Andrey Utkin [Sat, 22 Oct 2016 15:34:36 +0000 (13:34 -0200)]
media: solo6x10: fix lockup by avoiding delayed register write
commit
5fc4b067ec082c3127e0156f800769b7e0dce078 upstream.
This fixes a lockup at device probing which happens on some solo6010
hardware samples. This is a regression introduced by commit
e1ceb25a1569
("[media] SOLO6x10: remove unneeded register locking and barriers")
The observed lockup happens in solo_set_motion_threshold() called from
solo_motion_config().
This extra "flushing" is not fundamentally needed for every write, but
apparently the code in driver assumes such behaviour at last in some
places.
Actual fix was proposed by Hans Verkuil.
Fixes:
e1ceb25a1569 ("[media] SOLO6x10: remove unneeded register locking and barriers")
Signed-off-by: Andrey Utkin <andrey.utkin@corp.bluecherry.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bart Van Assche [Mon, 19 Dec 2016 17:00:05 +0000 (18:00 +0100)]
IB/cma: Fix a race condition in iboe_addr_get_sgid()
commit
fba332b079029c2f4f7e84c1c1cd8e3867310c90 upstream.
Code that dereferences the struct net_device ip_ptr member must be
protected with an in_dev_get() / in_dev_put() pair. Hence insert
calls to these functions.
Fixes: commit
7b85627b9f02 ("IB/cma: IBoE (RoCE) IP-based GID addressing")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bart Van Assche [Mon, 21 Nov 2016 18:22:17 +0000 (10:22 -0800)]
IB/multicast: Check ib_find_pkey() return value
commit
d3a2418ee36a59bc02e9d454723f3175dcf4bfd9 upstream.
This patch avoids that Coverity complains about not checking the
ib_find_pkey() return value.
Fixes: commit
547af76521b3 ("IB/multicast: Report errors on multicast groups if P_key changes")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bart Van Assche [Mon, 21 Nov 2016 18:21:41 +0000 (10:21 -0800)]
IPoIB: Avoid reading an uninitialized member variable
commit
11b642b84e8c43e8597de031678d15c08dd057bc upstream.
This patch avoids that Coverity reports the following:
Using uninitialized value port_attr.state when calling printk
Fixes: commit
94232d9ce817 ("IPoIB: Start multicast join process only on active ports")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bart Van Assche [Mon, 21 Nov 2016 18:21:17 +0000 (10:21 -0800)]
IB/mad: Fix an array index check
commit
2fe2f378dd45847d2643638c07a7658822087836 upstream.
The array ib_mad_mgmt_class_table.method_table has MAX_MGMT_CLASS
(80) elements. Hence compare the array index with that value instead
of with IB_MGMT_MAX_METHODS (128). This patch avoids that Coverity
reports the following:
Overrunning array class->method_table of 80 8-byte elements at element index 127 (byte offset 1016) using index convert_mgmt_class(mad_hdr->mgmt_class) (which evaluates to 127).
Fixes: commit
b7ab0b19a85f ("IB/mad: Verify mgmt class in received MADs")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steven Rostedt (Red Hat) [Fri, 9 Dec 2016 01:54:49 +0000 (20:54 -0500)]
fgraph: Handle a case where a tracer ignores set_graph_notrace
commit
794de08a16cf1fc1bf785dc48f66d36218cf6d88 upstream.
Both the wakeup and irqsoff tracers can use the function graph tracer when
the display-graph option is set. The problem is that they ignore the notrace
file, and record the entry of functions that would be ignored by the
function_graph tracer. This causes the trace->depth to be recorded into the
ring buffer. The set_graph_notrace uses a trick by adding a large negative
number to the trace->depth when a graph function is to be ignored.
On trace output, the graph function uses the depth to record a stack of
functions. But since the depth is negative, it accesses the array with a
negative number and causes an out of bounds access that can cause a kernel
oops or corrupt data.
Have the print functions handle cases where a tracer still records functions
even when they are in set_graph_notrace.
Also add warnings if the depth is below zero before accessing the array.
Note, the function graph logic will still prevent the return of these
functions from being recorded, which means that they will be left hanging
without a return. For example:
# echo '*spin*' > set_graph_notrace
# echo 1 > options/display-graph
# echo wakeup > current_tracer
# cat trace
[...]
_raw_spin_lock() {
preempt_count_add() {
do_raw_spin_lock() {
update_rq_clock();
Where it should look like:
_raw_spin_lock() {
preempt_count_add();
do_raw_spin_lock();
}
update_rq_clock();
Cc: Namhyung Kim <namhyung.kim@lge.com>
Fixes:
29ad23b00474 ("ftrace: Add set_graph_notrace filter")
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Marcos Paulo de Souza [Wed, 30 Nov 2016 01:23:06 +0000 (23:23 -0200)]
platform/x86: asus-nb-wmi.c: Add X45U quirk
commit
e74e259939275a5dd4e0d02845c694f421e249ad upstream.
Without this patch, the Asus X45U wireless card can't be turned
on (hard-blocked), but after a suspend/resume it just starts working.
Following this bug report[1], there are other cases like this one, but
this Asus is the only model that I can test.
[1] https://ubuntuforums.org/showthread.php?t=
2181558
Signed-off-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steven Rostedt (Red Hat) [Thu, 8 Dec 2016 17:48:26 +0000 (12:48 -0500)]
ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it
commit
847fa1a6d3d00f3bdf68ef5fa4a786f644a0dd67 upstream.
With new binutils, gcc may get smart with its optimization and change a jmp
from a 5 byte jump to a 2 byte one even though it was jumping to a global
function. But that global function existed within a 2 byte radius, and gcc
was able to optimize it. Unfortunately, that jump was also being modified
when function graph tracing begins. Since ftrace expected that jump to be 5
bytes, but it was only two, it overwrote code after the jump, causing a
crash.
This was fixed for x86_64 with commit
8329e818f149, with the same subject as
this commit, but nothing was done for x86_32.
Fixes:
d61f82d06672 ("ftrace: use dynamic patching for updating mcount calls")
Reported-by: Colin Ian King <colin.king@canonical.com>
Tested-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jim Mattson [Mon, 12 Dec 2016 19:01:37 +0000 (11:01 -0800)]
kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF)
commit
ef85b67385436ddc1998f45f1d6a210f935b3388 upstream.
When L2 exits to L0 due to "exception or NMI", software exceptions
(#BP and #OF) for which L1 has requested an intercept should be
handled by L1 rather than L0. Previously, only hardware exceptions
were forwarded to L1.
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Mackerras [Wed, 16 Nov 2016 05:43:28 +0000 (16:43 +1100)]
KVM: PPC: Book3S HV: Don't lose hardware R/C bit updates in H_PROTECT
commit
f064a0de1579fabded8990bed93971e30deb9ecb upstream.
The hashed page table MMU in POWER processors can update the R
(reference) and C (change) bits in a HPTE at any time until the
HPTE has been invalidated and the TLB invalidation sequence has
completed. In kvmppc_h_protect, which implements the H_PROTECT
hypercall, we read the HPTE, modify the second doubleword,
invalidate the HPTE in memory, do the TLB invalidation sequence,
and then write the modified value of the second doubleword back
to memory. In doing so we could overwrite an R/C bit update done
by hardware between when we read the HPTE and when the TLB
invalidation completed. To fix this we re-read the second
doubleword after the TLB invalidation and OR in the (possibly)
new values of R and C. We can use an OR since hardware only ever
sets R and C, never clears them.
This race was found by code inspection. In principle this bug could
cause occasional guest memory corruption under host memory pressure.
Fixes:
a8606e20e41a ("KVM: PPC: Handle some PAPR hcalls in the kernel", 2011-06-29)
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Mackerras [Mon, 7 Nov 2016 04:09:58 +0000 (15:09 +1100)]
KVM: PPC: Book3S HV: Save/restore XER in checkpointed register state
commit
0d808df06a44200f52262b6eb72bcb6042f5a7c5 upstream.
When switching from/to a guest that has a transaction in progress,
we need to save/restore the checkpointed register state. Although
XER is part of the CPU state that gets checkpointed, the code that
does this saving and restoring doesn't save/restore XER.
This fixes it by saving and restoring the XER. To allow userspace
to read/write the checkpointed XER value, we also add a new ONE_REG
specifier.
The visible effect of this bug is that the guest may see its XER
value being corrupted when it uses transactions.
Fixes:
e4e38121507a ("KVM: PPC: Book3S HV: Add transactional memory support")
Fixes:
0a8eccefcb34 ("KVM: PPC: Book3S HV: Add missing code for transaction reclaim on guest exit")
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Konstantin Khlebnikov [Sun, 27 Nov 2016 16:32:32 +0000 (19:32 +0300)]
md/raid5: limit request size according to implementation limits
commit
e8d7c33232e5fdfa761c3416539bc5b4acd12db5 upstream.
Current implementation employ 16bit counter of active stripes in lower
bits of bio->bi_phys_segments. If request is big enough to overflow
this counter bio will be completed and freed too early.
Fortunately this not happens in default configuration because several
other limits prevent that: stripe_cache_size * nr_disks effectively
limits count of active stripes. And small max_sectors_kb at lower
disks prevent that during normal read/write operations.
Overflow easily happens in discard if it's enabled by module parameter
"devices_handle_discard_safely" and stripe_cache_size is set big enough.
This patch limits requests size with 256Mb - 8Kb to prevent overflows.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Shaohua Li <shli@kernel.org>
Cc: Neil Brown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josh Cartwright [Thu, 13 Oct 2016 15:44:33 +0000 (10:44 -0500)]
sc16is7xx: Drop bogus use of IRQF_ONESHOT
commit
04da73803c05dc1150ccc31cbf93e8cd56679c09 upstream.
The use of IRQF_ONESHOT when registering an interrupt handler with
request_irq() is non-sensical.
Not only that, it also prevents the handler from being threaded when it
otherwise should be w/ IRQ_FORCED_THREADING is enabled. This causes the
following deadlock observed by Sean Nyekjaer on -rt:
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[..]
rt_spin_lock_slowlock from queue_kthread_work
queue_kthread_work from sc16is7xx_irq
sc16is7xx_irq [sc16is7xx] from handle_irq_event_percpu
handle_irq_event_percpu from handle_irq_event
handle_irq_event from handle_level_irq
handle_level_irq from generic_handle_irq
generic_handle_irq from mxc_gpio_irq_handler
mxc_gpio_irq_handler from mx3_gpio_irq_handler
mx3_gpio_irq_handler from generic_handle_irq
generic_handle_irq from __handle_domain_irq
__handle_domain_irq from gic_handle_irq
gic_handle_irq from __irq_svc
__irq_svc from rt_spin_unlock
rt_spin_unlock from kthread_worker_fn
kthread_worker_fn from kthread
kthread from ret_from_fork
Fixes:
9e6f4ca3e567 ("sc16is7xx: use kthread_worker for tx_work and irq")
Reported-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Josh Cartwright <joshc@ni.com>
Cc: linux-rt-users@vger.kernel.org
Cc: Jakub Kicinski <moorray3@wp.pl>
Cc: linux-serial@vger.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Julia Cartwright <julia@ni.com>
Acked-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Gerald Schaefer [Mon, 21 Nov 2016 11:13:58 +0000 (12:13 +0100)]
s390/vmlogrdr: fix IUCV buffer allocation
commit
5457e03de918f7a3e294eb9d26a608ab8a579976 upstream.
The buffer for iucv_message_receive() needs to be below 2 GB. In
__iucv_message_receive(), the buffer address is casted to an u32, which
would result in either memory corruption or an addressing exception when
using addresses >= 2 GB.
Fix this by using GFP_DMA for the buffer allocation.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yves-Alexis Perez [Fri, 11 Nov 2016 19:28:40 +0000 (11:28 -0800)]
firmware: fix usermode helper fallback loading
commit
2e700f8d85975f516ccaad821278c1fe66b2cc98 upstream.
