa0
[15279.182609]  mutex_lock_nested+0x1b/0x20
[15279.182614]  ? mutex_lock_nested+0x1b/0x20
[15279.182618]  kernfs_remove_by_name_ns+0x2a/0x90
[15279.182625]  sysfs_remove_file_ns+0x15/0x20
[15279.182629]  device_remove_file+0x19/0x20
[15279.182634]  stub_disconnect+0x6d/0x180 [usbip_host]
[15279.182643]  usb_unbind_device+0x27/0x60

Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousb: xhci: avoid null pointer deref when bos field is NULL
Carsten Schmid [Wed, 22 May 2019 11:33:59 +0000 (14:33 +0300)]
usb: xhci: avoid null pointer deref when bos field is NULL

commit 7aa1bb2ffd84d6b9b5f546b079bb15cd0ab6e76e upstream.

With defective USB sticks we see the following error happen:
usb 1-3: new high-speed USB device number 6 using xhci_hcd
usb 1-3: device descriptor read/64, error -71
usb 1-3: device descriptor read/64, error -71
usb 1-3: new high-speed USB device number 7 using xhci_hcd
usb 1-3: device descriptor read/64, error -71
usb 1-3: unable to get BOS descriptor set
usb 1-3: New USB device found, idVendor=0781, idProduct=5581
usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
...
BUG: unable to handle kernel NULL pointer dereference at 0000000000000008

This comes from the following place:
[ 1660.215380] IP: xhci_set_usb2_hardware_lpm+0xdf/0x3d0 [xhci_hcd]
[ 1660.222092] PGD 0 P4D 0
[ 1660.224918] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 1660.425520] CPU: 1 PID: 38 Comm: kworker/1:1 Tainted: P     U  W  O    4.14.67-apl #1
[ 1660.434277] Workqueue: usb_hub_wq hub_event [usbcore]
[ 1660.439918] task: ffffa295b6ae4c80 task.stack: ffffad4580150000
[ 1660.446532] RIP: 0010:xhci_set_usb2_hardware_lpm+0xdf/0x3d0 [xhci_hcd]
[ 1660.453821] RSP: 0018:ffffad4580153c70 EFLAGS: 00010046
[ 1660.459655] RAX: 0000000000000000 RBX: ffffa295b4d7c000 RCX: 0000000000000002
[ 1660.467625] RDX: 0000000000000002 RSI: ffffffff984a55b2 RDI: ffffffff984a55b2
[ 1660.475586] RBP: ffffad4580153cc8 R08: 0000000000d6520a R09: 0000000000000001
[ 1660.483556] R10: ffffad4580a004a0 R11: 0000000000000286 R12: ffffa295b4d7c000
[ 1660.491525] R13: 0000000000010648 R14: ffffa295a84e1800 R15: 0000000000000000
[ 1660.499494] FS:  0000000000000000(0000) GS:ffffa295bfc80000(0000) knlGS:0000000000000000
[ 1660.508530] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1660.514947] CR2: 0000000000000008 CR3: 000000025a114000 CR4: 00000000003406a0
[ 1660.522917] Call Trace:
[ 1660.525657]  usb_set_usb2_hardware_lpm+0x3d/0x70 [usbcore]
[ 1660.531792]  usb_disable_device+0x242/0x260 [usbcore]
[ 1660.537439]  usb_disconnect+0xc1/0x2b0 [usbcore]
[ 1660.542600]  hub_event+0x596/0x18f0 [usbcore]
[ 1660.547467]  ? trace_preempt_on+0xdf/0x100
[ 1660.552040]  ? process_one_work+0x1c1/0x410
[ 1660.556708]  process_one_work+0x1d2/0x410
[ 1660.561184]  ? preempt_count_add.part.3+0x21/0x60
[ 1660.566436]  worker_thread+0x2d/0x3f0
[ 1660.570522]  kthread+0x122/0x140
[ 1660.574123]  ? process_one_work+0x410/0x410
[ 1660.578792]  ? kthread_create_on_node+0x60/0x60
[ 1660.583849]  ret_from_fork+0x3a/0x50
[ 1660.587839] Code: 00 49 89 c3 49 8b 84 24 50 16 00 00 8d 4a ff 48 8d 04 c8 48 89 ca 4c 8b 10 45 8b 6a 04 48 8b 00 48 89 45 c0 49 8b 86 80 03 00 00 <48> 8b 40 08 8b 40 03 0f 1f 44 00 00 45 85 ff 0f 84 81 01 00 00
[ 1660.608980] RIP: xhci_set_usb2_hardware_lpm+0xdf/0x3d0 [xhci_hcd] RSP: ffffad4580153c70
[ 1660.617921] CR2: 0000000000000008

Tracking this down shows that udev->bos is NULL in the following code:
(xhci.c, in xhci_set_usb2_hardware_lpm)
field = le32_to_cpu(udev->bos->ext_cap->bmAttributes);  <<<<<<< here

xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n",
enable ? "enable" : "disable", port_num + 1);

if (enable) {
/* Host supports BESL timeout instead of HIRD */
if (udev->usb2_hw_lpm_besl_capable) {
/* if device doesn't have a preferred BESL value use a
 * default one which works with mixed HIRD and BESL
 * systems. See XHCI_DEFAULT_BESL definition in xhci.h
 */
if ((field & USB_BESL_SUPPORT) &&
    (field & USB_BESL_BASELINE_VALID))
hird = USB_GET_BESL_BASELINE(field);
else
hird = udev->l1_params.besl;

The failing case is when disabling LPM. So it is sufficient to avoid
access to udev->bos by moving the instruction into the "enable" clause.

Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Carsten Schmid <carsten_schmid@mentor.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoxhci: Convert xhci_handshake() to use readl_poll_timeout_atomic()
Andrey Smirnov [Wed, 22 May 2019 11:34:01 +0000 (14:34 +0300)]
xhci: Convert xhci_handshake() to use readl_poll_timeout_atomic()

commit f7fac17ca925faa03fc5eb854c081a24075f8bad upstream.

Xhci_handshake() implements the algorithm already captured by
readl_poll_timeout_atomic(). Convert the former to use the latter to
avoid repetition.

Turned out this patch also fixes a bug on the AMD Stoneyridge platform
where usleep(1) sometimes takes over 10ms.
This means a 5 second timeout can easily take over 15 seconds which will
trigger the watchdog and reboot the system.

[Add info about patch fixing a bug to commit message -Mathias]
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Tested-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-by: Raul E Rangel <rrangel@chromium.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoxhci: Use %zu for printing size_t type
Fabio Estevam [Wed, 22 May 2019 13:35:29 +0000 (10:35 -0300)]
xhci: Use %zu for printing size_t type

commit c1a145a3ed9a40f3b6145feb97789e8eb49c5566 upstream.

Commit 597c56e372da ("xhci: update bounce buffer with correct sg num")
caused the following build warnings:

drivers/usb/host/xhci-ring.c:676:19: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'size_t {aka unsigned int}' [-Wformat=]

Use %zu for printing size_t type in order to fix the warnings.

Fixes: 597c56e372da ("xhci: update bounce buffer with correct sg num")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoxhci: update bounce buffer with correct sg num
Henry Lin [Wed, 22 May 2019 11:33:57 +0000 (14:33 +0300)]
xhci: update bounce buffer with correct sg num

commit 597c56e372dab2c7f79b8d700aad3a5deebf9d1b upstream.

This change fixes a data corruption issue occurred on USB hard disk for
the case that bounce buffer is used during transferring data.

While updating data between sg list and bounce buffer, current
implementation passes mapped sg number (urb->num_mapped_sgs) to
sg_pcopy_from_buffer() and sg_pcopy_to_buffer(). This causes data
not get copied if target buffer is located in the elements after
mapped sg elements. This change passes sg number for full list to
fix issue.

Besides, for copying data from bounce buffer, calling dma_unmap_single()
on the bounce buffer before copying data to sg list can avoid cache issue.

Fixes: f9c589e142d0 ("xhci: TD-fragment, align the unsplittable case with a bounce buffer")
Cc: <stable@vger.kernel.org> # v4.8+
Signed-off-by: Henry Lin <henryl@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoinclude/linux/bitops.h: sanitize rotate primitives
Rasmus Villemoes [Tue, 14 May 2019 22:43:27 +0000 (15:43 -0700)]
include/linux/bitops.h: sanitize rotate primitives

commit ef4d6f6b275c498f8e5626c99dbeefdc5027f843 upstream.

The ror32 implementation (word >> shift) | (word << (32 - shift) has
undefined behaviour if shift is outside the [1, 31] range.  Similarly
for the 64 bit variants.  Most callers pass a compile-time constant
(naturally in that range), but there's an UBSAN report that these may
actually be called with a shift count of 0.

Instead of special-casing that, we can make them DTRT for all values of
shift while also avoiding UB.  For some reason, this was already partly
done for rol32 (which was well-defined for [0, 31]).  gcc 8 recognizes
these patterns as rotates, so for example

  __u32 rol32(__u32 word, unsigned int shift)
  {
return (word << (shift & 31)) | (word >> ((-shift) & 31));
  }

compiles to

0000000000000020 <rol32>:
  20:   89 f8                   mov    %edi,%eax
  22:   89 f1                   mov    %esi,%ecx
  24:   d3 c0                   rol    %cl,%eax
  26:   c3                      retq

Older compilers unfortunately do not do as well, but this only affects
the small minority of users that don't pass constants.

Due to integer promotions, ro[lr]8 were already well-defined for shifts
in [0, 8], and ro[lr]16 were mostly well-defined for shifts in [0, 16]
(only mostly - u16 gets promoted to _signed_ int, so if bit 15 is set,
word << 16 is undefined).  For consistency, update those as well.

Link: http://lkml.kernel.org/r/20190410211906.2190-1-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reported-by: Ido Schimmel <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Cc: Vadim Pasternak <vadimp@mellanox.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agosparc64: Fix regression in non-hypervisor TLB flush xcall
James Clarke [Wed, 29 May 2019 21:31:31 +0000 (22:31 +0100)]
sparc64: Fix regression in non-hypervisor TLB flush xcall

commit d3c976c14ad8af421134c428b0a89ff8dd3bd8f8 upstream.

Previously, %g2 would end up with the value PAGE_SIZE, but after the
commit mentioned below it ends up with the value 1 due to being reused
for a different purpose. We need it to be PAGE_SIZE as we use it to step
through pages in our demap loop, otherwise we set different flags in the
low 12 bits of the address written to, thereby doing things other than a
nucleus page flush.

Fixes: a74ad5e660a9 ("sparc64: Handle extremely large kernel TLB range flushes more gracefully.")
Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotipc: fix modprobe tipc failed after switch order of device registration
Junwei Hu [Mon, 20 May 2019 06:43:59 +0000 (14:43 +0800)]
tipc: fix modprobe tipc failed after switch order of device registration

commit 526f5b851a96566803ee4bee60d0a34df56c77f8 upstream.

Error message printed:
modprobe: ERROR: could not insert 'tipc': Address family not
supported by protocol.
when modprobe tipc after the following patch: switch order of
device registration, commit 7e27e8d6130c
("tipc: switch order of device registration to fix a crash")

Because sock_create_kern(net, AF_TIPC, ...) called by
tipc_topsrv_create_listener() in the initialization process
of tipc_init_net(), so tipc_socket_init() must be execute before that.
Meanwhile, tipc_net_id need to be initialized when sock_create()
called, and tipc_socket_init() is no need to be called for each namespace.

I add a variable tipc_topsrv_net_ops, and split the
register_pernet_subsys() of tipc into two parts, and split
tipc_socket_init() with initialization of pernet params.

By the way, I fixed resources rollback error when tipc_bcast_init()
failed in tipc_init_net().

Fixes: 7e27e8d6130c ("tipc: switch order of device registration to fix a crash")
Signed-off-by: Junwei Hu <hujunwei4@huawei.com>
Reported-by: Wang Wang <wangwang2@huawei.com>
Reported-by: syzbot+1e8114b61079bfe9cbc5@syzkaller.appspotmail.com
Reviewed-by: Kang Zhou <zhoukang7@huawei.com>
Reviewed-by: Suanming Mou <mousuanming@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoRevert "tipc: fix modprobe tipc failed after switch order of device registration"
David S. Miller [Fri, 17 May 2019 19:15:05 +0000 (12:15 -0700)]
Revert "tipc: fix modprobe tipc failed after switch order of device registration"

commit 5593530e56943182ebb6d81eca8a3be6db6dbba4 upstream.

This reverts commit 532b0f7ece4cb2ffd24dc723ddf55242d1188e5e.

More revisions coming up.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoxen/pciback: Don't disable PCI_COMMAND on PCI device reset.
Konrad Rzeszutek Wilk [Wed, 13 Feb 2019 23:21:31 +0000 (18:21 -0500)]
xen/pciback: Don't disable PCI_COMMAND on PCI device reset.

commit 7681f31ec9cdacab4fd10570be924f2cef6669ba upstream.

There is no need for this at all. Worst it means that if
the guest tries to write to BARs it could lead (on certain
platforms) to PCI SERR errors.

Please note that with af6fc858a35b90e89ea7a7ee58e66628c55c776b
"xen-pciback: limit guest control of command register"
a guest is still allowed to enable those control bits (safely), but
is not allowed to disable them and that therefore a well behaved
frontend which enables things before using them will still
function correctly.

This is done via an write to the configuration register 0x4 which
triggers on the backend side:
command_write
  \- pci_enable_device
     \- pci_enable_device_flags
        \- do_pci_enable_device
           \- pcibios_enable_device
              \-pci_enable_resourcess
                [which enables the PCI_COMMAND_MEMORY|PCI_COMMAND_IO]

However guests (and drivers) which don't do this could cause
problems, including the security issues which XSA-120 sought
to address.

Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agocrypto: vmx - ghash: do nosimd fallback manually
Daniel Axtens [Thu, 16 May 2019 15:40:02 +0000 (01:40 +1000)]
crypto: vmx - ghash: do nosimd fallback manually

commit 357d065a44cdd77ed5ff35155a989f2a763e96ef upstream.

VMX ghash was using a fallback that did not support interleaving simd
and nosimd operations, leading to failures in the extended test suite.

If I understood correctly, Eric's suggestion was to use the same
data format that the generic code uses, allowing us to call into it
with the same contexts. I wasn't able to get that to work - I think
there's a very different key structure and data layout being used.

So instead steal the arm64 approach and perform the fallback
operations directly if required.

Fixes: cc333cd68dfa ("crypto: vmx - Adding GHASH routines for VMX module")
Cc: stable@vger.kernel.org # v4.1+
Reported-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonet: mvpp2: fix bad MVPP2_TXQ_SCHED_TOKEN_CNTR_REG queue value
Antoine Tenart [Wed, 29 May 2019 13:59:48 +0000 (15:59 +0200)]
net: mvpp2: fix bad MVPP2_TXQ_SCHED_TOKEN_CNTR_REG queue value

[ Upstream commit 21808437214637952b61beaba6034d97880fbeb3 ]

MVPP2_TXQ_SCHED_TOKEN_CNTR_REG() expects the logical queue id but
the current code is passing the global tx queue offset, so it ends
up writing to unknown registers (between 0x8280 and 0x82fc, which
seemed to be unused by the hardware). This fixes the issue by using
the logical queue id instead.

Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonet: mvneta: Fix err code path of probe
Jisheng Zhang [Mon, 27 May 2019 11:04:17 +0000 (11:04 +0000)]
net: mvneta: Fix err code path of probe

[ Upstream commit d484e06e25ebb937d841dac02ac1fe76ec7d4ddd ]

Fix below issues in err code path of probe:
1. we don't need to unregister_netdev() because the netdev isn't
registered.
2. when register_netdev() fails, we also need to destroy bm pool for
HWBM case.

Fixes: dc35a10f68d3 ("net: mvneta: bm: add support for hardware buffer management")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonet: dsa: mv88e6xxx: fix handling of upper half of STATS_TYPE_PORT
Rasmus Villemoes [Wed, 29 May 2019 07:02:11 +0000 (07:02 +0000)]
net: dsa: mv88e6xxx: fix handling of upper half of STATS_TYPE_PORT

[ Upstream commit 84b3fd1fc9592d431e23b077e692fa4e3fd0f086 ]

Currently, the upper half of a 4-byte STATS_TYPE_PORT statistic ends
up in bits 47:32 of the return value, instead of bits 31:16 as they
should.

Fixes: 6e46e2d821bb ("net: dsa: mv88e6xxx: Fix u64 statistics")
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoipv4/igmp: fix build error if !CONFIG_IP_MULTICAST
Eric Dumazet [Thu, 23 May 2019 01:35:16 +0000 (18:35 -0700)]
ipv4/igmp: fix build error if !CONFIG_IP_MULTICAST

[ Upstream commit 903869bd10e6719b9df6718e785be7ec725df59f ]

ip_sf_list_clear_all() needs to be defined even if !CONFIG_IP_MULTICAST

Fixes: 3580d04aa674 ("ipv4/igmp: fix another memory leak in igmpv3_del_delrec()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoipv4/igmp: fix another memory leak in igmpv3_del_delrec()
Eric Dumazet [Wed, 22 May 2019 23:51:22 +0000 (16:51 -0700)]
ipv4/igmp: fix another memory leak in igmpv3_del_delrec()

[ Upstream commit 3580d04aa674383c42de7b635d28e52a1e5bc72c ]

syzbot reported memory leaks [1] that I have back tracked to
a missing cleanup from igmpv3_del_delrec() when
(im->sfmode != MCAST_INCLUDE)

Add ip_sf_list_clear_all() and kfree_pmc() helpers to explicitely
handle the cleanups before freeing.

[1]

BUG: memory leak
unreferenced object 0xffff888123e32b00 (size 64):
  comm "softirq", pid 0, jiffies 4294942968 (age 8.010s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 e0 00 00 01 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000006105011b>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<000000006105011b>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<000000006105011b>] slab_alloc mm/slab.c:3326 [inline]
    [<000000006105011b>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553
    [<000000004bba8073>] kmalloc include/linux/slab.h:547 [inline]
    [<000000004bba8073>] kzalloc include/linux/slab.h:742 [inline]
    [<000000004bba8073>] ip_mc_add1_src net/ipv4/igmp.c:1961 [inline]
    [<000000004bba8073>] ip_mc_add_src+0x36b/0x400 net/ipv4/igmp.c:2085
    [<00000000a46a65a0>] ip_mc_msfilter+0x22d/0x310 net/ipv4/igmp.c:2475
    [<000000005956ca89>] do_ip_setsockopt.isra.0+0x1795/0x1930 net/ipv4/ip_sockglue.c:957
    [<00000000848e2d2f>] ip_setsockopt+0x3b/0xb0 net/ipv4/ip_sockglue.c:1246
    [<00000000b9db185c>] udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2616
    [<000000003028e438>] sock_common_setsockopt+0x38/0x50 net/core/sock.c:3130
    [<0000000015b65589>] __sys_setsockopt+0x98/0x120 net/socket.c:2078
    [<00000000ac198ef0>] __do_sys_setsockopt net/socket.c:2089 [inline]
    [<00000000ac198ef0>] __se_sys_setsockopt net/socket.c:2086 [inline]
    [<00000000ac198ef0>] __x64_sys_setsockopt+0x26/0x30 net/socket.c:2086
    [<000000000a770437>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<00000000d3adb93b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 9c8bb163ae78 ("igmp, mld: Fix memory leak in igmpv3/mld_del_delrec()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Hangbin Liu <liuhangbin@gmail.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agobnxt_en: Fix aggregation buffer leak under OOM condition.
Michael Chan [Wed, 22 May 2019 23:12:54 +0000 (19:12 -0400)]
bnxt_en: Fix aggregation buffer leak under OOM condition.

[ Upstream commit 296d5b54163964b7ae536b8b57dfbd21d4e868e1 ]

For every RX packet, the driver replenishes all buffers used for that
packet and puts them back into the RX ring and RX aggregation ring.
In one code path where the RX packet has one RX buffer and one or more
aggregation buffers, we missed recycling the aggregation buffer(s) if
we are unable to allocate a new SKB buffer.  This leads to the
aggregation ring slowly running out of buffers over time.  Fix it
by properly recycling the aggregation buffers.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Reported-by: Rakesh Hemnani <rhemnani@fb.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agotipc: Avoid copying bytes beyond the supplied data
Chris Packham [Mon, 20 May 2019 03:45:36 +0000 (15:45 +1200)]
tipc: Avoid copying bytes beyond the supplied data

TLV_SET is called with a data pointer and a len parameter that tells us
how many bytes are pointed to by data. When invoking memcpy() we need
to careful to only copy len bytes.

Previously we would copy TLV_LENGTH(len) bytes which would copy an extra
4 bytes past the end of the data pointer which newer GCC versions
complain about.