When you use the firmware usermode helper fallback with a timeout value set to a
value greater than INT_MAX (
2147483647) a cast overflow issue causes the
timeout value to go negative and breaks all usermode helper loading. This
regression was introduced through commit
68ff2a00dbf5 ("firmware_loader:
handle timeout via wait_for_completion_interruptible_timeout()") on kernel
v4.0.
The firmware_class drivers relies on the firmware usermode helper
fallback as a mechanism to look for firmware if the direct filesystem
search failed only if:
a) You've enabled CONFIG_FW_LOADER_USER_HELPER_FALLBACK (not many distros):
Then all of these callers will rely on the fallback mechanism in case
the firmware is not found through an initial direct filesystem lookup:
o request_firmware()
o request_firmware_into_buf()
o request_firmware_nowait()
b) If you've only enabled CONFIG_FW_LOADER_USER_HELPER (most distros):
Then only callers using request_firmware_nowait() with the second
argument set to false, this explicitly is requesting the UMH firmware
fallback to be relied on in case the first filesystem lookup fails.
Using Coccinelle SmPL grammar we have identified only two drivers
explicitly requesting the UMH firmware fallback mechanism:
- drivers/firmware/dell_rbu.c
- drivers/leds/leds-lp55xx-common.c
Since most distributions only enable CONFIG_FW_LOADER_USER_HELPER the
biggest impact of this regression are users of the dell_rbu and
leds-lp55xx-common device driver which required the UMH to find their
respective needed firmwares.
The default timeout for the UMH is set to 60 seconds always, as of
commit
68ff2a00dbf5 ("firmware_loader: handle timeout via
wait_for_completion_interruptible_timeout()") the timeout was bumped
to MAX_JIFFY_OFFSET ((LONG_MAX >> 1)-1). Additionally the MAX_JIFFY_OFFSET
value was also used if the timeout was configured by a user to 0.
The following works:
echo
2147483647 > /sys/class/firmware/timeout
But both of the following set the timeout to MAX_JIFFY_OFFSET even if
we display 0 back to userspace:
echo
2147483648 > /sys/class/firmware/timeout
cat /sys/class/firmware/timeout
0
echo 0> /sys/class/firmware/timeout
cat /sys/class/firmware/timeout
0
A max value of INT_MAX (
2147483647) seconds is therefore implicit due to the
another cast with simple_strtol().
This fixes the secondary cast (the first one is simple_strtol() but its an
issue only by forcing an implicit limit) by re-using the timeout variable and
only setting retval in appropriate cases.
Lastly worth noting systemd had ripped out the UMH firmware fallback
mechanism from udev since udev 2014 via commit
be2ea723b1d023b3d
("udev: remove userspace firmware loading support"), so as of systemd v217.
Signed-off-by: Yves-Alexis Perez <corsac@corsac.net>
Fixes:
68ff2a00dbf5 "firmware_loader: handle timeout via wait_for_completion_interruptible_timeout()"
Cc: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[mcgrof@kernel.org: gave commit log a whole lot of love]
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vineet Gupta [Mon, 19 Dec 2016 19:38:38 +0000 (11:38 -0800)]
ARC: mm: arc700: Don't assume 2 colours for aliasing VIPT dcache
commit
08fe007968b2b45e831daf74899f79a54d73f773 upstream.
An ARC700 customer reported linux boot crashes when upgrading to bigger
L1 dcache (64K from 32K). Turns out they had an aliasing VIPT config and
current code only assumed 2 colours, while theirs had 4. So default to 4
colours and complain if there are fewer. Ideally this needs to be a
Kconfig option, but heck that's too much of hassle for a single user.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wei Fang [Tue, 13 Dec 2016 01:25:21 +0000 (09:25 +0800)]
scsi: avoid a permanent stop of the scsi device's request queue
commit
d2a145252c52792bc59e4767b486b26c430af4bb upstream.
A race between scanning and fc_remote_port_delete() may result in a
permanent stop if the device gets blocked before scsi_sysfs_add_sdev()
and unblocked after. The reason is that blocking a device sets both the
SDEV_BLOCKED state and the QUEUE_FLAG_STOPPED. However,
scsi_sysfs_add_sdev() unconditionally sets SDEV_RUNNING which causes the
device to be ignored by scsi_target_unblock() and thus never have its
QUEUE_FLAG_STOPPED cleared leading to a device which is apparently
running but has a stopped queue.
We actually have two places where SDEV_RUNNING is set: once in
scsi_add_lun() which respects the blocked flag and once in
scsi_sysfs_add_sdev() which doesn't. Since the second set is entirely
spurious, simply remove it to fix the problem.
Reported-by: Zengxi Chen <chenzengxi@huawei.com>
Signed-off-by: Wei Fang <fangwei1@huawei.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steffen Maier [Fri, 9 Dec 2016 16:16:33 +0000 (17:16 +0100)]
scsi: zfcp: fix rport unblock race with LUN recovery
commit
6f2ce1c6af37191640ee3ff6e8fc39ea10352f4c upstream.
It is unavoidable that zfcp_scsi_queuecommand() has to finish requests
with DID_IMM_RETRY (like fc_remote_port_chkready()) during the time
window when zfcp detected an unavailable rport but
fc_remote_port_delete(), which is asynchronous via
zfcp_scsi_schedule_rport_block(), has not yet blocked the rport.
However, for the case when the rport becomes available again, we should
prevent unblocking the rport too early. In contrast to other FCP LLDDs,
zfcp has to open each LUN with the FCP channel hardware before it can
send I/O to a LUN. So if a port already has LUNs attached and we
unblock the rport just after port recovery, recoveries of LUNs behind
this port can still be pending which in turn force
zfcp_scsi_queuecommand() to unnecessarily finish requests with
DID_IMM_RETRY.
This also opens a time window with unblocked rport (until the followup
LUN reopen recovery has finished). If a scsi_cmnd timeout occurs during
this time window fc_timed_out() cannot work as desired and such command
would indeed time out and trigger scsi_eh. This prevents a clean and
timely path failover. This should not happen if the path issue can be
recovered on FC transport layer such as path issues involving RSCNs.
Fix this by only calling zfcp_scsi_schedule_rport_register(), to
asynchronously trigger fc_remote_port_add(), after all LUN recoveries as
children of the rport have finished and no new recoveries of equal or
higher order were triggered meanwhile. Finished intentionally includes
any recovery result no matter if successful or failed (still unblock
rport so other successful LUNs work). For simplicity, we check after
each finished LUN recovery if there is another LUN recovery pending on
the same port and then do nothing. We handle the special case of a
successful recovery of a port without LUN children the same way without
changing this case's semantics.
For debugging we introduce 2 new trace records written if the rport
unblock attempt was aborted due to still unfinished or freshly triggered
recovery. The records are only written above the default trace level.
Benjamin noticed the important special case of new recovery that can be
triggered between having given up the erp_lock and before calling
zfcp_erp_action_cleanup() within zfcp_erp_strategy(). We must avoid the
following sequence:
ERP thread rport_work other context
------------------------- -------------- --------------------------------
port is unblocked, rport still blocked,
due to pending/running ERP action,
so ((port->status & ...UNBLOCK) != 0)
and (port->rport == NULL)
unlock ERP
zfcp_erp_action_cleanup()
case ZFCP_ERP_ACTION_REOPEN_LUN:
zfcp_erp_try_rport_unblock()
((status & ...UNBLOCK) != 0) [OLD!]
zfcp_erp_port_reopen()
lock ERP
zfcp_erp_port_block()
port->status clear ...UNBLOCK
unlock ERP
zfcp_scsi_schedule_rport_block()
port->rport_task = RPORT_DEL
queue_work(rport_work)
zfcp_scsi_rport_work()
(port->rport_task != RPORT_ADD)
port->rport_task = RPORT_NONE
zfcp_scsi_rport_block()
if (!port->rport) return
zfcp_scsi_schedule_rport_register()
port->rport_task = RPORT_ADD
queue_work(rport_work)
zfcp_scsi_rport_work()
(port->rport_task == RPORT_ADD)
port->rport_task = RPORT_NONE
zfcp_scsi_rport_register()
(port->rport == NULL)
rport = fc_remote_port_add()
port->rport = rport;
Now the rport was erroneously unblocked while the zfcp_port is blocked.
This is another situation we want to avoid due to scsi_eh
potential. This state would at least remain until the new recovery from
the other context finished successfully, or potentially forever if it
failed. In order to close this race, we take the erp_lock inside
zfcp_erp_try_rport_unblock() when checking the status of zfcp_port or
LUN. With that, the possible corresponding rport state sequences would
be: (unblock[ERP thread],block[other context]) if the ERP thread gets
erp_lock first and still sees ((port->status & ...UNBLOCK) != 0),
(block[other context],NOP[ERP thread]) if the ERP thread gets erp_lock
after the other context has already cleard ...UNBLOCK from port->status.
Since checking fields of struct erp_action is unsafe because they could
have been overwritten (re-used for new recovery) meanwhile, we only
check status of zfcp_port and LUN since these are only changed under
erp_lock elsewhere. Regarding the check of the proper status flags (port
or port_forced are similar to the shown adapter recovery):
[zfcp_erp_adapter_shutdown()]
zfcp_erp_adapter_reopen()
zfcp_erp_adapter_block()
* clear UNBLOCK ---------------------------------------+
zfcp_scsi_schedule_rports_block() |
write_lock_irqsave(&adapter->erp_lock, flags);-------+ |
zfcp_erp_action_enqueue() | |
zfcp_erp_setup_act() | |
* set ERP_INUSE -----------------------------------|--|--+
write_unlock_irqrestore(&adapter->erp_lock, flags);--+ | |
.context-switch. | |
zfcp_erp_thread() | |
zfcp_erp_strategy() | |
write_lock_irqsave(&adapter->erp_lock, flags);------+ | |
... | | |
zfcp_erp_strategy_check_target() | | |
zfcp_erp_strategy_check_adapter() | | |
zfcp_erp_adapter_unblock() | | |
* set UNBLOCK -----------------------------------|--+ |
zfcp_erp_action_dequeue() | |
* clear ERP_INUSE ---------------------------------|-----+
... |
write_unlock_irqrestore(&adapter->erp_lock, flags);-+
Hence, we should check for both UNBLOCK and ERP_INUSE because they are
interleaved. Also we need to explicitly check ERP_FAILED for the link
down case which currently does not clear the UNBLOCK flag in
zfcp_fsf_link_down_info_eval().
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Fixes:
8830271c4819 ("[SCSI] zfcp: Dont fail SCSI commands when transitioning to blocked fc_rport")
Fixes:
a2fa0aede07c ("[SCSI] zfcp: Block FC transport rports early on errors")
Fixes:
5f852be9e11d ("[SCSI] zfcp: Fix deadlock between zfcp ERP and SCSI")
Fixes:
338151e06608 ("[SCSI] zfcp: make use of fc_remote_port_delete when target port is unavailable")
Fixes:
3859f6a248cb ("[PATCH] zfcp: add rports to enable scsi_add_device to work again")
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steffen Maier [Fri, 9 Dec 2016 16:16:32 +0000 (17:16 +0100)]
scsi: zfcp: do not trace pure benign residual HBA responses at default level
commit
56d23ed7adf3974f10e91b643bd230e9c65b5f79 upstream.
Since quite a while, Linux issues enough SCSI commands per scsi_device
which successfully return with FCP_RESID_UNDER, FSF_FCP_RSP_AVAILABLE,
and SAM_STAT_GOOD. This floods the HBA trace area and we cannot see
other and important HBA trace records long enough.
Therefore, do not trace HBA response errors for pure benign residual
under counts at the default trace level.