 In file included from test.c:17:
 In function 'TLV_SET',
     inlined from 'test' at test.c:186:5:
 /usr/include/linux/tipc_config.h:317:3:
 warning: 'memcpy' forming offset [33, 36] is out of the bounds [0, 32]
 of object 'bearer_name' with type 'char[32]' [-Warray-bounds]
     memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 test.c: In function 'test':
 test.c::161:10: note:
 'bearer_name' declared here
     char bearer_name[TIPC_MAX_BEARER_NAME];
          ^~~~~~~~~~~

We still want to ensure any padding bytes at the end are initialised, do
this with a explicit memset() rather than copy bytes past the end of
data. Apply the same logic to TCM_SET.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agousbnet: fix kernel crash after disconnect
Kloetzke Jan [Tue, 21 May 2019 13:18:40 +0000 (13:18 +0000)]
usbnet: fix kernel crash after disconnect

[ Upstream commit ad70411a978d1e6e97b1e341a7bde9a79af0c93d ]

When disconnecting cdc_ncm the kernel sporadically crashes shortly
after the disconnect:

  [   57.868812] Unable to handle kernel NULL pointer dereference at virtual address 00000000
  ...
  [   58.006653] PC is at 0x0
  [   58.009202] LR is at call_timer_fn+0xec/0x1b4
  [   58.013567] pc : [<0000000000000000>] lr : [<ffffff80080f5130>] pstate: 00000145
  [   58.020976] sp : ffffff8008003da0
  [   58.024295] x29: ffffff8008003da0 x28: 0000000000000001
  [   58.029618] x27: 000000000000000a x26: 0000000000000100
  [   58.034941] x25: 0000000000000000 x24: ffffff8008003e68
  [   58.040263] x23: 0000000000000000 x22: 0000000000000000
  [   58.045587] x21: 0000000000000000 x20: ffffffc68fac1808
  [   58.050910] x19: 0000000000000100 x18: 0000000000000000
  [   58.056232] x17: 0000007f885aff8c x16: 0000007f883a9f10
  [   58.061556] x15: 0000000000000001 x14: 000000000000006e
  [   58.066878] x13: 0000000000000000 x12: 00000000000000ba
  [   58.072201] x11: ffffffc69ff1db30 x10: 0000000000000020
  [   58.077524] x9 : 8000100008001000 x8 : 0000000000000001
  [   58.082847] x7 : 0000000000000800 x6 : ffffff8008003e70
  [   58.088169] x5 : ffffffc69ff17a28 x4 : 00000000ffff138b
  [   58.093492] x3 : 0000000000000000 x2 : 0000000000000000
  [   58.098814] x1 : 0000000000000000 x0 : 0000000000000000
  ...
  [   58.205800] [<          (null)>]           (null)
  [   58.210521] [<ffffff80080f5298>] expire_timers+0xa0/0x14c
  [   58.215937] [<ffffff80080f542c>] run_timer_softirq+0xe8/0x128
  [   58.221702] [<ffffff8008081120>] __do_softirq+0x298/0x348
  [   58.227118] [<ffffff80080a6304>] irq_exit+0x74/0xbc
  [   58.232009] [<ffffff80080e17dc>] __handle_domain_irq+0x78/0xac
  [   58.237857] [<ffffff8008080cf4>] gic_handle_irq+0x80/0xac
  ...

The crash happens roughly 125..130ms after the disconnect. This
correlates with the 'delay' timer that is started on certain USB tx/rx
errors in the URB completion handler.

The problem is a race of usbnet_stop() with usbnet_start_xmit(). In
usbnet_stop() we call usbnet_terminate_urbs() to cancel all URBs in
flight. This only makes sense if no new URBs are submitted
concurrently, though. But the usbnet_start_xmit() can run at the same
time on another CPU which almost unconditionally submits an URB. The
error callback of the new URB will then schedule the timer after it was
already stopped.

The fix adds a check if the tx queue is stopped after the tx list lock
has been taken. This should reliably prevent the submission of new URBs
while usbnet_terminate_urbs() does its job. The same thing is done on
the rx side even though it might be safe due to other flags that are
checked there.

Signed-off-by: Jan Klötzke <Jan.Kloetzke@preh.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonet: stmmac: fix reset gpio free missing
Jisheng Zhang [Wed, 22 May 2019 10:05:09 +0000 (10:05 +0000)]
net: stmmac: fix reset gpio free missing

[ Upstream commit 49ce881c0d4c4a7a35358d9dccd5f26d0e56fc61 ]

Commit 984203ceff27 ("net: stmmac: mdio: remove reset gpio free")
removed the reset gpio free, when the driver is unbinded or rmmod,
we miss the gpio free.

This patch uses managed API to request the reset gpio, so that the
gpio could be freed properly.

Fixes: 984203ceff27 ("net: stmmac: mdio: remove reset gpio free")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonet-gro: fix use-after-free read in napi_gro_frags()
Eric Dumazet [Wed, 29 May 2019 22:36:10 +0000 (15:36 -0700)]
net-gro: fix use-after-free read in napi_gro_frags()

[ Upstream commit a4270d6795b0580287453ea55974d948393e66ef ]

If a network driver provides to napi_gro_frags() an
skb with a page fragment of exactly 14 bytes, the call
to gro_pull_from_frag0() will 'consume' the fragment
by calling skb_frag_unref(skb, 0), and the page might
be freed and reused.

Reading eth->h_proto at the end of napi_frags_skb() might
read mangled data, or crash under specific debugging features.

BUG: KASAN: use-after-free in napi_frags_skb net/core/dev.c:5833 [inline]
BUG: KASAN: use-after-free in napi_gro_frags+0xc6f/0xd10 net/core/dev.c:5841
Read of size 2 at addr ffff88809366840c by task syz-executor599/8957

CPU: 1 PID: 8957 Comm: syz-executor599 Not tainted 5.2.0-rc1+ #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188
 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
 kasan_report+0x12/0x20 mm/kasan/common.c:614
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/generic_report.c:142
 napi_frags_skb net/core/dev.c:5833 [inline]
 napi_gro_frags+0xc6f/0xd10 net/core/dev.c:5841
 tun_get_user+0x2f3c/0x3ff0 drivers/net/tun.c:1991
 tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2037
 call_write_iter include/linux/fs.h:1872 [inline]
 do_iter_readv_writev+0x5f8/0x8f0 fs/read_write.c:693
 do_iter_write fs/read_write.c:970 [inline]
 do_iter_write+0x184/0x610 fs/read_write.c:951
 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1015
 do_writev+0x15b/0x330 fs/read_write.c:1058

Fixes: a50e233c50db ("net-gro: restore frag0 optimization")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agonet: fec: fix the clk mismatch in failed_reset path
Andy Duan [Thu, 23 May 2019 01:55:28 +0000 (01:55 +0000)]
net: fec: fix the clk mismatch in failed_reset path

[ Upstream commit ce8d24f9a5965a58c588f9342689702a1024433c ]

Fix the clk mismatch in the error path "failed_reset" because
below error path will disable clk_ahb and clk_ipg directly, it
should use pm_runtime_put_noidle() instead of pm_runtime_put()
to avoid to call runtime resume callback.

Reported-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Tested-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agollc: fix skb leak in llc_build_and_send_ui_pkt()
Eric Dumazet [Tue, 28 May 2019 00:35:52 +0000 (17:35 -0700)]
llc: fix skb leak in llc_build_and_send_ui_pkt()

[ Upstream commit 8fb44d60d4142cd2a440620cd291d346e23c131e ]

If llc_mac_hdr_init() returns an error, we must drop the skb
since no llc_build_and_send_ui_pkt() caller will take care of this.

BUG: memory leak
unreferenced object 0xffff8881202b6800 (size 2048):
  comm "syz-executor907", pid 7074, jiffies 4294943781 (age 8.590s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    1a 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00  ...@............
  backtrace:
    [<00000000e25b5abe>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<00000000e25b5abe>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<00000000e25b5abe>] slab_alloc mm/slab.c:3326 [inline]
    [<00000000e25b5abe>] __do_kmalloc mm/slab.c:3658 [inline]
    [<00000000e25b5abe>] __kmalloc+0x161/0x2c0 mm/slab.c:3669
    [<00000000a1ae188a>] kmalloc include/linux/slab.h:552 [inline]
    [<00000000a1ae188a>] sk_prot_alloc+0xd6/0x170 net/core/sock.c:1608
    [<00000000ded25bbe>] sk_alloc+0x35/0x2f0 net/core/sock.c:1662
    [<000000002ecae075>] llc_sk_alloc+0x35/0x170 net/llc/llc_conn.c:950
    [<00000000551f7c47>] llc_ui_create+0x7b/0x140 net/llc/af_llc.c:173
    [<0000000029027f0e>] __sock_create+0x164/0x250 net/socket.c:1430
    [<000000008bdec225>] sock_create net/socket.c:1481 [inline]
    [<000000008bdec225>] __sys_socket+0x69/0x110 net/socket.c:1523
    [<00000000b6439228>] __do_sys_socket net/socket.c:1532 [inline]
    [<00000000b6439228>] __se_sys_socket net/socket.c:1530 [inline]
    [<00000000b6439228>] __x64_sys_socket+0x1e/0x30 net/socket.c:1530
    [<00000000cec820c1>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<000000000c32554f>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811d750d00 (size 224):
  comm "syz-executor907", pid 7074, jiffies 4294943781 (age 8.600s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 f0 0c 24 81 88 ff ff 00 68 2b 20 81 88 ff ff  ...$.....h+ ....
  backtrace:
    [<0000000053026172>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline]
    [<0000000053026172>] slab_post_alloc_hook mm/slab.h:439 [inline]
    [<0000000053026172>] slab_alloc_node mm/slab.c:3269 [inline]
    [<0000000053026172>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
    [<00000000fa8f3c30>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
    [<00000000d96fdafb>] alloc_skb include/linux/skbuff.h:1058 [inline]
    [<00000000d96fdafb>] alloc_skb_with_frags+0x5f/0x250 net/core/skbuff.c:5327
    [<000000000a34a2e7>] sock_alloc_send_pskb+0x269/0x2a0 net/core/sock.c:2225
    [<00000000ee39999b>] sock_alloc_send_skb+0x32/0x40 net/core/sock.c:2242
    [<00000000e034d810>] llc_ui_sendmsg+0x10a/0x540 net/llc/af_llc.c:933
    [<00000000c0bc8445>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000c0bc8445>] sock_sendmsg+0x54/0x70 net/socket.c:671
    [<000000003b687167>] __sys_sendto+0x148/0x1f0 net/socket.c:1964
    [<00000000922d78d9>] __do_sys_sendto net/socket.c:1976 [inline]
    [<00000000922d78d9>] __se_sys_sendto net/socket.c:1972 [inline]
    [<00000000922d78d9>] __x64_sys_sendto+0x2a/0x30 net/socket.c:1972
    [<00000000cec820c1>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301
    [<000000000c32554f>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoipv6: Consider sk_bound_dev_if when binding a raw socket to an address
Mike Manning [Mon, 20 May 2019 18:57:17 +0000 (19:57 +0100)]
ipv6: Consider sk_bound_dev_if when binding a raw socket to an address

[ Upstream commit 72f7cfab6f93a8ea825fab8ccfb016d064269f7f ]

IPv6 does not consider if the socket is bound to a device when binding
to an address. The result is that a socket can be bound to eth0 and
then bound to the address of eth1. If the device is a VRF, the result
is that a socket can only be bound to an address in the default VRF.

Resolve by considering the device if sk_bound_dev_if is set.