This excludes benign residual under count combined with other validity
bits set in FCP_RSP_IU, such as FCP_SNS_LEN_VAL. For all those other
cases, we still do want to see both the HBA record and the corresponding
SCSI record by default.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Fixes:
a54ca0f62f95 ("[SCSI] zfcp: Redesign of the debug tracing for HBA records.")
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Benjamin Block [Fri, 9 Dec 2016 16:16:31 +0000 (17:16 +0100)]
scsi: zfcp: fix use-after-"free" in FC ingress path after TMF
commit
dac37e15b7d511e026a9313c8c46794c144103cd upstream.
When SCSI EH invokes zFCP's callbacks for eh_device_reset_handler() and
eh_target_reset_handler(), it expects us to relent the ownership over
the given scsi_cmnd and all other scsi_cmnds within the same scope - LUN
or target - when returning with SUCCESS from the callback ('release'
them). SCSI EH can then reuse those commands.
We did not follow this rule to release commands upon SUCCESS; and if
later a reply arrived for one of those supposed to be released commands,
we would still make use of the scsi_cmnd in our ingress tasklet. This
will at least result in undefined behavior or a kernel panic because of
a wrong kernel pointer dereference.
To fix this, we NULLify all pointers to scsi_cmnds (struct zfcp_fsf_req
*)->data in the matching scope if a TMF was successful. This is done
under the locks (struct zfcp_adapter *)->abort_lock and (struct
zfcp_reqlist *)->lock to prevent the requests from being removed from
the request-hashtable, and the ingress tasklet from making use of the
scsi_cmnd-pointer in zfcp_fsf_fcp_cmnd_handler().
For cases where a reply arrives during SCSI EH, but before we get a
chance to NULLify the pointer - but before we return from the callback
-, we assume that the code is protected from races via the CAS operation
in blk_complete_request() that is called in scsi_done().
The following stacktrace shows an example for a crash resulting from the
previous behavior:
Unable to handle kernel pointer dereference at virtual kernel address
fffffee17a672000
Oops: 0038 [#1] SMP
CPU: 2 PID: 0 Comm: swapper/2 Not tainted
task:
00000003f7ff5be0 ti:
00000003f3d38000 task.ti:
00000003f3d38000
Krnl PSW :
0404d00180000000 00000000001156b0 (smp_vcpu_scheduled+0x18/0x40)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 EA:3
Krnl GPRS:
000000200000007e 0000000000000000 fffffee17a671fd8 0000000300000015
ffffffff80000000 00000000005dfde8 07000003f7f80e00 000000004fa4e800
000000036ce8d8f8 000000036ce8d9c0 00000003ece8fe00 ffffffff969c9e93
00000003fffffffd 000000036ce8da10 00000000003bf134 00000003f3b07918
Krnl Code:
00000000001156a2:
a7190000 lghi %r1,0
00000000001156a6:
a7380015 lhi %r3,21
#
00000000001156aa:
e32050000008 ag %r2,0(%r5)
>
00000000001156b0:
482022b0 lh %r2,688(%r2)
00000000001156b4:
ae123000 sigp %r1,%r2,0(%r3)
00000000001156b8:
b2220020 ipm %r2
00000000001156bc:
8820001c srl %r2,28
00000000001156c0:
c02700000001 xilf %r2,1
Call Trace:
([<
0000000000000000>] 0x0)
[<
000003ff807bdb8e>] zfcp_fsf_fcp_cmnd_handler+0x3de/0x490 [zfcp]
[<
000003ff807be30a>] zfcp_fsf_req_complete+0x252/0x800 [zfcp]
[<
000003ff807c0a48>] zfcp_fsf_reqid_check+0xe8/0x190 [zfcp]
[<
000003ff807c194e>] zfcp_qdio_int_resp+0x66/0x188 [zfcp]
[<
000003ff80440c64>] qdio_kick_handler+0xdc/0x310 [qdio]
[<
000003ff804463d0>] __tiqdio_inbound_processing+0xf8/0xcd8 [qdio]
[<
0000000000141fd4>] tasklet_action+0x9c/0x170
[<
0000000000141550>] __do_softirq+0xe8/0x258
[<
000000000010ce0a>] do_softirq+0xba/0xc0
[<
000000000014187c>] irq_exit+0xc4/0xe8
[<
000000000046b526>] do_IRQ+0x146/0x1d8
[<
00000000005d6a3c>] io_return+0x0/0x8
[<
00000000005d6422>] vtime_stop_cpu+0x4a/0xa0
([<
0000000000000000>] 0x0)
[<
0000000000103d8a>] arch_cpu_idle+0xa2/0xb0
[<
0000000000197f94>] cpu_startup_entry+0x13c/0x1f8
[<
0000000000114782>] smp_start_secondary+0xda/0xe8
[<
00000000005d6efe>] restart_int_handler+0x56/0x6c
[<
0000000000000000>] 0x0
Last Breaking-Event-Address:
[<
00000000003bf12e>] arch_spin_lock_wait+0x56/0xb0
Suggested-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Fixes:
ea127f9754 ("[PATCH] s390 (7/7): zfcp host adapter.") (tglx/history.git)
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kashyap Desai [Fri, 21 Oct 2016 13:33:35 +0000 (06:33 -0700)]
scsi: megaraid_sas: Do not set MPI2_TYPE_CUDA for JBOD FP path for FW which does not support JBOD sequence map
commit
d5573584429254a14708cf8375c47092b5edaf2c upstream.
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kashyap Desai [Fri, 21 Oct 2016 13:33:29 +0000 (06:33 -0700)]
scsi: megaraid_sas: For SRIOV enabled firmware, ensure VF driver waits for 30secs before reset
commit
18e1c7f68a5814442abad849abe6eacbf02ffd7c upstream.
For SRIOV enabled firmware, if there is a OCR(online controller reset)
possibility driver set the convert flag to 1, which is not happening if
there are outstanding commands even after 180 seconds. As driver does
not set convert flag to 1 and still making the OCR to run, VF(Virtual
function) driver is directly writing on to the register instead of
waiting for 30 seconds. Setting convert flag to 1 will cause VF driver
will wait for 30 secs before going for reset.
Signed-off-by: Kiran Kumar Kasturi <kiran-kumar.kasturi@broadcom.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Maciej S. Szmigiero [Tue, 15 Nov 2016 23:55:57 +0000 (00:55 +0100)]
vt: fix Scroll Lock LED trigger name
commit
31b5929d533f5183972cf57a7844b456ed996f3c upstream.
There is a disagreement between drivers/tty/vt/keyboard.c and
drivers/input/input-leds.c with regard to what is a Scroll Lock LED
trigger name: input calls it "kbd-scrolllock", but vt calls it
"kbd-scrollock" (two l's).
This prevents Scroll Lock LED trigger from binding to this LED by default.
Since it is a scroLL Lock LED, this interface was introduced only about a
year ago and in an Internet search people seem to reference this trigger
only to set it to this LED let's simply rename it to "kbd-scrolllock".
Also, it looks like this was supposed to be changed before this code was
merged: https://lkml.org/lkml/2015/6/9/697 but it was done only on
the input side.
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Acked-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rabin Vincent [Thu, 1 Dec 2016 08:18:28 +0000 (09:18 +0100)]
block: protect iterate_bdevs() against concurrent close
commit
af309226db916e2c6e08d3eba3fa5c34225200c4 upstream.
If a block device is closed while iterate_bdevs() is handling it, the
following NULL pointer dereference occurs because bdev->b_disk is NULL
in bdev_get_queue(), which is called from blk_get_backing_dev_info() (in
turn called by the mapping_cap_writeback_dirty() call in
__filemap_fdatawrite_range()):
BUG: unable to handle kernel NULL pointer dereference at
0000000000000508
IP: [<
ffffffff81314790>] blk_get_backing_dev_info+0x10/0x20
PGD
9e62067 PUD
9ee8067 PMD 0
Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
Modules linked in:
CPU: 1 PID: 2422 Comm: sync Not tainted 4.5.0-rc7+ #400
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
task:
ffff880009f4d700 ti:
ffff880009f5c000 task.ti:
ffff880009f5c000
RIP: 0010:[<
ffffffff81314790>] [<
ffffffff81314790>] blk_get_backing_dev_info+0x10/0x20
RSP: 0018:
ffff880009f5fe68 EFLAGS:
00010246
RAX:
0000000000000000 RBX:
ffff88000ec17a38 RCX:
ffffffff81a4e940
RDX:
7fffffffffffffff RSI:
0000000000000000 RDI:
ffff88000ec176c0
RBP:
ffff880009f5fe68 R08:
0000000000000000 R09:
0000000000000000
R10:
0000000000000001 R11:
0000000000000000 R12:
ffff88000ec17860
R13:
ffffffff811b25c0 R14:
ffff88000ec178e0 R15:
ffff88000ec17a38
FS:
00007faee505d700(0000) GS:
ffff88000fb00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
CR2:
0000000000000508 CR3:
0000000009e8a000 CR4:
00000000000006e0
Stack:
ffff880009f5feb8 ffffffff8112e7f5 0000000000000000 7fffffffffffffff
0000000000000000 0000000000000000 7fffffffffffffff 0000000000000001
ffff88000ec178e0 ffff88000ec17860 ffff880009f5fec8 ffffffff8112e81f
Call Trace:
[<
ffffffff8112e7f5>] __filemap_fdatawrite_range+0x85/0x90
[<
ffffffff8112e81f>] filemap_fdatawrite+0x1f/0x30
[<
ffffffff811b25d6>] fdatawrite_one_bdev+0x16/0x20
[<
ffffffff811bc402>] iterate_bdevs+0xf2/0x130
[<
ffffffff811b2763>] sys_sync+0x63/0x90
[<
ffffffff815d4272>] entry_SYSCALL_64_fastpath+0x12/0x76
Code: 0f 1f 44 00 00 48 8b 87 f0 00 00 00 55 48 89 e5 <48> 8b 80 08 05 00 00 5d
RIP [<
ffffffff81314790>] blk_get_backing_dev_info+0x10/0x20
RSP <
ffff880009f5fe68>
CR2:
0000000000000508
---[ end trace
2487336ceb3de62d ]---
The crash is easily reproducible by running the following command, if an
msleep(100) is inserted before the call to func() in iterate_devs():
while :; do head -c1 /dev/nullb0; done > /dev/null & while :; do sync; done
Fix it by holding the bd_mutex across the func() call and only calling
func() if the bdev is opened.
Fixes:
5c0d6b60a0ba ("vfs: Create function for iterating over block devices")
Reported-and-tested-by: Wei Fang <fangwei1@huawei.com>
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexander Usyskin [Thu, 24 Nov 2016 11:34:02 +0000 (13:34 +0200)]
mei: request async autosuspend at the end of enumeration
commit
d5f8e166c25750adc147b0adf64a62a91653438a upstream.
pm_runtime_autosuspend can take synchronous or asynchronous
paths, Because we are calling pm_runtime_mark_last_busy just before
this most of the cases it takes the asynchronous way. However,
when the FW or driver resets during already running runtime suspend,
the call will result in calling to the driver's rpm callback and results
in a deadlock on device_lock.
The simplest fix is to replace pm_runtime_autosuspend with
asynchronous pm_request_autosuspend.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Russell Currey [Thu, 15 Dec 2016 05:12:41 +0000 (16:12 +1100)]
drivers/gpu/drm/ast: Fix infinite loop if read fails
commit
298360af3dab45659810fdc51aba0c9f4097e4f6 upstream.
ast_get_dram_info() configures a window in order to access BMC memory.
A BMC register can be configured to disallow this, and if so, causes
an infinite loop in the ast driver which renders the system unusable.
Fix this by erroring out if an error is detected. On powerpc systems with
EEH, this leads to the device being fenced and the system continuing to
operate.
Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161215051241.20815-1-ruscur@russell.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Patrik Jakobsson [Tue, 1 Nov 2016 14:43:15 +0000 (15:43 +0100)]
drm/gma500: Add compat ioctl
commit
0a97c81a9717431e6c57ea845b59c3c345edce67 upstream.
Hook up drm_compat_ioctl to support 32-bit userspace on 64-bit kernels.
It turns out that N2600 and N2800 comes with 64-bit enabled. We
previously assumed there where no such systems out there.
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20161101144315.2955-1-patrik.r.jakobsson@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Fri, 2 Dec 2016 05:21:48 +0000 (00:21 -0500)]
drm/radeon: add additional pci revision to dpm workaround
commit
8729675c00a8d13cb2094d617d70a4a4da7d83c5 upstream.
New variant.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michel Dänzer [Thu, 27 Oct 2016 05:54:31 +0000 (14:54 +0900)]
drm/radeon: Hide the HW cursor while it's out of bounds
commit
6b16cf7785a4200b1bddf4f70c9dda2efc49e278 upstream.
Fixes hangs in that case under some circumstances.
v2:
* Only use non-0 x/yorigin if the cursor is (partially) outside of the
top/left edge of the total surface with AVIVO/DCE
Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=
1000433
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michel Dänzer [Thu, 27 Oct 2016 04:03:23 +0000 (13:03 +0900)]
drm/radeon: Also call cursor_move_locked when the cursor size changes
commit
dcab0fa64e300afa18f39cd98d05e0950f652adf upstream.
The cursor size also affects the register programming.
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Thu, 3 Nov 2016 06:37:33 +0000 (16:37 +1000)]
drm/nouveau/i2c/gk110b,gm10x: use the correct implementation
commit
5b3800a6b763874e4a23702fb9628d3bd3315ce9 upstream.
DPAUX registers moved on Kepler, these chipsets were still using the
Fermi implementation for some reason.
This fixes detection of hotplug/sink IRQs on DP connectors.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Sat, 5 Nov 2016 04:33:14 +0000 (14:33 +1000)]
drm/nouveau/fifo/gf100-: protect channel preempt with subdev mutex
commit
b27add13f500469127afdf011dbcc9c649e16e54 upstream.
This avoids an issue that occurs when we're attempting to preempt multiple
channels simultaneously. HW seems to ignore preempt requests while it's
still processing a previous one, which, well, makes sense.
Fixes random "fifo: SCHED_ERROR 0d []" + GPCCS page faults during parallel
piglit runs on (at least) GM107.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Mon, 12 Dec 2016 23:29:55 +0000 (09:29 +1000)]
drm/nouveau/ltc: protect clearing of comptags with mutex
commit
f4e65efc88b64c1dbca275d42a188edccedb56c6 upstream.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Fri, 14 Oct 2016 03:16:36 +0000 (13:16 +1000)]
drm/nouveau/bios: require checksum to match for fast acpi shadow method
commit
5dc7f4aa9d84ea94b54a9bfcef095f0289f1ebda upstream.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Wed, 19 Oct 2016 02:15:52 +0000 (12:15 +1000)]
drm/nouveau/kms: lvds panel strap moved again on maxwell
commit
768e847759d551c96e129e194588dbfb11a1d576 upstream.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hans de Goede [Tue, 29 Nov 2016 14:32:16 +0000 (15:32 +0100)]
ACPI / video: Add force_native quirk for HP Pavilion dv6
commit
6276e53fa8c06a3a5cf7b95b77b079966de9ad66 upstream.
The HP Pavilion dv6 has a non-working acpi_video0 backlight interface
and an intel_backlight interface which works fine. Add a force_native
quirk for it so that the non-working acpi_video0 interface does not get
registered.
Note that there are quite a few HP Pavilion dv6 variants, some
woth ATI and some with NVIDIA hybrid gfx, both seem to need this
quirk to have working backlight control. There are also some versions
with only Intel integrated gfx, these may not need this quirk, but it
should not hurt there.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1204476
Link: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1416940
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hans de Goede [Tue, 29 Nov 2016 14:32:15 +0000 (15:32 +0100)]
ACPI / video: Add force_native quirk for Dell XPS 17 L702X
commit
350fa038c31b056fc509624efb66348ac2c1e3d0 upstream.
The Dell XPS 17 L702X has a non-working acpi_video0 backlight interface
and an intel_backlight interface which works fine. Add a force_native
quirk for it so that the non-working acpi_video0 interface does not get
registered.
Note that there also is an issue with the brightnesskeys on this laptop,
they do not generate key-press events in anyway. That is not solved by
this patch.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1123661
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 14 Nov 2016 20:16:22 +0000 (20:16 +0000)]
staging: comedi: ni_mio_common: fix E series ni_ai_insn_read() data
commit
857a661020a2de3a0304edf33ad656abee100891 upstream.
Commit
0557344e2149 ("staging: comedi: ni_mio_common: fix local var for
32-bit read") changed the type of local variable `d` from `unsigned
short` to `unsigned int` to fix a bug introduced in
commit
9c340ac934db ("staging: comedi: ni_stc.h: add read/write
callbacks to struct ni_private") when reading AI data for NI PCI-6110
and PCI-6111 cards. Unfortunately, other parts of the function rely on
the variable being `unsigned short` when an offset value in local
variable `signbits` is added to `d` before writing the value to the
`data` array:
d += signbits;
data[n] = d;
The `signbits` variable will be non-zero in bipolar mode, and is used to
convert the hardware's 2's complement, 16-bit numbers to Comedi's
straight binary sample format (with 0 representing the most negative
voltage). This breaks because `d` is now 32 bits wide instead of 16
bits wide, so after the addition of `signbits`, `data[n]` ends up being
set to values above 65536 for negative voltages. This affects all
supported "E series" cards except PCI-6143 (and PXI-6143). Fix it by
ANDing the value written to the `data[n]` with the mask 0xffff.
Fixes:
0557344e2149 ("staging: comedi: ni_mio_common: fix local var for 32-bit read")
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ian Abbott [Mon, 14 Nov 2016 20:16:21 +0000 (20:16 +0000)]
staging: comedi: ni_mio_common: fix M Series ni_ai_insn_read() data mask
commit
655c4d442d1213b617926cc6d54e2a9a793fb46b upstream.
For NI M Series cards, the Comedi `insn_read` handler for the AI
subdevice is broken due to ANDing the value read from the AI FIFO data
register with an incorrect mask. The incorrect mask clears all but the
most significant bit of the sample data. It should preserve all the
sample data bits. Correct it.
Fixes:
817144ae7fda ("staging: comedi: ni_mio_common: remove unnecessary use of 'board->adbits'")
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Krzysztof Kozlowski [Tue, 22 Nov 2016 17:22:44 +0000 (19:22 +0200)]
thermal: hwmon: Properly report critical temperature in sysfs
commit
f37fabb8643eaf8e3b613333a72f683770c85eca upstream.
In the critical sysfs entry the thermal hwmon was returning wrong
temperature to the user-space. It was reporting the temperature of the
first trip point instead of the temperature of critical trip point.
For example:
/sys/class/hwmon/hwmon0/temp1_crit:50000
/sys/class/thermal/thermal_zone0/trip_point_0_temp:50000
/sys/class/thermal/thermal_zone0/trip_point_0_type:active
/sys/class/thermal/thermal_zone0/trip_point_3_temp:120000
/sys/class/thermal/thermal_zone0/trip_point_3_type:critical
Since commit
e68b16abd91d ("thermal: add hwmon sysfs I/F") the driver
have been registering a sysfs entry if get_crit_temp() callback was
provided. However when accessed, it was calling get_trip_temp() instead
of the get_crit_temp().
Fixes:
e68b16abd91d ("thermal: add hwmon sysfs I/F")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Boris Brezillon [Thu, 1 Dec 2016 19:27:21 +0000 (20:27 +0100)]
clk: bcm2835: Avoid overwriting the div info when disabling a pll_div clk
commit
68af4fa8f39b542a6cde7ac19518d88e9b3099dc upstream.
bcm2835_pll_divider_off() is resetting the divider field in the A2W reg
to zero when disabling the clock.
Make sure we preserve this value by reading the previous a2w_reg value
first and ORing the result with A2W_PLL_CHANNEL_DISABLE.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes:
41691b8862e2 ("clk: bcm2835: Add support for programming the audio domain clocks")
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Thomas Gleixner [Thu, 8 Dec 2016 20:49:32 +0000 (20:49 +0000)]
timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion
commit
9c1645727b8fa90d07256fdfcc45bf831242a3ab upstream.
The clocksource delta to nanoseconds conversion is using signed math, but
the delta is unsigned. This makes the conversion space smaller than
necessary and in case of a multiplication overflow the conversion can
become negative. The conversion is done with scaled math:
s64 nsec_delta = ((s64)clkdelta * clk->mult) >> clk->shift;
Shifting a signed integer right obvioulsy preserves the sign, which has
interesting consequences:
- Time jumps backwards
- __iter_div_u64_rem() which is used in one of the calling code pathes
will take forever to piecewise calculate the seconds/nanoseconds part.
This has been reported by several people with different scenarios:
David observed that when stopping a VM with a debugger:
"It was essentially the stopped by debugger case. I forget exactly why,
but the guest was being explicitly stopped from outside, it wasn't just
scheduling lag. I think it was something in the vicinity of 10 minutes
stopped."
When lifting the stop the machine went dead.
The stopped by debugger case is not really interesting, but nevertheless it
would be a good thing not to die completely.
But this was also observed on a live system by Liav:
"When the OS is too overloaded, delta will get a high enough value for the
msb of the sum delta * tkr->mult + tkr->xtime_nsec to be set, and so
after the shift the nsec variable will gain a value similar to
0xffffffffff000000."
Unfortunately this has been reintroduced recently with commit
6bd58f09e1d8
("time: Add cycles to nanoseconds translation"). It had been fixed a year
ago already in commit
35a4933a8959 ("time: Avoid signed overflow in
timekeeping_get_ns()").
Though it's not surprising that the issue has been reintroduced because the
function itself and the whole call chain uses s64 for the result and the
propagation of it. The change in this recent commit is subtle:
s64 nsec;
- nsec = (d * m + n) >> s:
+ nsec = d * m + n;
+ nsec >>= s;
d being type of cycle_t adds another level of obfuscation.
This wouldn't have happened if the previous change to unsigned computation
would have made the 'nsec' variable u64 right away and a follow up patch
had cleaned up the whole call chain.
There have been patches submitted which basically did a revert of the above
patch leaving everything else unchanged as signed. Back to square one. This
spawned a admittedly pointless discussion about potential users which rely
on the unsigned behaviour until someone pointed out that it had been fixed
before. The changelogs of said patches added further confusion as they made
finally false claims about the consequences for eventual users which expect
signed results.
Despite delta being cycle_t, aka. u64, it's very well possible to hand in
a signed negative value and the signed computation will happily return the
correct result. But nobody actually sat down and analyzed the code which
was added as user after the propably unintended signed conversion.
Though in sensitive code like this it's better to analyze it proper and
make sure that nothing relies on this than hunting the subtle wreckage half
a year later. After analyzing all call chains it stands that no caller can
hand in a negative value (which actually would work due to the s64 cast)
and rely on the signed math to do the right thing.
Change the conversion function to unsigned math. The conversion of all call
chains is done in a follow up patch.
This solves the starvation issue, which was caused by the negative result,
but it does not solve the underlying problem. It merily procrastinates
it. When the timekeeper update is deferred long enough that the unsigned
multiplication overflows, then time going backwards is observable again.
It does neither solve the issue of clocksources with a small counter width
which will wrap around possibly several times and cause random time stamps
to be generated. But those are usually not found on systems used for
virtualization, so this is likely a non issue.