Signed-off-by: Mike Manning <mmanning@vyatta.att-mail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5 years agoLinux 4.9.180
Greg Kroah-Hartman [Fri, 31 May 2019 13:48:32 +0000 (06:48 -0700)]
Linux 4.9.180

5 years agodrm: Wake up next in drm_read() chain if we are forced to putback the event
Chris Wilson [Fri, 4 Aug 2017 08:23:28 +0000 (09:23 +0100)]
drm: Wake up next in drm_read() chain if we are forced to putback the event

[ Upstream commit 60b801999c48b6c1dd04e653a38e2e613664264e ]

After an event is sent, we try to copy it into the user buffer of the
first waiter in drm_read() and if the user buffer doesn't have enough
room we put it back onto the list. However, we didn't wake up any
subsequent waiter, so that event may sit on the list until either a new
vblank event is sent or a new waiter appears. Rare, but in the worst
case may lead to a stuck process.

Testcase: igt/drm_read/short-buffer-wakeup
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170804082328.17173-1-chris@chris-wilson.co.uk
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoASoC: davinci-mcasp: Fix clang warning without CONFIG_PM
Arnd Bergmann [Thu, 7 Mar 2019 10:11:30 +0000 (11:11 +0100)]
ASoC: davinci-mcasp: Fix clang warning without CONFIG_PM

[ Upstream commit 8ca5104715cfd14254ea5aecc390ae583b707607 ]

Building with clang shows a variable that is only used by the
suspend/resume functions but defined outside of their #ifdef block:

sound/soc/ti/davinci-mcasp.c:48:12: error: variable 'context_regs' is not needed and will not be emitted

We commonly fix these by marking the PM functions as __maybe_unused,
but here that would grow the davinci_mcasp structure, so instead
add another #ifdef here.

Fixes: 1cc0c054f380 ("ASoC: davinci-mcasp: Convert the context save/restore to use array")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agospi: Fix zero length xfer bug
Chris Lesiak [Thu, 7 Mar 2019 20:39:00 +0000 (20:39 +0000)]
spi: Fix zero length xfer bug

[ Upstream commit 5442dcaa0d90fc376bdfc179a018931a8f43dea4 ]

This fixes a bug for messages containing both zero length and
unidirectional xfers.

The function spi_map_msg will allocate dummy tx and/or rx buffers
for use with unidirectional transfers when the hardware can only do
a bidirectional transfer.  That dummy buffer will be used in place
of a NULL buffer even when the xfer length is 0.

Then in the function __spi_map_msg, if he hardware can dma,
the zero length xfer will have spi_map_buf called on the dummy
buffer.

Eventually, __sg_alloc_table is called and returns -EINVAL
because nents == 0.

This fix prevents the error by not using the dummy buffer when
the xfer length is zero.

Signed-off-by: Chris Lesiak <chris.lesiak@licor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agospi: rspi: Fix sequencer reset during initialization
Geert Uytterhoeven [Tue, 12 Mar 2019 18:45:13 +0000 (19:45 +0100)]
spi: rspi: Fix sequencer reset during initialization

[ Upstream commit 26843bb128590edd7eba1ad7ce22e4b9f1066ce3 ]

While the sequencer is reset after each SPI message since commit
880c6d114fd79a69 ("spi: rspi: Add support for Quad and Dual SPI
Transfers on QSPI"), it was never reset for the first message, thus
relying on reset state or bootloader settings.

Fix this by initializing it explicitly during configuration.

Fixes: 0b2182ddac4b8837 ("spi: add support for Renesas RSPI")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agospi : spi-topcliff-pch: Fix to handle empty DMA buffers
Aditya Pakki [Wed, 13 Mar 2019 16:55:41 +0000 (11:55 -0500)]
spi : spi-topcliff-pch: Fix to handle empty DMA buffers

[ Upstream commit f37d8e67f39e6d3eaf4cc5471e8a3d21209843c6 ]

pch_alloc_dma_buf allocated tx, rx DMA buffers which can fail. Further,
these buffers are used without a check. The patch checks for these
failures and sends the error upstream.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: lpfc: Fix SLI3 commands being issued on SLI4 devices
James Smart [Tue, 12 Mar 2019 23:30:07 +0000 (16:30 -0700)]
scsi: lpfc: Fix SLI3 commands being issued on SLI4 devices

[ Upstream commit c95a3b4b0fb8d351e2329a96f87c4fc96a149505 ]

During debug, it was seen that the driver is issuing commands specific to
SLI3 on SLI4 devices. Although the adapter correctly rejected the command,
this should not be done.

Revise the code to stop sending these commands on a SLI4 adapter.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomedia: saa7146: avoid high stack usage with clang
Arnd Bergmann [Tue, 19 Feb 2019 17:01:56 +0000 (12:01 -0500)]
media: saa7146: avoid high stack usage with clang

[ Upstream commit 03aa4f191a36f33fce015387f84efa0eee94408e ]

Two saa7146/hexium files contain a construct that causes a warning
when built with clang:

drivers/media/pci/saa7146/hexium_orion.c:210:12: error: stack frame size of 2272 bytes in function 'hexium_probe'
      [-Werror,-Wframe-larger-than=]
static int hexium_probe(struct saa7146_dev *dev)
           ^
drivers/media/pci/saa7146/hexium_gemini.c:257:12: error: stack frame size of 2304 bytes in function 'hexium_attach'
      [-Werror,-Wframe-larger-than=]
static int hexium_attach(struct saa7146_dev *dev, struct saa7146_pci_extension_data *info)
           ^

This one happens regardless of KASAN, and the problem is that a
constructor to initialize a dynamically allocated structure leads
to a copy of that structure on the stack, whereas gcc initializes
it in place.

Link: https://bugs.llvm.org/show_bug.cgi?id=40776
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix checkpatch warnings]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: lpfc: Fix FDMI manufacturer attribute value
James Smart [Tue, 12 Mar 2019 23:30:20 +0000 (16:30 -0700)]
scsi: lpfc: Fix FDMI manufacturer attribute value

[ Upstream commit d67f935b79a76ac9d86dde1a27bdd413feb5d987 ]

The FDMI manufacturer value being reported on Linux is inconsistent with
other OS's.

Set the value to "Emulex Corporation" for consistency.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomedia: go7007: avoid clang frame overflow warning with KASAN
Arnd Bergmann [Tue, 19 Feb 2019 17:01:58 +0000 (12:01 -0500)]
media: go7007: avoid clang frame overflow warning with KASAN

[ Upstream commit ed713a4a1367aca5c0f2f329579465db00c17995 ]

clang-8 warns about one function here when KASAN is enabled, even
without the 'asan-stack' option:

drivers/media/usb/go7007/go7007-fw.c:1551:5: warning: stack frame size of 2656 bytes in function

I have reported this issue in the llvm bugzilla, but to make
it work with the clang-8 release, a small annotation is still
needed.

Link: https://bugs.llvm.org/show_bug.cgi?id=38809
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix checkpatch warning]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomedia: m88ds3103: serialize reset messages in m88ds3103_set_frontend
James Hutchinson [Sun, 13 Jan 2019 21:13:47 +0000 (16:13 -0500)]
media: m88ds3103: serialize reset messages in m88ds3103_set_frontend

[ Upstream commit 981fbe3da20a6f35f17977453bce7dfc1664d74f ]

Ref: https://bugzilla.kernel.org/show_bug.cgi?id=199323

Users are experiencing problems with the DVBSky S960/S960C USB devices
since the following commit:

9d659ae: ("locking/mutex: Add lock handoff to avoid starvation")

The device malfunctions after running for an indeterminable period of
time, and the problem can only be cleared by rebooting the machine.

It is possible to encourage the problem to surface by blocking the
signal to the LNB.

Further debugging revealed the cause of the problem.

In the following capture:
- thread #1325 is running m88ds3103_set_frontend
- thread #42 is running ts2020_stat_work

a> [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 07 80
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 08
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 68 3f
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 08 ff
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 60 3d
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07 ff
b> [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 07 00
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 60 21
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07 ff
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [42] usb 1-1: dvb_usb_v2_generic_io: >>> 09 01 01 60 66
   [42] usb 1-1: dvb_usb_v2_generic_io: <<< 07 ff
   [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 68 02 03 11
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 07
   [1325] usb 1-1: dvb_usb_v2_generic_io: >>> 08 60 02 10 0b
   [1325] usb 1-1: dvb_usb_v2_generic_io: <<< 07

Two i2c messages are sent to perform a reset in m88ds3103_set_frontend:

  a. 0x07, 0x80
  b. 0x07, 0x00

However, as shown in the capture, the regmap mutex is being handed over
to another thread (ts2020_stat_work) in between these two messages.

>From here, the device responds to every i2c message with an 07 message,
and will only return to normal operation following a power cycle.

Use regmap_multi_reg_write to group the two reset messages, ensuring
both are processed before the regmap mutex is unlocked.

Signed-off-by: James Hutchinson <jahutchinson99@googlemail.com>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agodmaengine: tegra210-adma: use devm_clk_*() helpers
Sameer Pujar [Wed, 13 Mar 2019 11:32:36 +0000 (17:02 +0530)]
dmaengine: tegra210-adma: use devm_clk_*() helpers

[ Upstream commit f6ed6491d565c336a360471e0c29228e34f4380e ]

adma driver is using pm_clk_*() interface for managing clock resources.
With this it is observed that clocks remain ON always. This happens on
Tegra devices which use BPMP co-processor to manage clock resources,
where clocks are enabled during prepare phase. This is necessary because
clocks to BPMP are always blocking. When pm_clk_*() interface is used on
such Tegra devices, clock prepare count is not balanced till remove call
happens for the driver and hence clocks are seen ON always. Thus this
patch replaces pm_clk_*() with devm_clk_*() framework.

Suggested-by: Mohan Kumar D <mkumard@nvidia.com>
Reviewed-by: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: qla4xxx: avoid freeing unallocated dma memory
Arnd Bergmann [Fri, 22 Mar 2019 14:25:03 +0000 (15:25 +0100)]
scsi: qla4xxx: avoid freeing unallocated dma memory

[ Upstream commit 608f729c31d4caf52216ea00d20092a80959256d ]

Clang -Wuninitialized notices that on is_qla40XX we never allocate any DMA
memory in get_fw_boot_info() but attempt to free it anyway:

drivers/scsi/qla4xxx/ql4_os.c:5915:7: error: variable 'buf_dma' is used uninitialized whenever 'if' condition is false
      [-Werror,-Wsometimes-uninitialized]
                if (!(val & 0x07)) {
                    ^~~~~~~~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5985:47: note: uninitialized use occurs here
        dma_free_coherent(&ha->pdev->dev, size, buf, buf_dma);
                                                     ^~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5915:3: note: remove the 'if' if its condition is always true
                if (!(val & 0x07)) {
                ^~~~~~~~~~~~~~~~~~~
drivers/scsi/qla4xxx/ql4_os.c:5885:20: note: initialize the variable 'buf_dma' to silence this warning
        dma_addr_t buf_dma;
                          ^
                           = 0

Skip the call to dma_free_coherent() here.