I took the liberty to claim authorship for this simply because
analyzing all callsites and writing the changelog took substantially
more time than just making the simple s/s64/u64/ change and ignore the
rest.
Fixes:
6bd58f09e1d8 ("time: Add cycles to nanoseconds translation")
Reported-by: David Gibson <david@gibson.dropbear.id.au>
Reported-by: Liav Rehana <liavr@mellanox.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Parit Bhargava <prarit@redhat.com>
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: "Christopher S. Hall" <christopher.s.hall@intel.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20161208204228.688545601@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Walleij [Sat, 12 Nov 2016 14:22:38 +0000 (15:22 +0100)]
regulator: stw481x-vmmc: fix ages old enable error
commit
295070e9aa015abb9b92cccfbb1e43954e938133 upstream.
The regulator has never been properly enabled, it has been
dormant all the time. It's strange that MMC was working
at all, but it likely worked by the signals going through
the levelshifter and reaching the card anyways.
Fixes:
3615a34ea1a6 ("regulator: add STw481x VMMC driver")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Adrian Hunter [Fri, 2 Dec 2016 13:14:20 +0000 (15:14 +0200)]
mmc: sdhci: Fix recovery from tuning timeout
commit
61e53bd0047d58caee0c7170613045bf96de4458 upstream.
Clearing the tuning bits should reset the tuning circuit. However there is
more to do. Reset the command and data lines for good measure, and then
for eMMC ensure the card is not still trying to process a tuning command by
sending a stop command.
Note the JEDEC eMMC specification says the stop command (CMD12) can be used
to stop a tuning command (CMD21) whereas the SD specification is silent on
the subject with respect to the SD tuning command (CMD19). Considering that
CMD12 is not a valid SDIO command, the stop command is sent only when the
tuning command is CMD21 i.e. for eMMC. That addresses cases seen so far
which have been on eMMC.
Note that this replaces the commit
fe5fb2e3b58f ("mmc: sdhci: Reset cmd and
data circuits after tuning failure") which is being reverted for v4.9+.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Dan O'Donovan <dan@emutex.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vittorio Gambaletta (VittGam) [Wed, 9 Nov 2016 01:40:56 +0000 (03:40 +0200)]
ath9k: Really fix LED polarity for some Mini PCI AR9220 MB92 cards.
commit
79e57dd113d307a6c74773b8aaecf5442068988a upstream.
The active_high LED of my Wistron DNMA-92 is still being recognized as
active_low on 4.7.6 mainline. When I was preparing my former commit
0f9edcdd88a9 ("ath9k: Fix LED polarity for some Mini PCI AR9220 MB92
cards.") to fix that I must have somehow messed up with testing, because
I tested the final version of that patch before sending it, and it was
apparently working; but now it is not working on 4.7.6 mainline.
I initially added the PCI_DEVICE_SUB section for 0x0029/0x2096 above the
PCI_VDEVICE section for 0x0029; but then I moved the former below the
latter after seeing how 0x002A sections were sorted in the file.
This turned out to be wrong: if a generic PCI_VDEVICE entry (that has
both subvendor and subdevice IDs set to PCI_ANY_ID) is put before a more
specific one (PCI_DEVICE_SUB), then the generic PCI_VDEVICE entry will
match first and will be used.
With this patch, 0x0029/0x2096 has finally got active_high LED on 4.7.6.
While I'm at it, let's fix 0x002A too by also moving its generic definition
below its specific ones.
Fixes:
0f9edcdd88a9 ("ath9k: Fix LED polarity for some Mini PCI AR9220 MB92 cards.")
Signed-off-by: Vittorio Gambaletta <linuxbugs@vittgam.net>
[kvalo@qca.qualcomm.com: improve the commit log based on email discussions]
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johannes Berg [Thu, 8 Dec 2016 16:22:09 +0000 (17:22 +0100)]
cfg80211/mac80211: fix BSS leaks when abandoning assoc attempts
commit
e6f462df9acd2a3295e5d34eb29e2823220cf129 upstream.
When mac80211 abandons an association attempt, it may free
all the data structures, but inform cfg80211 and userspace
about it only by sending the deauth frame it received, in
which case cfg80211 has no link to the BSS struct that was
used and will not cfg80211_unhold_bss() it.
Fix this by providing a way to inform cfg80211 of this with
the BSS entry passed, so that it can clean up properly, and
use this ability in the appropriate places in mac80211.
This isn't ideal: some code is more or less duplicated and
tracing is missing. However, it's a fairly small change and
it's thus easier to backport - cleanups can come later.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Sat, 26 Nov 2016 20:43:35 +0000 (14:43 -0600)]
rtlwifi: Fix enter/exit power_save
commit
ba9f93f82abafe2552eac942ebb11c2df4f8dd7f upstream.
In commit
a5ffbe0a1993 ("rtlwifi: Fix scheduling while atomic bug") and
commit
a269913c52ad ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter()
to use work queue"), an error was introduced in the power-save routines
due to the fact that leaving PS was delayed by the use of a work queue.
This problem is fixed by detecting if the enter or leave routines are
in interrupt mode. If so, the workqueue is used to place the request.
If in normal mode, the enter or leave routines are called directly.
Fixes:
a269913c52ad ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue")
Reported-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Sat, 5 Nov 2016 19:08:57 +0000 (14:08 -0500)]
ssb: Fix error routine when fallback SPROM fails
commit
8052d7245b6089992343c80b38b14dbbd8354651 upstream.
When there is a CRC error in the SPROM read from the device, the code
attempts to handle a fallback SPROM. When this also fails, the driver
returns zero rather than an error code.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Fri, 6 Jan 2017 10:16:31 +0000 (11:16 +0100)]
Linux 4.4.40
WANG Cong [Wed, 6 Jul 2016 05:12:36 +0000 (22:12 -0700)]
ppp: defer netns reference release for ppp channel
commit
205e1e255c479f3fd77446415706463b282f94e4 upstream.
Matt reported that we have a NULL pointer dereference
in ppp_pernet() from ppp_connect_channel(),
i.e. pch->chan_net is NULL.
This is due to that a parallel ppp_unregister_channel()
could happen while we are in ppp_connect_channel(), during
which pch->chan_net set to NULL. Since we need a reference
to net per channel, it makes sense to sync the refcnt
with the life time of the channel, therefore we should
release this reference when we destroy it.
Fixes:
1f461dcdd296 ("ppp: take reference on channels netns")
Reported-by: Matt Bennett <Matt.Bennett@alliedtelesis.co.nz>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-ppp@vger.kernel.org
Cc: Guillaume Nault <g.nault@alphalink.fr>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: bmajal222 <bmajal222@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ming Lei [Sun, 10 Jul 2016 11:27:36 +0000 (19:27 +0800)]
driver core: fix race between creating/querying glue dir and its cleanup
commit
cebf8fd16900fdfd58c0028617944f808f97fe50 upstream.
The global mutex of 'gdp_mutex' is used to serialize creating/querying
glue dir and its cleanup. Turns out it isn't a perfect way because
part(kobj_kset_leave()) of the actual cleanup action() is done inside
the release handler of the glue dir kobject. That means gdp_mutex has
to be held before releasing the last reference count of the glue dir
kobject.
This patch moves glue dir's cleanup after kobject_del() in device_del()
for avoiding the race.
Cc: Yijing Wang <wangyijing@huawei.com>
Reported-by: Chandra Sekhar Lingutla <clingutla@codeaurora.org>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Sandeen [Mon, 5 Dec 2016 01:31:06 +0000 (12:31 +1100)]
xfs: set AGI buffer type in xlog_recover_clear_agi_bucket
commit
6b10b23ca94451fae153a5cc8d62fd721bec2019 upstream.
xlog_recover_clear_agi_bucket didn't set the
type to XFS_BLFT_AGI_BUF, so we got a warning during log
replay (or an ASSERT on a debug build).
XFS (md0): Unknown buffer type 0!
XFS (md0): _xfs_buf_ioapply: no ops on block 0xaea8802/0x1
Fix this, as was done in
f19b872b for 2 other locations
with the same problem.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Julien Grall [Wed, 7 Dec 2016 12:24:40 +0000 (12:24 +0000)]
arm/xen: Use alloc_percpu rather than __alloc_percpu
commit
24d5373dda7c00a438d26016bce140299fae675e upstream.
The function xen_guest_init is using __alloc_percpu with an alignment
which are not power of two.
However, the percpu allocator never supported alignments which are not power
of two and has always behaved incorectly in thise case.
Commit
3ca45a4 "percpu: ensure requested alignment is power of two"
introduced a check which trigger a warning [1] when booting linux-next
on Xen. But in reality this bug was always present.
This can be fixed by replacing the call to __alloc_percpu with
alloc_percpu. The latter will use an alignment which are a power of two.
[1]
[ 0.023921] illegal size (48) or align (48) for percpu allocation
[ 0.024167] ------------[ cut here ]------------
[ 0.024344] WARNING: CPU: 0 PID: 1 at linux/mm/percpu.c:892 pcpu_alloc+0x88/0x6c0
[ 0.024584] Modules linked in:
[ 0.024708]
[ 0.024804] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
4.9.0-rc7-next-
20161128 #473
[ 0.025012] Hardware name: Foundation-v8A (DT)
[ 0.025162] task:
ffff80003d870000 task.stack:
ffff80003d844000
[ 0.025351] PC is at pcpu_alloc+0x88/0x6c0
[ 0.025490] LR is at pcpu_alloc+0x88/0x6c0
[ 0.025624] pc : [<
ffff00000818e678>] lr : [<
ffff00000818e678>]
pstate:
60000045
[ 0.025830] sp :
ffff80003d847cd0
[ 0.025946] x29:
ffff80003d847cd0 x28:
0000000000000000
[ 0.026147] x27:
0000000000000000 x26:
0000000000000000
[ 0.026348] x25:
0000000000000000 x24:
0000000000000000
[ 0.026549] x23:
0000000000000000 x22:
00000000024000c0
[ 0.026752] x21:
ffff000008e97000 x20:
0000000000000000
[ 0.026953] x19:
0000000000000030 x18:
0000000000000010
[ 0.027155] x17:
0000000000000a3f x16:
00000000deadbeef
[ 0.027357] x15:
0000000000000006 x14:
ffff000088f79c3f
[ 0.027573] x13:
ffff000008f79c4d x12:
0000000000000041
[ 0.027782] x11:
0000000000000006 x10:
0000000000000042
[ 0.027995] x9 :
ffff80003d847a40 x8 :
6f697461636f6c6c
[ 0.028208] x7 :
6120757063726570 x6 :
ffff000008f79c84
[ 0.028419] x5 :
0000000000000005 x4 :
0000000000000000
[ 0.028628] x3 :
0000000000000000 x2 :
000000000000017f
[ 0.028840] x1 :
ffff80003d870000 x0 :
0000000000000035
[ 0.029056]
[ 0.029152] ---[ end trace
0000000000000000 ]---
[ 0.029297] Call trace:
[ 0.029403] Exception stack(0xffff80003d847b00 to
0xffff80003d847c30)
[ 0.029621] 7b00:
0000000000000030 0001000000000000
ffff80003d847cd0 ffff00000818e678
[ 0.029901] 7b20:
0000000000000002 0000000000000004
ffff000008f7c060 0000000000000035
[ 0.030153] 7b40:
ffff000008f79000 ffff000008c4cd88
ffff80003d847bf0 ffff000008101778
[ 0.030402] 7b60:
0000000000000030 0000000000000000
ffff000008e97000 00000000024000c0
[ 0.030647] 7b80:
0000000000000000 0000000000000000
0000000000000000 0000000000000000
[ 0.030895] 7ba0:
0000000000000035 ffff80003d870000
000000000000017f 0000000000000000
[ 0.031144] 7bc0:
0000000000000000 0000000000000005
ffff000008f79c84 6120757063726570
[ 0.031394] 7be0:
6f697461636f6c6c ffff80003d847a40
0000000000000042 0000000000000006
[ 0.031643] 7c00:
0000000000000041 ffff000008f79c4d
ffff000088f79c3f 0000000000000006
[ 0.031877] 7c20:
00000000deadbeef 0000000000000a3f
[ 0.032051] [<
ffff00000818e678>] pcpu_alloc+0x88/0x6c0
[ 0.032229] [<
ffff00000818ece8>] __alloc_percpu+0x18/0x20
[ 0.032409] [<
ffff000008d9606c>] xen_guest_init+0x174/0x2f4
[ 0.032591] [<
ffff0000080830f8>] do_one_initcall+0x38/0x130
[ 0.032783] [<
ffff000008d90c34>] kernel_init_freeable+0xe0/0x248
[ 0.032995] [<
ffff00000899a890>] kernel_init+0x10/0x100
[ 0.033172] [<
ffff000008082ec0>] ret_from_fork+0x10/0x50
Reported-by: Wei Chen <wei.chen@arm.com>
Link: https://lkml.org/lkml/2016/11/28/669
Signed-off-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Boris Ostrovsky [Mon, 21 Nov 2016 14:56:06 +0000 (09:56 -0500)]
xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing
commit
30faaafdfa0c754c91bac60f216c9f34a2bfdf7e upstream.