Fixes: 2a991c215978 ("[SCSI] qla4xxx: Boot from SAN support for open-iscsi")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agousb: core: Add PM runtime calls to usb_hcd_platform_shutdown
Tony Lindgren [Fri, 22 Mar 2019 21:54:05 +0000 (14:54 -0700)]
usb: core: Add PM runtime calls to usb_hcd_platform_shutdown

[ Upstream commit 8ead7e817224d7832fe51a19783cb8fcadc79467 ]

If ohci-platform is runtime suspended, we can currently get an "imprecise
external abort" on reboot with ohci-platform loaded when PM runtime
is implemented for the SoC.

Let's fix this by adding PM runtime support to usb_hcd_platform_shutdown.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agorcuperf: Fix cleanup path for invalid perf_type strings
Paul E. McKenney [Thu, 21 Mar 2019 17:26:41 +0000 (10:26 -0700)]
rcuperf: Fix cleanup path for invalid perf_type strings

[ Upstream commit ad092c027713a68a34168942a5ef422e42e039f4 ]

If the specified rcuperf.perf_type is not in the rcu_perf_init()
function's perf_ops[] array, rcuperf prints some console messages and
then invokes rcu_perf_cleanup() to set state so that a future torture
test can run.  However, rcu_perf_cleanup() also attempts to end the
test that didn't actually start, and in doing so relies on the value
of cur_ops, a value that is not particularly relevant in this case.
This can result in confusing output or even follow-on failures due to
attempts to use facilities that have not been properly initialized.

This commit therefore sets the value of cur_ops to NULL in this case and
inserts a check near the beginning of rcu_perf_cleanup(), thus avoiding
relying on an irrelevant cur_ops value.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agorcutorture: Fix cleanup path for invalid torture_type strings
Paul E. McKenney [Thu, 21 Mar 2019 16:27:28 +0000 (09:27 -0700)]
rcutorture: Fix cleanup path for invalid torture_type strings

[ Upstream commit b813afae7ab6a5e91b4e16cc567331d9c2ae1f04 ]

If the specified rcutorture.torture_type is not in the rcu_torture_init()
function's torture_ops[] array, rcutorture prints some console messages
and then invokes rcu_torture_cleanup() to set state so that a future
torture test can run.  However, rcu_torture_cleanup() also attempts to
end the test that didn't actually start, and in doing so relies on the
value of cur_ops, a value that is not particularly relevant in this case.
This can result in confusing output or even follow-on failures due to
attempts to use facilities that have not been properly initialized.

This commit therefore sets the value of cur_ops to NULL in this case
and inserts a check near the beginning of rcu_torture_cleanup(),
thus avoiding relying on an irrelevant cur_ops value.

Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agox86/mce: Fix machine_check_poll() tests for error types
Tony Luck [Tue, 12 Mar 2019 17:09:38 +0000 (10:09 -0700)]
x86/mce: Fix machine_check_poll() tests for error types

[ Upstream commit f19501aa07f18268ab14f458b51c1c6b7f72a134 ]

There has been a lurking "TBD" in the machine check poll routine ever
since it was first split out from the machine check handler. The
potential issue is that the poll routine may have just begun a read from
the STATUS register in a machine check bank when the hardware logs an
error in that bank and signals a machine check.

That race used to be pretty small back when machine checks were
broadcast, but the addition of local machine check means that the poll
code could continue running and clear the error from the bank before the
local machine check handler on another CPU gets around to reading it.

Fix the code to be sure to only process errors that need to be processed
in the poll code, leaving other logged errors alone for the machine
check handler to find and process.

 [ bp: Massage a bit and flip the "== 0" check to the usual !(..) test. ]

Fixes: b79109c3bbcf ("x86, mce: separate correct machine check poller and fatal exception handler")
Fixes: ed7290d0ee8f ("x86, mce: implement new status bits")
Reported-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Cc: Yazen Ghannam <Yazen.Ghannam@amd.com>
Link: https://lkml.kernel.org/r/20190312170938.GA23035@agluck-desk
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agotty: ipwireless: fix missing checks for ioremap
Kangjie Lu [Fri, 15 Mar 2019 07:07:12 +0000 (02:07 -0500)]
tty: ipwireless: fix missing checks for ioremap

[ Upstream commit 1bbb1c318cd8a3a39e8c3e2e83d5e90542d6c3e3 ]

ipw->attr_memory and ipw->common_memory are assigned with the
return value of ioremap. ioremap may fail, but no checks
are enforced. The fix inserts the checks to avoid potential
NULL pointer dereferences.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agovirtio_console: initialize vtermno value for ports
Pankaj Gupta [Tue, 19 Mar 2019 06:04:06 +0000 (11:34 +0530)]
virtio_console: initialize vtermno value for ports

[ Upstream commit 4b0a2c5ff7215206ea6135a405f17c5f6fca7d00 ]

For regular serial ports we do not initialize value of vtermno
variable. A garbage value is assigned for non console ports.
The value can be observed as a random integer with [1].

[1] vim /sys/kernel/debug/virtio-ports/vport*p*

This patch initialize the value of vtermno for console serial
ports to '1' and regular serial ports are initiaized to '0'.

Reported-by: siliu@redhat.com
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomedia: wl128x: prevent two potential buffer overflows
Dan Carpenter [Tue, 26 Mar 2019 05:12:07 +0000 (01:12 -0400)]
media: wl128x: prevent two potential buffer overflows

[ Upstream commit 9c2ccc324b3a6cbc865ab8b3e1a09e93d3c8ade9 ]

Smatch marks skb->data as untrusted so it warns that "evt_hdr->dlen"
can copy up to 255 bytes and we only have room for two bytes.  Even
if this comes from the firmware and we trust it, the new policy
generally is just to fix it as kernel hardenning.

I can't test this code so I tried to be very conservative.  I considered
not allowing "evt_hdr->dlen == 1" because it doesn't initialize the
whole variable but in the end I decided to allow it and manually
initialized "asic_id" and "asic_ver" to zero.

Fixes: e8454ff7b9a4 ("[media] drivers:media:radio: wl128x: FM Driver Common sources")

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agospi: tegra114: reset controller on probe
Sowjanya Komatineni [Wed, 27 Mar 2019 05:56:32 +0000 (22:56 -0700)]
spi: tegra114: reset controller on probe

[ Upstream commit 019194933339b3e9b486639c8cb3692020844d65 ]

Fixes: SPI driver can be built as module so perform SPI controller reset
on probe to make sure it is in valid state before initiating transfer.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocxgb3/l2t: Fix undefined behaviour
Gustavo A. R. Silva [Fri, 29 Mar 2019 15:27:26 +0000 (10:27 -0500)]
cxgb3/l2t: Fix undefined behaviour

[ Upstream commit 76497732932f15e7323dc805e8ea8dc11bb587cf ]

The use of zero-sized array causes undefined behaviour when it is not
the last member in a structure. As it happens to be in this case.

Also, the current code makes use of a language extension to the C90
standard, but the preferred mechanism to declare variable-length
types such as this one is a flexible array member, introduced in
C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last. Which is beneficial
to cultivate a high-quality code.

Fixes: e48f129c2f20 ("[SCSI] cxgb3i: convert cdev->l2opt to use rcu to prevent NULL dereference")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoASoC: fsl_utils: fix a leaked reference by adding missing of_node_put
Wen Yang [Tue, 26 Feb 2019 08:17:50 +0000 (16:17 +0800)]
ASoC: fsl_utils: fix a leaked reference by adding missing of_node_put

[ Upstream commit c705247136a523488eac806bd357c3e5d79a7acd ]

The call to of_parse_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./sound/soc/fsl/fsl_utils.c:74:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 38, but without a corresponding     object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Timur Tabi <timur@kernel.org>
Cc: Nicolin Chen <nicoleotsuka@gmail.com>
Cc: Xiubo Li <Xiubo.Lee@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoASoC: eukrea-tlv320: fix a leaked reference by adding missing of_node_put
Wen Yang [Tue, 26 Feb 2019 08:17:51 +0000 (16:17 +0800)]
ASoC: eukrea-tlv320: fix a leaked reference by adding missing of_node_put

[ Upstream commit b820d52e7eed7b30b2dfef5f4213a2bc3cbea6f3 ]

The call to of_parse_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./sound/soc/fsl/eukrea-tlv320.c:121:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 102, but without a correspo    nding object release within this function.
./sound/soc/fsl/eukrea-tlv320.c:127:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 102, but without a correspo    nding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoHID: core: move Usage Page concatenation to Main item
Nicolas Saenz Julienne [Wed, 27 Mar 2019 10:18:48 +0000 (11:18 +0100)]
HID: core: move Usage Page concatenation to Main item

[ Upstream commit 58e75155009cc800005629955d3482f36a1e0eec ]

As seen on some USB wireless keyboards manufactured by Primax, the HID
parser was using some assumptions that are not always true. In this case
it's s the fact that, inside the scope of a main item, an Usage Page
will always precede an Usage.

The spec is not pretty clear as 6.2.2.7 states "Any usage that follows
is interpreted as a Usage ID and concatenated with the Usage Page".
While 6.2.2.8 states "When the parser encounters a main item it
concatenates the last declared Usage Page with a Usage to form a
complete usage value." Being somewhat contradictory it was decided to
match Window's implementation, which follows 6.2.2.8.

In summary, the patch moves the Usage Page concatenation from the local
item parsing function to the main item parsing function.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Terry Junge <terry.junge@poly.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agochardev: add additional check for minor range overlap
Chengguang Xu [Fri, 15 Feb 2019 12:27:11 +0000 (20:27 +0800)]
chardev: add additional check for minor range overlap

[ Upstream commit de36e16d1557a0b6eb328bc3516359a12ba5c25c ]

Current overlap checking cannot correctly handle
a case which is baseminor < existing baseminor &&
baseminor + minorct > existing baseminor + minorct.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agox86/ia32: Fix ia32_restore_sigcontext() AC leak
Peter Zijlstra [Mon, 25 Feb 2019 11:56:35 +0000 (12:56 +0100)]
x86/ia32: Fix ia32_restore_sigcontext() AC leak

[ Upstream commit 67a0514afdbb8b2fc70b771b8c77661a9cb9d3a9 ]

Objtool spotted that we call native_load_gs_index() with AC set.
Re-arrange the code to avoid that.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agox86/uaccess, signal: Fix AC=1 bloat
Peter Zijlstra [Wed, 3 Apr 2019 07:39:48 +0000 (09:39 +0200)]
x86/uaccess, signal: Fix AC=1 bloat

[ Upstream commit 88e4718275c1bddca6f61f300688b4553dc8584b ]

Occasionally GCC is less agressive with inlining and the following is
observed:

  arch/x86/kernel/signal.o: warning: objtool: restore_sigcontext()+0x3cc: call to force_valid_ss.isra.5() with UACCESS enabled
  arch/x86/kernel/signal.o: warning: objtool: do_signal()+0x384: call to frame_uc_flags.isra.0() with UACCESS enabled

Cure this by moving this code out of the AC=1 region, since it really
isn't needed for the user access.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoarm64: cpu_ops: fix a leaked reference by adding missing of_node_put
Wen Yang [Tue, 5 Mar 2019 11:34:05 +0000 (19:34 +0800)]
arm64: cpu_ops: fix a leaked reference by adding missing of_node_put

[ Upstream commit 92606ec9285fb84cd9b5943df23f07d741384bfc ]

The call to of_get_next_child returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
  ./arch/arm64/kernel/cpu_ops.c:102:1-7: ERROR: missing of_node_put;
  acquired a node pointer with refcount incremented on line 69, but
  without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: ufs: Avoid configuring regulator with undefined voltage range
Stanley Chu [Thu, 28 Mar 2019 09:16:24 +0000 (17:16 +0800)]
scsi: ufs: Avoid configuring regulator with undefined voltage range

[ Upstream commit 3b141e8cfd54ba3e5c610717295b2a02aab26a05 ]

For regulators used by UFS, vcc, vccq and vccq2 will have voltage range
initialized by ufshcd_populate_vreg(), however other regulators may have
undefined voltage range if dt-bindings have no such definition.