Commit
9c17d96500f7 ("xen/gntdev: Grant maps should not be subject to
NUMA balancing") set VM_IO flag to prevent grant maps from being
subjected to NUMA balancing.
It was discovered recently that this flag causes get_user_pages() to
always fail with -EFAULT.
check_vma_flags
__get_user_pages
__get_user_pages_locked
__get_user_pages_unlocked
get_user_pages_fast
iov_iter_get_pages
dio_refill_pages
do_direct_IO
do_blockdev_direct_IO
do_blockdev_direct_IO
ext4_direct_IO_read
generic_file_read_iter
aio_run_iocb
(which can happen if guest's vdisk has direct-io-safe option).
To avoid this let's use VM_MIXEDMAP flag instead --- it prevents
NUMA balancing just as VM_IO does and has no effect on
check_vma_flags().
Reported-by: Olaf Hering <olaf@aepfle.de>
Suggested-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Acked-by: Hugh Dickins <hughd@google.com>
Tested-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Gunthorpe [Wed, 26 Oct 2016 22:28:45 +0000 (16:28 -0600)]
tpm xen: Remove bogus tpm_chip_unregister
commit
1f0f30e404b3d8f4597a2d9b77fba55452f8fd0e upstream.
tpm_chip_unregister can only be called after tpm_chip_register.
devm manages the allocation so no unwind is needed here.
Fixes:
afb5abc262e96 ("tpm: two-phase chip management functions")
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Douglas Anderson [Wed, 14 Dec 2016 23:05:49 +0000 (15:05 -0800)]
kernel/debug/debug_core.c: more properly delay for secondary CPUs
commit
2d13bb6494c807bcf3f78af0e96c0b8615a94385 upstream.
We've got a delay loop waiting for secondary CPUs. That loop uses
loops_per_jiffy. However, loops_per_jiffy doesn't actually mean how
many tight loops make up a jiffy on all architectures. It is quite
common to see things like this in the boot log:
Calibrating delay loop (skipped), value calculated using timer
frequency.. 48.00 BogoMIPS (lpj=24000)
In my case I was seeing lots of cases where other CPUs timed out
entering the debugger only to print their stack crawls shortly after the
kdb> prompt was written.
Elsewhere in kgdb we already use udelay(), so that should be safe enough
to use to implement our timeout. We'll delay 1 ms for 1000 times, which
should give us a full second of delay (just like the old code wanted)
but allow us to notice that we're done every 1 ms.
[akpm@linux-foundation.org: simplifications, per Daniel]
Link: http://lkml.kernel.org/r/1477091361-2039-1-git-send-email-dianders@chromium.org
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Brian Norris <briannorris@chromium.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>
Konstantin Khlebnikov [Wed, 14 Dec 2016 23:04:04 +0000 (15:04 -0800)]
kernel/watchdog: use nmi registers snapshot in hardlockup handler
commit
4d1f0fb096aedea7bb5489af93498a82e467c480 upstream.
NMI handler doesn't call set_irq_regs(), it's set only by normal IRQ.
Thus get_irq_regs() returns NULL or stale registers snapshot with IP/SP
pointing to the code interrupted by IRQ which was interrupted by NMI.
NULL isn't a problem: in this case watchdog calls dump_stack() and
prints full stack trace including NMI. But if we're stuck in IRQ
handler then NMI watchlog will print stack trace without IRQ part at
all.
This patch uses registers snapshot passed into NMI handler as arguments:
these registers point exactly to the instruction interrupted by NMI.
Fixes:
55537871ef66 ("kernel/watchdog.c: perform all-CPU backtrace in case of hard lockup")
Link: http://lkml.kernel.org/r/146771764784.86724.6006627197118544150.stgit@buzz
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
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>
Pavel Shilovsky [Wed, 30 Nov 2016 00:14:43 +0000 (16:14 -0800)]
CIFS: Fix a possible memory corruption in push locks
commit
e3d240e9d505fc67f8f8735836df97a794bbd946 upstream.
If maxBuf is not 0 but less than a size of SMB2 lock structure
we can end up with a memory corruption.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pavel Shilovsky [Tue, 29 Nov 2016 19:30:58 +0000 (11:30 -0800)]
CIFS: Fix missing nls unload in smb2_reconnect()
commit
4772c79599564bd08ee6682715a7d3516f67433f upstream.
Acked-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pavel Shilovsky [Fri, 4 Nov 2016 18:50:31 +0000 (11:50 -0700)]
CIFS: Fix a possible memory corruption during reconnect
commit
53e0e11efe9289535b060a51d4cf37c25e0d0f2b upstream.
We can not unlock/lock cifs_tcp_ses_lock while walking through ses
and tcon lists because it can corrupt list iterator pointers and
a tcon structure can be released if we don't hold an extra reference.
Fix it by moving a reconnect process to a separate delayed work
and acquiring a reference to every tcon that needs to be reconnected.
Also do not send an echo request on newly established connections.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Fri, 25 Nov 2016 15:54:06 +0000 (16:54 +0100)]
ASoC: intel: Fix crash at suspend/resume without card registration
commit
2fc995a87f2efcd803438f07bfecd35cc3d90d32 upstream.
When ASoC Intel SST Medfield driver is probed but without codec / card
assigned, it causes an Oops and freezes the kernel at suspend/resume,
PM: Suspending system (freeze)
Suspending console(s) (use no_console_suspend to debug)
BUG: unable to handle kernel NULL pointer dereference at
0000000000000018
IP: [<
ffffffffc09d9409>] sst_soc_prepare+0x19/0xa0 [snd_soc_sst_mfld_platform]
Oops: 0000 [#1] PREEMPT SMP
CPU: 0 PID: 1552 Comm: systemd-sleep Tainted: G W 4.9.0-rc6-1.g5f5c2ad-default #1
Call Trace:
[<
ffffffffb45318f9>] dpm_prepare+0x209/0x460
[<
ffffffffb4531b61>] dpm_suspend_start+0x11/0x60
[<
ffffffffb40d3cc2>] suspend_devices_and_enter+0xb2/0x710
[<
ffffffffb40d462e>] pm_suspend+0x30e/0x390
[<
ffffffffb40d2eba>] state_store+0x8a/0x90
[<
ffffffffb43c670f>] kobj_attr_store+0xf/0x20
[<
ffffffffb42b0d97>] sysfs_kf_write+0x37/0x40
[<
ffffffffb42b02bc>] kernfs_fop_write+0x11c/0x1b0
[<
ffffffffb422be68>] __vfs_write+0x28/0x140
[<
ffffffffb43728a8>] ? apparmor_file_permission+0x18/0x20
[<
ffffffffb433b2ab>] ? security_file_permission+0x3b/0xc0
[<
ffffffffb422d095>] vfs_write+0xb5/0x1a0
[<
ffffffffb422e3d6>] SyS_write+0x46/0xa0
[<
ffffffffb4719fbb>] entry_SYSCALL_64_fastpath+0x1e/0xad
Add proper NULL checks in the PM code of mdfld driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Benjamin Marzinski [Wed, 30 Nov 2016 23:56:14 +0000 (17:56 -0600)]
dm space map metadata: fix 'struct sm_metadata' leak on failed create
commit
314c25c56c1ee5026cf99c570bdfe01847927acb upstream.
In dm_sm_metadata_create() we temporarily change the dm_space_map
operations from 'ops' (whose .destroy function deallocates the
sm_metadata) to 'bootstrap_ops' (whose .destroy function doesn't).
If dm_sm_metadata_create() fails in sm_ll_new_metadata() or
sm_ll_extend(), it exits back to dm_tm_create_internal(), which calls
dm_sm_destroy() with the intention of freeing the sm_metadata, but it
doesn't (because the dm_space_map operations is still set to
'bootstrap_ops').
Fix this by setting the dm_space_map operations back to 'ops' if
dm_sm_metadata_create() fails when it is set to 'bootstrap_ops'.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ondrej Kozina [Wed, 2 Nov 2016 14:02:08 +0000 (15:02 +0100)]
dm crypt: mark key as invalid until properly loaded
commit
265e9098bac02bc5e36cda21fdbad34cb5b2f48d upstream.
In crypt_set_key(), if a failure occurs while replacing the old key
(e.g. tfm->setkey() fails) the key must not have DM_CRYPT_KEY_VALID flag
set. Otherwise, the crypto layer would have an invalid key that still
has DM_CRYPT_KEY_VALID flag set.
Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Reviewed-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wei Yongjun [Mon, 8 Aug 2016 14:09:27 +0000 (14:09 +0000)]
dm flakey: return -EINVAL on interval bounds error in flakey_ctr()
commit
bff7e067ee518f9ed7e1cbc63e4c9e01670d0b71 upstream.
Fix to return error code -EINVAL instead of 0, as is done elsewhere in
this function.
Fixes:
e80d1c805a3b ("dm: do not override error code returned from dm_get_device()")
Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bart Van Assche [Sat, 29 Oct 2016 00:18:48 +0000 (17:18 -0700)]
blk-mq: Do not invoke .queue_rq() for a stopped queue
commit
bc27c01b5c46d3bfec42c96537c7a3fae0bb2cc4 upstream.
The meaning of the BLK_MQ_S_STOPPED flag is "do not call
.queue_rq()". Hence modify blk_mq_make_request() such that requests
are queued instead of issued if a queue has been stopped.
Reported-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Felipe Balbi [Wed, 28 Sep 2016 09:33:31 +0000 (12:33 +0300)]
usb: gadget: composite: always set ep->mult to a sensible value
commit
eaa496ffaaf19591fe471a36cef366146eeb9153 upstream.
ep->mult is supposed to be set to Isochronous and
Interrupt Endapoint's multiplier value. This value
is computed from different places depending on the
link speed.
If we're dealing with HighSpeed, then it's part of
bits [12:11] of wMaxPacketSize. This case wasn't
taken into consideration before.
While at that, also make sure the ep->mult defaults
to one so drivers can use it unconditionally and
assume they'll never multiply ep->maxpacket to zero.
Cc: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric W. Biederman [Thu, 17 Nov 2016 04:06:51 +0000 (22:06 -0600)]
exec: Ensure mm->user_ns contains the execed files
commit
f84df2a6f268de584a201e8911384a2d244876e3 upstream.
When the user namespace support was merged the need to prevent
ptrace from revealing the contents of an unreadable executable
was overlooked.
Correct this oversight by ensuring that the executed file
or files are in mm->user_ns, by adjusting mm->user_ns.