In above undefined case, both "min_uV" and "max_uV" fields in ufs_vreg
struct will be zero values and these values will be configured on
regulators in different power modes.

Currently this may have no harm if both "min_uV" and "max_uV" always keep
"zero values" because regulator_set_voltage() will always bypass such
invalid values and return "good" results.

However improper values shall be fixed to avoid potential bugs.  Simply
bypass voltage configuration if voltage range is not defined.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoscsi: ufs: Fix regulator load and icc-level configuration
Stanley Chu [Thu, 28 Mar 2019 09:16:25 +0000 (17:16 +0800)]
scsi: ufs: Fix regulator load and icc-level configuration

[ Upstream commit 0487fff76632ec023d394a05b82e87a971db8c03 ]

Currently if a regulator has "<name>-fixed-regulator" property in device
tree, it will skip current limit initialization.  This lead to a zero
"max_uA" value in struct ufs_vreg.

However, "regulator_set_load" operation shall be required on regulators
which have valid current limits, otherwise a zero "max_uA" set by
"regulator_set_load" may cause unexpected behavior when this regulator is
enabled or set as high power mode.

Similarly, in device's icc_level configuration flow, the target icc_level
shall be updated if regulator also has valid current limit, otherwise a
wrong icc_level will be calculated by zero "max_uA" and thus causes
unexpected results after it is written to device.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agobrcmfmac: fix Oops when bringing up interface during USB disconnect
Piotr Figiel [Wed, 13 Mar 2019 09:52:01 +0000 (09:52 +0000)]
brcmfmac: fix Oops when bringing up interface during USB disconnect

[ Upstream commit 24d413a31afaee9bbbf79226052c386b01780ce2 ]

Fix a race which leads to an Oops with NULL pointer dereference.  The
dereference is in brcmf_config_dongle() when cfg_to_ndev() attempts to get
net_device structure of interface with index 0 via if2bss mapping. This
shouldn't fail because of check for bus being ready in brcmf_netdev_open(),
but it's not synchronised with USB disconnect and there is a race: after
the check the bus can be marked down and the mapping for interface 0 may be
gone.

Solve this by modifying disconnect handling so that the removal of mapping
of ifidx to brcmf_if structure happens after netdev removal (which is
synchronous with brcmf_netdev_open() thanks to rtln being locked in
devinet_ioctl()). This assures brcmf_netdev_open() returns before the
mapping is removed during disconnect.

Unable to handle kernel NULL pointer dereference at virtual address 00000008
pgd = bcae2612
[00000008] *pgd=8be73831
Internal error: Oops: 17 [#1] PREEMPT SMP ARM
Modules linked in: brcmfmac brcmutil nf_log_ipv4 nf_log_common xt_LOG xt_limit
iptable_mangle xt_connmark xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6
nf_defrag_ipv4 iptable_filter ip_tables x_tables usb_f_mass_storage usb_f_rndis
u_ether usb_serial_simple usbserial cdc_acm smsc95xx usbnet ci_hdrc_imx ci_hdrc
usbmisc_imx ulpi 8250_exar 8250_pci 8250 8250_base libcomposite configfs
udc_core [last unloaded: brcmutil]
CPU: 2 PID: 24478 Comm: ifconfig Not tainted 4.19.23-00078-ga62866d-dirty #115
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
PC is at brcmf_cfg80211_up+0x94/0x29c [brcmfmac]
LR is at brcmf_cfg80211_up+0x8c/0x29c [brcmfmac]
pc : [<7f26a91c>]    lr : [<7f26a914>]    psr: a0070013
sp : eca99d28  ip : 00000000  fp : ee9c6c00
r10: 00000036  r9 : 00000000  r8 : ece4002c
r7 : edb5b800  r6 : 00000000  r5 : 80f08448  r4 : edb5b968
r3 : ffffffff  r2 : 00000000  r1 : 00000002  r0 : 00000000
Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 10c5387d  Table: 7ca0c04a  DAC: 00000051
Process ifconfig (pid: 24478, stack limit = 0xd9e85a0e)
Stack: (0xeca99d28 to 0xeca9a000)
9d20:                   00000000 80f873b0 0000000d 80f08448 eca99d68 50d45f32
9d40: 7f27de94 ece40000 80f08448 80f08448 7f27de94 ece4002c 00000000 00000036
9d60: ee9c6c00 7f27262c 00001002 50d45f32 ece40000 00000000 80f08448 80772008
9d80: 00000001 00001043 00001002 ece40000 00000000 50d45f32 ece40000 00000001
9da0: 80f08448 00001043 00001002 807723d0 00000000 50d45f32 80f08448 eca99e58
9dc0: 80f87113 50d45f32 80f08448 ece40000 ece40138 00001002 80f08448 00000000
9de0: 00000000 80772434 edbd5380 eca99e58 edbd5380 80f08448 ee9c6c0c 80805f70
9e00: 00000000 ede08e00 00008914 ece40000 00000014 ee9c6c0c 600c0013 00001043
9e20: 0208a8c0 ffffffff 00000000 50d45f32 eca98000 80f08448 7ee9fc38 00008914
9e40: 80f68e40 00000051 eca98000 00000036 00000003 80808b9c 6e616c77 00000030
9e60: 00000000 00000000 00001043 0208a8c0 ffffffff 00000000 80f08448 00000000
9e80: 00000000 816d8b20 600c0013 00000001 ede09320 801763d4 00000000 50d45f32
9ea0: eca98000 80f08448 7ee9fc38 50d45f32 00008914 80f08448 7ee9fc38 80f68e40
9ec0: ed531540 8074721c 00000800 00000001 00000000 6e616c77 00000030 00000000
9ee0: 00000000 00001002 0208a8c0 ffffffff 00000000 50d45f32 80f08448 7ee9fc38
9f00: ed531560 ec8fc900 80285a6c 80285138 edb910c0 00000000 ecd91008 ede08e00
9f20: 80f08448 00000000 00000000 816d8b20 600c0013 00000001 ede09320 801763d4
9f40: 00000000 50d45f32 00021000 edb91118 edb910c0 80f08448 01b29000 edb91118
9f60: eca99f7c 50d45f32 00021000 ec8fc900 00000003 ec8fc900 00008914 7ee9fc38
9f80: eca98000 00000036 00000003 80285a6c 00086364 7ee9fe1c 000000c3 00000036
9fa0: 801011c4 80101000 00086364 7ee9fe1c 00000003 00008914 7ee9fc38 00086364
9fc0: 00086364 7ee9fe1c 000000c3 00000036 0008630c 7ee9fe1c 7ee9fc38 00000003
9fe0: 000a42b8 7ee9fbd4 00019914 76e09acc 600c0010 00000003 00000000 00000000
[<7f26a91c>] (brcmf_cfg80211_up [brcmfmac]) from [<7f27262c>] (brcmf_netdev_open+0x74/0xe8 [brcmfmac])
[<7f27262c>] (brcmf_netdev_open [brcmfmac]) from [<80772008>] (__dev_open+0xcc/0x150)
[<80772008>] (__dev_open) from [<807723d0>] (__dev_change_flags+0x168/0x1b4)
[<807723d0>] (__dev_change_flags) from [<80772434>] (dev_change_flags+0x18/0x48)
[<80772434>] (dev_change_flags) from [<80805f70>] (devinet_ioctl+0x67c/0x79c)
[<80805f70>] (devinet_ioctl) from [<80808b9c>] (inet_ioctl+0x210/0x3d4)
[<80808b9c>] (inet_ioctl) from [<8074721c>] (sock_ioctl+0x350/0x524)
[<8074721c>] (sock_ioctl) from [<80285138>] (do_vfs_ioctl+0xb0/0x9b0)
[<80285138>] (do_vfs_ioctl) from [<80285a6c>] (ksys_ioctl+0x34/0x5c)
[<80285a6c>] (ksys_ioctl) from [<80101000>] (ret_fast_syscall+0x0/0x28)
Exception stack(0xeca99fa8 to 0xeca99ff0)
9fa0:                   00086364 7ee9fe1c 00000003 00008914 7ee9fc38 00086364
9fc0: 00086364 7ee9fe1c 000000c3 00000036 0008630c 7ee9fe1c 7ee9fc38 00000003
9fe0: 000a42b8 7ee9fbd4 00019914 76e09acc
Code: e5970328 eb002021 e1a02006 e3a01002 (e5909008)
---[ end trace 5cbac2333f3ac5df ]---

Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agobrcmfmac: fix race during disconnect when USB completion is in progress
Piotr Figiel [Fri, 8 Mar 2019 15:25:04 +0000 (15:25 +0000)]
brcmfmac: fix race during disconnect when USB completion is in progress

[ Upstream commit db3b9e2e1d58080d0754bdf9293dabf8c6491b67 ]

It was observed that rarely during USB disconnect happening shortly after
connect (before full initialization completes) usb_hub_wq would wait
forever for the dev_init_lock to be unlocked. dev_init_lock would remain
locked though because of infinite wait during usb_kill_urb:

[ 2730.656472] kworker/0:2     D    0   260      2 0x00000000
[ 2730.660700] Workqueue: events request_firmware_work_func
[ 2730.664807] [<809dca20>] (__schedule) from [<809dd164>] (schedule+0x4c/0xac)
[ 2730.670587] [<809dd164>] (schedule) from [<8069af44>] (usb_kill_urb+0xdc/0x114)
[ 2730.676815] [<8069af44>] (usb_kill_urb) from [<7f258b50>] (brcmf_usb_free_q+0x34/0xa8 [brcmfmac])
[ 2730.684833] [<7f258b50>] (brcmf_usb_free_q [brcmfmac]) from [<7f2517d4>] (brcmf_detach+0xa0/0xb8 [brcmfmac])
[ 2730.693557] [<7f2517d4>] (brcmf_detach [brcmfmac]) from [<7f251a34>] (brcmf_attach+0xac/0x3d8 [brcmfmac])
[ 2730.702094] [<7f251a34>] (brcmf_attach [brcmfmac]) from [<7f2587ac>] (brcmf_usb_probe_phase2+0x468/0x4a0 [brcmfmac])
[ 2730.711601] [<7f2587ac>] (brcmf_usb_probe_phase2 [brcmfmac]) from [<7f252888>] (brcmf_fw_request_done+0x194/0x220 [brcmfmac])
[ 2730.721795] [<7f252888>] (brcmf_fw_request_done [brcmfmac]) from [<805748e4>] (request_firmware_work_func+0x4c/0x88)
[ 2730.731125] [<805748e4>] (request_firmware_work_func) from [<80141474>] (process_one_work+0x228/0x808)
[ 2730.739223] [<80141474>] (process_one_work) from [<80141a80>] (worker_thread+0x2c/0x564)
[ 2730.746105] [<80141a80>] (worker_thread) from [<80147bcc>] (kthread+0x13c/0x16c)
[ 2730.752227] [<80147bcc>] (kthread) from [<801010b4>] (ret_from_fork+0x14/0x20)

[ 2733.099695] kworker/0:3     D    0  1065      2 0x00000000
[ 2733.103926] Workqueue: usb_hub_wq hub_event
[ 2733.106914] [<809dca20>] (__schedule) from [<809dd164>] (schedule+0x4c/0xac)
[ 2733.112693] [<809dd164>] (schedule) from [<809e2a8c>] (schedule_timeout+0x214/0x3e4)
[ 2733.119621] [<809e2a8c>] (schedule_timeout) from [<809dde2c>] (wait_for_common+0xc4/0x1c0)
[ 2733.126810] [<809dde2c>] (wait_for_common) from [<7f258d00>] (brcmf_usb_disconnect+0x1c/0x4c [brcmfmac])
[ 2733.135206] [<7f258d00>] (brcmf_usb_disconnect [brcmfmac]) from [<8069e0c8>] (usb_unbind_interface+0x5c/0x1e4)
[ 2733.143943] [<8069e0c8>] (usb_unbind_interface) from [<8056d3e8>] (device_release_driver_internal+0x164/0x1fc)
[ 2733.152769] [<8056d3e8>] (device_release_driver_internal) from [<8056c078>] (bus_remove_device+0xd0/0xfc)
[ 2733.161138] [<8056c078>] (bus_remove_device) from [<8056977c>] (device_del+0x11c/0x310)
[ 2733.167939] [<8056977c>] (device_del) from [<8069cba8>] (usb_disable_device+0xa0/0x1cc)
[ 2733.174743] [<8069cba8>] (usb_disable_device) from [<8069507c>] (usb_disconnect+0x74/0x1dc)
[ 2733.181823] [<8069507c>] (usb_disconnect) from [<80695e88>] (hub_event+0x478/0xf88)
[ 2733.188278] [<80695e88>] (hub_event) from [<80141474>] (process_one_work+0x228/0x808)
[ 2733.194905] [<80141474>] (process_one_work) from [<80141a80>] (worker_thread+0x2c/0x564)
[ 2733.201724] [<80141a80>] (worker_thread) from [<80147bcc>] (kthread+0x13c/0x16c)
[ 2733.207913] [<80147bcc>] (kthread) from [<801010b4>] (ret_from_fork+0x14/0x20)

It was traced down to a case where usb_kill_urb would be called on an URB
structure containing more or less random data, including large number in
its use_count. During the debugging it appeared that in brcmf_usb_free_q()
the traversal over URBs' lists is not synchronized with operations on those
lists in brcmf_usb_rx_complete() leading to handling
brcmf_usbdev_info structure (holding lists' head) as lists' element and in
result causing above problem.

Fix it by walking through all URBs during brcmf_cancel_all_urbs using the
arrays of requests instead of linked lists.

Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agobrcmfmac: convert dev_init_lock mutex to completion
Piotr Figiel [Wed, 13 Mar 2019 09:52:42 +0000 (09:52 +0000)]
brcmfmac: convert dev_init_lock mutex to completion

[ Upstream commit a9fd0953fa4a62887306be28641b4b0809f3b2fd ]

Leaving dev_init_lock mutex locked in probe causes BUG and a WARNING when
kernel is compiled with CONFIG_PROVE_LOCKING. Convert mutex to completion
which silences those warnings and improves code readability.

Fix below errors when connecting the USB WiFi dongle:

brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43143 for chip BCM43143/2
BUG: workqueue leaked lock or atomic: kworker/0:2/0x00000000/434
     last function: hub_event
1 lock held by kworker/0:2/434:
 #0: 18d5dcdf (&devinfo->dev_init_lock){+.+.}, at: brcmf_usb_probe+0x78/0x550 [brcmfmac]
CPU: 0 PID: 434 Comm: kworker/0:2 Not tainted 4.19.23-00084-g454a789-dirty #123
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
Workqueue: usb_hub_wq hub_event
[<8011237c>] (unwind_backtrace) from [<8010d74c>] (show_stack+0x10/0x14)
[<8010d74c>] (show_stack) from [<809c4324>] (dump_stack+0xa8/0xd4)
[<809c4324>] (dump_stack) from [<8014195c>] (process_one_work+0x710/0x808)
[<8014195c>] (process_one_work) from [<80141a80>] (worker_thread+0x2c/0x564)
[<80141a80>] (worker_thread) from [<80147bcc>] (kthread+0x13c/0x16c)
[<80147bcc>] (kthread) from [<801010b4>] (ret_from_fork+0x14/0x20)
Exception stack(0xed1d9fb0 to 0xed1d9ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000

======================================================
WARNING: possible circular locking dependency detected
4.19.23-00084-g454a789-dirty #123 Not tainted
------------------------------------------------------
kworker/0:2/434 is trying to acquire lock:
e29cf799 ((wq_completion)"events"){+.+.}, at: process_one_work+0x174/0x808

but task is already holding lock:
18d5dcdf (&devinfo->dev_init_lock){+.+.}, at: brcmf_usb_probe+0x78/0x550 [brcmfmac]

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #2 (&devinfo->dev_init_lock){+.+.}:
       mutex_lock_nested+0x1c/0x24
       brcmf_usb_probe+0x78/0x550 [brcmfmac]
       usb_probe_interface+0xc0/0x1bc
       really_probe+0x228/0x2c0
       __driver_attach+0xe4/0xe8
       bus_for_each_dev+0x68/0xb4
       bus_add_driver+0x19c/0x214
       driver_register+0x78/0x110
       usb_register_driver+0x84/0x148
       process_one_work+0x228/0x808
       worker_thread+0x2c/0x564
       kthread+0x13c/0x16c
       ret_from_fork+0x14/0x20
         (null)

-> #1 (brcmf_driver_work){+.+.}:
       worker_thread+0x2c/0x564
       kthread+0x13c/0x16c
       ret_from_fork+0x14/0x20
         (null)

-> #0 ((wq_completion)"events"){+.+.}:
       process_one_work+0x1b8/0x808
       worker_thread+0x2c/0x564
       kthread+0x13c/0x16c
       ret_from_fork+0x14/0x20
         (null)

other info that might help us debug this:

Chain exists of:
  (wq_completion)"events" --> brcmf_driver_work --> &devinfo->dev_init_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&devinfo->dev_init_lock);
                               lock(brcmf_driver_work);
                               lock(&devinfo->dev_init_lock);
  lock((wq_completion)"events");

 *** DEADLOCK ***

1 lock held by kworker/0:2/434:
 #0: 18d5dcdf (&devinfo->dev_init_lock){+.+.}, at: brcmf_usb_probe+0x78/0x550 [brcmfmac]

stack backtrace:
CPU: 0 PID: 434 Comm: kworker/0:2 Not tainted 4.19.23-00084-g454a789-dirty #123
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
Workqueue: events request_firmware_work_func
[<8011237c>] (unwind_backtrace) from [<8010d74c>] (show_stack+0x10/0x14)
[<8010d74c>] (show_stack) from [<809c4324>] (dump_stack+0xa8/0xd4)
[<809c4324>] (dump_stack) from [<80172838>] (print_circular_bug+0x210/0x330)
[<80172838>] (print_circular_bug) from [<80175940>] (__lock_acquire+0x160c/0x1a30)
[<80175940>] (__lock_acquire) from [<8017671c>] (lock_acquire+0xe0/0x268)
[<8017671c>] (lock_acquire) from [<80141404>] (process_one_work+0x1b8/0x808)
[<80141404>] (process_one_work) from [<80141a80>] (worker_thread+0x2c/0x564)
[<80141a80>] (worker_thread) from [<80147bcc>] (kthread+0x13c/0x16c)
[<80147bcc>] (kthread) from [<801010b4>] (ret_from_fork+0x14/0x20)
Exception stack(0xed1d9fb0 to 0xed1d9ff8)
9fa0:                                     00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000

Signed-off-by: Piotr Figiel <p.figiel@camlintechnologies.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agob43: shut up clang -Wuninitialized variable warning
Arnd Bergmann [Fri, 22 Mar 2019 14:37:02 +0000 (15:37 +0100)]
b43: shut up clang -Wuninitialized variable warning

[ Upstream commit d825db346270dbceef83b7b750dbc29f1d7dcc0e ]

Clang warns about what is clearly a case of passing an uninitalized
variable into a static function:

drivers/net/wireless/broadcom/b43/phy_lp.c:1852:23: error: variable 'gains' is uninitialized when used here
      [-Werror,-Wuninitialized]
                lpphy_papd_cal(dev, gains, 0, 1, 30);
                                    ^~~~~
drivers/net/wireless/broadcom/b43/phy_lp.c:1838:2: note: variable 'gains' is declared here
        struct lpphy_tx_gains gains, oldgains;
        ^
1 error generated.

However, this function is empty, and its arguments are never evaluated,
so gcc in contrast does not warn here. Both compilers behave in a
reasonable way as far as I can tell, so we should change the code
to avoid the warning everywhere.

We could just eliminate the lpphy_papd_cal() function entirely,
given that it has had the TODO comment in it for 10 years now
and is rather unlikely to ever get done. I'm doing a simpler
change here, and just pass the 'oldgains' variable in that has
been initialized, based on the guess that this is what was
originally meant.