Use the new function privileged_wrt_inode_uidgid to see if
the executable is a member of the user namespace, and as such
if having CAP_SYS_PTRACE in the user namespace should allow
tracing the executable. If not update mm->user_ns to
the parent user namespace until an appropriate parent is found.
Reported-by: Jann Horn <jann@thejh.net>
Fixes:
9e4a36ece652 ("userns: Fail exec for suid and sgid binaries with ids outside our user namespace.")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Aleksa Sarai [Wed, 21 Dec 2016 05:26:24 +0000 (16:26 +1100)]
fs: exec: apply CLOEXEC before changing dumpable task flags
commit
613cc2b6f272c1a8ad33aefa21cad77af23139f7 upstream.
If you have a process that has set itself to be non-dumpable, and it
then undergoes exec(2), any CLOEXEC file descriptors it has open are
"exposed" during a race window between the dumpable flags of the process
being reset for exec(2) and CLOEXEC being applied to the file
descriptors. This can be exploited by a process by attempting to access
/proc/<pid>/fd/... during this window, without requiring CAP_SYS_PTRACE.
The race in question is after set_dumpable has been (for get_link,
though the trace is basically the same for readlink):
[vfs]
-> proc_pid_link_inode_operations.get_link
-> proc_pid_get_link
-> proc_fd_access_allowed
-> ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS);
Which will return 0, during the race window and CLOEXEC file descriptors
will still be open during this window because do_close_on_exec has not
been called yet. As a result, the ordering of these calls should be
reversed to avoid this race window.
This is of particular concern to container runtimes, where joining a
PID namespace with file descriptors referring to the host filesystem
can result in security issues (since PRCTL_SET_DUMPABLE doesn't protect
against access of CLOEXEC file descriptors -- file descriptors which may
reference filesystem objects the container shouldn't have access to).
Cc: dev@opencontainers.org
Cc: <stable@vger.kernel.org> # v3.2+
Reported-by: Michael Crosby <crosbymichael@gmail.com>
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Shaohua Li [Tue, 13 Dec 2016 00:41:50 +0000 (16:41 -0800)]
mm/vmscan.c: set correct defer count for shrinker
commit
5f33a0803bbd781de916f5c7448cbbbbc763d911 upstream.
Our system uses significantly more slab memory with memcg enabled with
the latest kernel. With 3.10 kernel, slab uses 2G memory, while with
4.6 kernel, 6G memory is used. The shrinker has problem. Let's see we
have two memcg for one shrinker. In do_shrink_slab:
1. Check cg1. nr_deferred = 0, assume total_scan = 700. batch size
is 1024, then no memory is freed. nr_deferred = 700
2. Check cg2. nr_deferred = 700. Assume freeable = 20, then
total_scan = 10 or 40. Let's assume it's 10. No memory is freed.
nr_deferred = 10.
The deferred share of cg1 is lost in this case. kswapd will free no
memory even run above steps again and again.
The fix makes sure one memcg's deferred share isn't lost.
Link: http://lkml.kernel.org/r/2414be961b5d25892060315fbb56bb19d81d0c07.1476227351.git.shli@fb.com
Signed-off-by: Shaohua Li <shli@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov@parallels.com>
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>
Omar Sandoval [Mon, 14 Nov 2016 22:56:17 +0000 (14:56 -0800)]
loop: return proper error from loop_queue_rq()
commit
b4a567e8114327518c09f5632339a5954ab975a3 upstream.
->queue_rq() should return one of the BLK_MQ_RQ_QUEUE_* constants, not
an errno.
Fixes:
f4aa4c7bbac6 ("block: loop: convert to per-device workqueue")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nicolai Stange [Sun, 20 Nov 2016 18:57:23 +0000 (19:57 +0100)]
f2fs: set ->owner for debugfs status file's file_operations
commit
05e6ea2685c964db1e675a24a4f4e2adc22d2388 upstream.
The struct file_operations instance serving the f2fs/status debugfs file
lacks an initialization of its ->owner.
This means that although that file might have been opened, the f2fs module
can still get removed. Any further operation on that opened file, releasing
included, will cause accesses to unmapped memory.
Indeed, Mike Marshall reported the following:
BUG: unable to handle kernel paging request at
ffffffffa0307430
IP: [<
ffffffff8132a224>] full_proxy_release+0x24/0x90
<...>
Call Trace:
[] __fput+0xdf/0x1d0
[] ____fput+0xe/0x10
[] task_work_run+0x8e/0xc0
[] do_exit+0x2ae/0xae0
[] ? __audit_syscall_entry+0xae/0x100
[] ? syscall_trace_enter+0x1ca/0x310
[] do_group_exit+0x44/0xc0
[] SyS_exit_group+0x14/0x20
[] do_syscall_64+0x61/0x150
[] entry_SYSCALL64_slow_path+0x25/0x25
<...>
---[ end trace
f22ae883fa3ea6b8 ]---
Fixing recursive fault but reboot is needed!
Fix this by initializing the f2fs/status file_operations' ->owner with
THIS_MODULE.
This will allow debugfs to grab a reference to the f2fs module upon any
open on that file, thus preventing it from getting removed.
Fixes:
902829aa0b72 ("f2fs: move proc files to debugfs")
Reported-by: Mike Marshall <hubcap@omnibond.com>
Reported-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sergey Karamov [Sat, 10 Dec 2016 22:54:58 +0000 (17:54 -0500)]
ext4: do not perform data journaling when data is encrypted
commit
73b92a2a5e97d17cc4d5c4fe9d724d3273fb6fd2 upstream.
Currently data journalling is incompatible with encryption: enabling both
at the same time has never been supported by design, and would result in
unpredictable behavior. However, users are not precluded from turning on
both features simultaneously. This change programmatically replaces data
journaling for encrypted regular files with ordered data journaling mode.
Background:
Journaling encrypted data has not been supported because it operates on
buffer heads of the page in the page cache. Namely, when the commit
happens, which could be up to five seconds after caching, the commit
thread uses the buffer heads attached to the page to copy the contents of
the page to the journal. With encryption, it would have been required to
keep the bounce buffer with ciphertext for up to the aforementioned five
seconds, since the page cache can only hold plaintext and could not be
used for journaling. Alternatively, it would be required to setup the
journal to initiate a callback at the commit time to perform deferred
encryption - in this case, not only would the data have to be written
twice, but it would also have to be encrypted twice. This level of
complexity was not justified for a mode that in practice is very rarely
used because of the overhead from the data journalling.
Solution:
If data=journaled has been set as a mount option for a filesystem, or if
journaling is enabled on a regular file, do not perform journaling if the
file is also encrypted, instead fall back to the data=ordered mode for the
file.
Rationale:
The intent is to allow seamless and proper filesystem operation when
journaling and encryption have both been enabled, and have these two
conflicting features gracefully resolved by the filesystem.
Fixes:
4461471107b7
Signed-off-by: Sergey Karamov <skaramov@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dan Carpenter [Sat, 10 Dec 2016 14:56:01 +0000 (09:56 -0500)]
ext4: return -ENOMEM instead of success
commit
578620f451f836389424833f1454eeeb2ffc9e9f upstream.
We should set the error code if kzalloc() fails.
Fixes:
67cf5b09a46f ("ext4: add the basic function for inline data support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Darrick J. Wong [Sat, 10 Dec 2016 14:55:01 +0000 (09:55 -0500)]
ext4: reject inodes with negative size
commit
7e6e1ef48fc02f3ac5d0edecbb0c6087cd758d58 upstream.
Don't load an inode with a negative size; this causes integer overflow
problems in the VFS.
[ Added EXT4_ERROR_INODE() to mark file system as corrupted. -TYT]
Fixes:
a48380f769df (ext4: rename i_dir_acl to i_size_high)
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Theodore Ts'o [Fri, 18 Nov 2016 18:37:47 +0000 (13:37 -0500)]
ext4: add sanity checking to count_overhead()
commit
c48ae41bafe31e9a66d8be2ced4e42a6b57fa814 upstream.
The commit "ext4: sanity check the block and cluster size at mount
time" should prevent any problems, but in case the superblock is
modified while the file system is mounted, add an extra safety check
to make sure we won't overrun the allocated buffer.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Theodore Ts'o [Fri, 18 Nov 2016 18:24:26 +0000 (13:24 -0500)]
ext4: fix in-superblock mount options processing
commit
5aee0f8a3f42c94c5012f1673420aee96315925a upstream.
Fix a large number of problems with how we handle mount options in the
superblock. For one, if the string in the superblock is long enough
that it is not null terminated, we could run off the end of the string
and try to interpret superblocks fields as characters. It's unlikely
this will cause a security problem, but it could result in an invalid
parse. Also, parse_options is destructive to the string, so in some
cases if there is a comma-separated string, it would be modified in
the superblock. (Fortunately it only happens on file systems with a
1k block size.)
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Theodore Ts'o [Fri, 18 Nov 2016 18:28:30 +0000 (13:28 -0500)]
ext4: use more strict checks for inodes_per_block on mount
commit
cd6bb35bf7f6d7d922509bf50265383a0ceabe96 upstream.
Centralize the checks for inodes_per_block and be more strict to make
sure the inodes_per_block_group can't end up being zero.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chandan Rajendra [Tue, 15 Nov 2016 02:26:26 +0000 (21:26 -0500)]
ext4: fix stack memory corruption with 64k block size
commit
30a9d7afe70ed6bd9191d3000e2ef1a34fb58493 upstream.
The number of 'counters' elements needed in 'struct sg' is
super_block->s_blocksize_bits + 2. Presently we have 16 'counters'
elements in the array. This is insufficient for block sizes >= 32k. In
such cases the memcpy operation performed in ext4_mb_seq_groups_show()
would cause stack memory corruption.
Fixes:
c9de560ded61f
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Chandan Rajendra [Tue, 15 Nov 2016 02:04:37 +0000 (21:04 -0500)]
ext4: fix mballoc breakage with 64k block size
commit
69e43e8cc971a79dd1ee5d4343d8e63f82725123 upstream.
'border' variable is set to a value of 2 times the block size of the
underlying filesystem. With 64k block size, the resulting value won't
fit into a 16-bit variable. Hence this commit changes the data type of
'border' to 'unsigned int'.
Fixes:
c9de560ded61f
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Porosanu [Wed, 9 Nov 2016 08:46:11 +0000 (10:46 +0200)]
crypto: caam - fix AEAD givenc descriptors
commit
d128af17876d79b87edf048303f98b35f6a53dbc upstream.
The AEAD givenc descriptor relies on moving the IV through the
output FIFO and then back to the CTX2 for authentication. The
SEQ FIFO STORE could be scheduled before the data can be
read from OFIFO, especially since the SEQ FIFO LOAD needs
to wait for the SEQ FIFO LOAD SKIP to finish first. The
SKIP takes more time when the input is SG than when it's
a contiguous buffer. If the SEQ FIFO LOAD is not scheduled
before the STORE, the DECO will hang waiting for data
to be available in the OFIFO so it can be transferred to C2.
In order to overcome this, first force transfer of IV to C2
by starting the "cryptlen" transfer first and then starting to
store data from OFIFO to the output buffer.
Fixes:
1acebad3d8db8 ("crypto: caam - faster aead implementation")
Signed-off-by: Alex Porosanu <alexandru.porosanu@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric W. Biederman [Tue, 15 Nov 2016 00:48:07 +0000 (18:48 -0600)]
ptrace: Capture the ptracer's creds not PT_PTRACE_CAP
commit
64b875f7ac8a5d60a4e191479299e931ee949b67 upstream.
When the flag PT_PTRACE_CAP was added the PTRACE_TRACEME path was
overlooked. This can result in incorrect behavior when an application
like strace traces an exec of a setuid executable.