Fixes: 2c0d6100da3e ("b43: LP-PHY: Begin implementing calibration & software RFKILL support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agobrcmfmac: fix missing checks for kmemdup
Kangjie Lu [Fri, 15 Mar 2019 17:04:32 +0000 (12:04 -0500)]
brcmfmac: fix missing checks for kmemdup

[ Upstream commit 46953f97224d56a12ccbe9c6acaa84ca0dab2780 ]

In case kmemdup fails, the fix sets conn_info->req_ie_len and
conn_info->resp_ie_len to zero to avoid buffer overflows.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agomwifiex: Fix mem leak in mwifiex_tm_cmd
YueHaibing [Tue, 12 Mar 2019 07:03:58 +0000 (15:03 +0800)]
mwifiex: Fix mem leak in mwifiex_tm_cmd

[ Upstream commit 003b686ace820ce2d635a83f10f2d7f9c147dabc ]

'hostcmd' is alloced by kzalloc, should be freed before
leaving from the error handling cases, otherwise it will
cause mem leak.

Fixes: 3935ccc14d2c ("mwifiex: add cfg80211 testmode support")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agortlwifi: fix a potential NULL pointer dereference
Kangjie Lu [Tue, 12 Mar 2019 07:56:33 +0000 (02:56 -0500)]
rtlwifi: fix a potential NULL pointer dereference

[ Upstream commit 765976285a8c8db3f0eb7f033829a899d0c2786e ]

In case alloc_workqueue fails, the fix reports the error and
returns to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoiio: common: ssp_sensors: Initialize calculated_time in ssp_common_process_data
Nathan Chancellor [Thu, 7 Mar 2019 21:45:46 +0000 (14:45 -0700)]
iio: common: ssp_sensors: Initialize calculated_time in ssp_common_process_data

[ Upstream commit 6f9ca1d3eb74b81f811a87002de2d51640d135b1 ]

When building with -Wsometimes-uninitialized, Clang warns:

drivers/iio/common/ssp_sensors/ssp_iio.c:95:6: warning: variable
'calculated_time' is used uninitialized whenever 'if' condition is false
[-Wsometimes-uninitialized]

While it isn't wrong, this will never be a problem because
iio_push_to_buffers_with_timestamp only uses calculated_time
on the same condition that it is assigned (when scan_timestamp
is not zero). While iio_push_to_buffers_with_timestamp is marked
as inline, Clang does inlining in the optimization stage, which
happens after the semantic analysis phase (plus inline is merely
a hint to the compiler).

Fix this by just zero initializing calculated_time.

Link: https://github.com/ClangBuiltLinux/linux/issues/394
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoiio: hmc5843: fix potential NULL pointer dereferences
Kangjie Lu [Sat, 16 Mar 2019 22:08:33 +0000 (17:08 -0500)]
iio: hmc5843: fix potential NULL pointer dereferences

[ Upstream commit 536cc27deade8f1ec3c1beefa60d5fbe0f6fcb28 ]

devm_regmap_init_i2c may fail and return NULL. The fix returns
the error when it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoiio: ad_sigma_delta: Properly handle SPI bus locking vs CS assertion
Lars-Peter Clausen [Tue, 19 Mar 2019 11:37:55 +0000 (13:37 +0200)]
iio: ad_sigma_delta: Properly handle SPI bus locking vs CS assertion

[ Upstream commit df1d80aee963480c5c2938c64ec0ac3e4a0df2e0 ]

For devices from the SigmaDelta family we need to keep CS low when doing a
conversion, since the device will use the MISO line as a interrupt to
indicate that the conversion is complete.

This is why the driver locks the SPI bus and when the SPI bus is locked
keeps as long as a conversion is going on. The current implementation gets
one small detail wrong though. CS is only de-asserted after the SPI bus is
unlocked. This means it is possible for a different SPI device on the same
bus to send a message which would be wrongfully be addressed to the
SigmaDelta device as well. Make sure that the last SPI transfer that is
done while holding the SPI bus lock de-asserts the CS signal.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <Alexandru.Ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agox86/build: Keep local relocations with ld.lld
Kees Cook [Thu, 4 Apr 2019 21:40:27 +0000 (14:40 -0700)]
x86/build: Keep local relocations with ld.lld

[ Upstream commit 7c21383f3429dd70da39c0c7f1efa12377a47ab6 ]

The LLVM linker (ld.lld) defaults to removing local relocations, which
causes KASLR boot failures. ld.bfd and ld.gold already handle this
correctly. This adds the explicit instruction "--discard-none" during
the link phase. There is no change in output for ld.bfd and ld.gold,
but ld.lld now produces an image with all the needed relocations.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: clang-built-linux@googlegroups.com
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190404214027.GA7324@beast
Link: https://github.com/ClangBuiltLinux/linux/issues/404
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocpufreq: pmac32: fix possible object reference leak
Wen Yang [Mon, 1 Apr 2019 01:37:53 +0000 (09:37 +0800)]
cpufreq: pmac32: fix possible object reference leak

[ Upstream commit 8d10dc28a9ea6e8c02e825dab28699f3c72b02d9 ]

The call to of_find_node_by_name returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/cpufreq/pmac32-cpufreq.c:557:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 552, but without a corresponding object release within this function.
./drivers/cpufreq/pmac32-cpufreq.c:569:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 552, but without a corresponding object release within this function.
./drivers/cpufreq/pmac32-cpufreq.c:598:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 587, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-pm@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocpufreq/pasemi: fix possible object reference leak
Wen Yang [Mon, 1 Apr 2019 01:37:52 +0000 (09:37 +0800)]
cpufreq/pasemi: fix possible object reference leak

[ Upstream commit a9acc26b75f652f697e02a9febe2ab0da648a571 ]

The call to of_get_cpu_node returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/cpufreq/pasemi-cpufreq.c:212:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 147, but without a corresponding object release within this function.
./drivers/cpufreq/pasemi-cpufreq.c:220:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 147, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agocpufreq: ppc_cbe: fix possible object reference leak
Wen Yang [Mon, 1 Apr 2019 01:37:54 +0000 (09:37 +0800)]
cpufreq: ppc_cbe: fix possible object reference leak

[ Upstream commit 233298032803f2802fe99892d0de4ab653bfece4 ]

The call to of_get_cpu_node returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/cpufreq/ppc_cbe_cpufreq.c:89:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 76, but without a corresponding object release within this function.
./drivers/cpufreq/ppc_cbe_cpufreq.c:89:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 76, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agos390: cio: fix cio_irb declaration
Arnd Bergmann [Mon, 8 Apr 2019 21:26:20 +0000 (23:26 +0200)]
s390: cio: fix cio_irb declaration

[ Upstream commit e91012ee855ad9f5ef2ab106a3de51db93fe4d0c ]

clang points out that the declaration of cio_irb does not match the
definition exactly, it is missing the alignment attribute:

../drivers/s390/cio/cio.c:50:1: warning: section does not match previous declaration [-Wsection]
DEFINE_PER_CPU_ALIGNED(struct irb, cio_irb);
^
../include/linux/percpu-defs.h:150:2: note: expanded from macro 'DEFINE_PER_CPU_ALIGNED'
        DEFINE_PER_CPU_SECTION(type, name, PER_CPU_ALIGNED_SECTION)     \
        ^
../include/linux/percpu-defs.h:93:9: note: expanded from macro 'DEFINE_PER_CPU_SECTION'
        extern __PCPU_ATTRS(sec) __typeof__(type) name;                 \
               ^
../include/linux/percpu-defs.h:49:26: note: expanded from macro '__PCPU_ATTRS'
        __percpu __attribute__((section(PER_CPU_BASE_SECTION sec)))     \
                                ^
../drivers/s390/cio/cio.h:118:1: note: previous attribute is here
DECLARE_PER_CPU(struct irb, cio_irb);
^
../include/linux/percpu-defs.h:111:2: note: expanded from macro 'DECLARE_PER_CPU'
        DECLARE_PER_CPU_SECTION(type, name, "")
        ^
../include/linux/percpu-defs.h:87:9: note: expanded from macro 'DECLARE_PER_CPU_SECTION'
        extern __PCPU_ATTRS(sec) __typeof__(type) name
               ^
../include/linux/percpu-defs.h:49:26: note: expanded from macro '__PCPU_ATTRS'
        __percpu __attribute__((section(PER_CPU_BASE_SECTION sec)))     \
                                ^
Use DECLARE_PER_CPU_ALIGNED() here, to make the two match.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoextcon: arizona: Disable mic detect if running when driver is removed
Charles Keepax [Thu, 4 Apr 2019 16:33:56 +0000 (17:33 +0100)]
extcon: arizona: Disable mic detect if running when driver is removed

[ Upstream commit 00053de52231117ddc154042549f2256183ffb86 ]

Microphone detection provides the button detection features on the
Arizona CODECs as such it will be running if the jack is currently
inserted. If the driver is unbound whilst the jack is still inserted
this will cause warnings from the regulator framework as the MICVDD
regulator is put but was never disabled.

Correct this by disabling microphone detection on driver removal and if
the microphone detection was running disable the regulator and put the
runtime reference that was currently held.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agoPM / core: Propagate dev->power.wakeup_path when no callbacks
Ulf Hansson [Wed, 10 Apr 2019 09:55:16 +0000 (11:55 +0200)]
PM / core: Propagate dev->power.wakeup_path when no callbacks

[ Upstream commit dc351d4c5f4fe4d0f274d6d660227be0c3a03317 ]

The dev->power.direct_complete flag may become set in device_prepare() in
case the device don't have any PM callbacks (dev->power.no_pm_callbacks is
set). This leads to a broken behaviour, when there is child having wakeup
enabled and relies on its parent to be used in the wakeup path.

More precisely, when the direct complete path becomes selected for the
child in __device_suspend(), the propagation of the dev->power.wakeup_path
becomes skipped as well.

Let's address this problem, by checking if the device is a part the wakeup
path or has wakeup enabled, then prevent the direct complete path from
being used.

Reported-by: Loic Pallardy <loic.pallardy@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[ rjw: Comment cleanup ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5 years agommc: sdhci-of-esdhc: add erratum eSDHC-A001 and A-008358 support
Yinbo Zhu [Mon, 11 Mar 2019 02:16:40 +0000 (02:16 +0000)]
mmc: sdhci-of-esdhc: add erratum eSDHC-A001 and A-008358 support

[ Upstream commit 05cb6b2a66fa7837211a060878e91be5eb10cb07 ]

eSDHC-A001: The data timeout counter (SYSCTL[DTOCV]) is not
reliable for DTOCV values 0x4(2^17 SD clock), 0x8(2^21 SD clock),
and 0xC(2^25 SD clock). The data timeout counter can count from
2^13–2^27, but for values 2^17, 2^21, and 2^25, the timeout
counter counts for only 2^13 SD clocks.
A-008358: The data timeout counter value loaded into the timeout
counter is less than expected and can result into early timeout
error in case of eSDHC data transactions. The table below shows
the expected vs actual timeout period for different values of
SYSCTL[DTOCV]:
these two erratum has the same quirk to control it, and set
SDHCI_QUIRK_RESET_AFTER_REQUEST to fix above issue.

Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>