Further PT_PTRACE_CAP does not have enough information for making good
security decisions as it does not report which user namespace the
capability is in. This has already allowed one mistake through
insufficient granulariy.
I found this issue when I was testing another corner case of exec and
discovered that I could not get strace to set PT_PTRACE_CAP even when
running strace as root with a full set of caps.
This change fixes the above issue with strace allowing stracing as
root a setuid executable without disabling setuid. More fundamentaly
this change allows what is allowable at all times, by using the correct
information in it's decision.
Fixes:
4214e42f96d4 ("v2.4.9.11 -> v2.4.9.12")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric W. Biederman [Fri, 14 Oct 2016 02:23:16 +0000 (21:23 -0500)]
mm: Add a user_ns owner to mm_struct and fix ptrace permission checks
commit
bfedb589252c01fa505ac9f6f2a3d5d68d707ef4 upstream.
During exec dumpable is cleared if the file that is being executed is
not readable by the user executing the file. A bug in
ptrace_may_access allows reading the file if the executable happens to
enter into a subordinate user namespace (aka clone(CLONE_NEWUSER),
unshare(CLONE_NEWUSER), or setns(fd, CLONE_NEWUSER).
This problem is fixed with only necessary userspace breakage by adding
a user namespace owner to mm_struct, captured at the time of exec, so
it is clear in which user namespace CAP_SYS_PTRACE must be present in
to be able to safely give read permission to the executable.
The function ptrace_may_access is modified to verify that the ptracer
has CAP_SYS_ADMIN in task->mm->user_ns instead of task->cred->user_ns.
This ensures that if the task changes it's cred into a subordinate
user namespace it does not become ptraceable.
The function ptrace_attach is modified to only set PT_PTRACE_CAP when
CAP_SYS_PTRACE is held over task->mm->user_ns. The intent of
PT_PTRACE_CAP is to be a flag to note that whatever permission changes
the task might go through the tracer has sufficient permissions for
it not to be an issue. task->cred->user_ns is always the same
as or descendent of mm->user_ns. Which guarantees that having
CAP_SYS_PTRACE over mm->user_ns is the worst case for the tasks
credentials.
To prevent regressions mm->dumpable and mm->user_ns are not considered
when a task has no mm. As simply failing ptrace_may_attach causes
regressions in privileged applications attempting to read things
such as /proc/<pid>/stat
Acked-by: Kees Cook <keescook@chromium.org>
Tested-by: Cyrill Gorcunov <gorcunov@openvz.org>
Fixes:
8409cca70561 ("userns: allow ptrace from non-init user namespaces")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
NeilBrown [Mon, 12 Dec 2016 15:21:51 +0000 (08:21 -0700)]
block_dev: don't test bdev->bd_contains when it is not stable
commit
bcc7f5b4bee8e327689a4d994022765855c807ff upstream.
bdev->bd_contains is not stable before calling __blkdev_get().
When __blkdev_get() is called on a parition with ->bd_openers == 0
it sets
bdev->bd_contains = bdev;
which is not correct for a partition.
After a call to __blkdev_get() succeeds, ->bd_openers will be > 0
and then ->bd_contains is stable.
When FMODE_EXCL is used, blkdev_get() calls
bd_start_claiming() -> bd_prepare_to_claim() -> bd_may_claim()
This call happens before __blkdev_get() is called, so ->bd_contains
is not stable. So bd_may_claim() cannot safely use ->bd_contains.
It currently tries to use it, and this can lead to a BUG_ON().
This happens when a whole device is already open with a bd_holder (in
use by dm in my particular example) and two threads race to open a
partition of that device for the first time, one opening with O_EXCL and
one without.
The thread that doesn't use O_EXCL gets through blkdev_get() to
__blkdev_get(), gains the ->bd_mutex, and sets bdev->bd_contains = bdev;
Immediately thereafter the other thread, using FMODE_EXCL, calls
bd_start_claiming() from blkdev_get(). This should fail because the
whole device has a holder, but because bdev->bd_contains == bdev
bd_may_claim() incorrectly reports success.
This thread continues and blocks on bd_mutex.
The first thread then sets bdev->bd_contains correctly and drops the mutex.
The thread using FMODE_EXCL then continues and when it calls bd_may_claim()
again in:
BUG_ON(!bd_may_claim(bdev, whole, holder));
The BUG_ON fires.
Fix this by removing the dependency on ->bd_contains in
bd_may_claim(). As bd_may_claim() has direct access to the whole
device, it can simply test if the target bdev is the whole device.
Fixes:
6b4517a7913a ("block: implement bd_claiming and claiming block")
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wang Xiaoguang [Thu, 13 Oct 2016 01:23:39 +0000 (09:23 +0800)]
btrfs: make file clone aware of fatal signals
commit
69ae5e4459e43e56f03d0987e865fbac2b05af2a upstream.
Indeed this just make the behavior similar to xfs when process has
fatal signals pending, and it'll make fstests/generic/298 happy.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Bacik [Fri, 23 Sep 2016 11:23:28 +0000 (13:23 +0200)]
Btrfs: don't BUG() during drop snapshot
commit
4867268c57ff709a7b6b86ae6f6537d846d1443a upstream.
Really there's lots of things that can go wrong here, kill all the
BUG_ON()'s and replace the logic ones with ASSERT()'s and return EIO
instead.
Signed-off-by: Josef Bacik <jbacik@fb.com>
[ switched to btrfs_err, errors go to common label ]
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Wed, 14 Sep 2016 02:02:27 +0000 (19:02 -0700)]
Btrfs: fix memory leak in do_walk_down
commit
a958eab0ed7fdc1b977bc25d3af6efedaa945488 upstream.
The extent buffer 'next' needs to be free'd conditionally.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Josef Bacik [Fri, 2 Sep 2016 19:25:43 +0000 (15:25 -0400)]
Btrfs: don't leak reloc root nodes on error
commit
6bdf131fac2336adb1a628f992ba32384f653a55 upstream.
We don't track the reloc roots in any sort of normal way, so the only way the
root/commit_root nodes get free'd is if the relocation finishes successfully and
the reloc root is deleted. Fix this by free'ing them in free_reloc_roots.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Wed, 14 Sep 2016 15:51:46 +0000 (08:51 -0700)]
Btrfs: return gracefully from balance if fs tree is corrupted
commit
3561b9db70928f207be4570b48fc19898eeaef54 upstream.
When relocating tree blocks, we firstly get block information from
back references in the extent tree, we then search fs tree to try to
find all parents of a block.
However, if fs tree is corrupted, eg. if there're some missing
items, we could come across these WARN_ONs and BUG_ONs.
This makes us print some error messages and return gracefully
from balance.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Fri, 26 Aug 2016 01:08:27 +0000 (18:08 -0700)]
Btrfs: bail out if block group has different mixed flag
commit
49303381f19ab16a371a061b67e783d3f570d56e upstream.
Currently we allow inconsistence about mixed flag
(BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA).
We'd get ENOSPC if block group has mixed flag and btrfs doesn't.
If that happens, we have one space_info with mixed flag and another
space_info only with BTRFS_BLOCK_GROUP_METADATA, and
global_block_rsv.space_info points to the latter one, but all bytes
from block_group contributes to the mixed space_info, thus all the
allocation will fail with ENOSPC.
This adds a check for the above case.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
[ updated message ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liu Bo [Wed, 3 Aug 2016 19:33:01 +0000 (12:33 -0700)]
Btrfs: fix memory leak in reading btree blocks
commit
2571e739677f1e4c0c63f5ed49adcc0857923625 upstream.
So we can read a btree block via readahead or intentional read,
and we can end up with a memory leak when something happens as
follows,
1) readahead starts to read block A but does not wait for read
completion,
2) btree_readpage_end_io_hook finds that block A is corrupted,
and it needs to clear all block A's pages' uptodate bit.
3) meanwhile an intentional read kicks in and checks block A's
pages' uptodate to decide which page needs to be read.
4) when some pages have the uptodate bit during 3)'s check so
3) doesn't count them for eb->io_pages, but they are later
cleared by 2) so we has to readpage on the page, we get
the wrong eb->io_pages which results in a memory leak of
this block.
This fixes the problem by firstly getting all pages's locking and
then checking pages' uptodate bit.
t1(readahead) t2(readahead endio) t3(the following read)
read_extent_buffer_pages end_bio_extent_readpage
for pg in eb: for page 0,1,2 in eb:
if pg is uptodate: btree_readpage_end_io_hook(pg)
num_reads++ if uptodate:
eb->io_pages = num_reads SetPageUptodate(pg) _______________
for pg in eb: for page 3 in eb: read_extent_buffer_pages
if pg is NOT uptodate: btree_readpage_end_io_hook(pg) for pg in eb:
__extent_read_full_page(pg) sanity check reports something wrong if pg is uptodate:
clear_extent_buffer_uptodate(eb) num_reads++
for pg in eb: eb->io_pages = num_reads
ClearPageUptodate(page) _______________
for pg in eb:
if pg is NOT uptodate:
__extent_read_full_page(pg)
So t3's eb->io_pages is not consistent with the number of pages it's reading,
and during endio(), atomic_dec_and_test(&eb->io_pages) will get a negative
number so that we're not able to free the eb.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Richard Watts [Fri, 2 Dec 2016 21:14:38 +0000 (23:14 +0200)]
clk: ti: omap36xx: Work around sprz319 advisory 2.1
commit
035cd485a47dda64f25ccf8a90b11a07d0b7aa7a upstream.
The OMAP36xx DPLL5, driving EHCI USB, can be subject to a long-term
frequency drift. The frequency drift magnitude depends on the VCO update
rate, which is inversely proportional to the PLL divider. The kernel
DPLL configuration code results in a high value for the divider, leading
to a long term drift high enough to cause USB transmission errors. In
the worst case the USB PHY's ULPI interface can stop responding,
breaking USB operation completely. This manifests itself on the
Beagleboard xM by the LAN9514 reporting 'Cannot enable port 2. Maybe the
cable is bad?' in the kernel log.
Errata sprz319 advisory 2.1 documents PLL values that minimize the
drift. Use them automatically when DPLL5 is used for USB operation,
which we detect based on the requested clock rate. The clock framework
will still compute the PLL parameters and resulting rate as usual, but
the PLL M and N values will then be overridden. This can result in the
effective clock rate being slightly different than the rate cached by
the clock framework, but won't cause any adverse effect to USB
operation.
Signed-off-by: Richard Watts <rrw@kynesim.co.uk>
[Upported from v3.2 to v4.9]
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Adam Ford <aford173@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kai-Heng Feng [Tue, 6 Dec 2016 08:56:27 +0000 (16:56 +0800)]
ALSA: hda: when comparing pin configurations, ignore assoc in addition to seq
commit
5e0ad0d8747f3e4803a9c3d96d64dd7332506d3c upstream.
Commit [
64047d7f4912 ALSA: hda - ignore the assoc and seq when comparing
pin configurations] intented to ignore both seq and assoc at pin
comparing, but it only ignored seq. So that commit may still fail to
match pins on some machines.
Change the bitmask to also ignore assoc.
v2: Use macro to do bit masking.
Thanks to Hui Wang for the analysis.
Fixes:
64047d7f4912 ("ALSA: hda - ignore the assoc and seq when comparing...")
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Tue, 6 Dec 2016 10:55:17 +0000 (11:55 +0100)]
ALSA: hda - Gate the mic jack on HP Z1 Gen3 AiO
commit
f73cd43ac3b41c0f09a126387f302bbc0d9c726d upstream.
HP Z1 Gen3 AiO with Conexant codec doesn't give an unsolicited event
to the headset mic pin upon the jack plugging, it reports only to the
headphone pin. It results in the missing mic switching. Let's fix up
by simply gating the jack event.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hui Wang [Wed, 23 Nov 2016 08:05:38 +0000 (16:05 +0800)]
ALSA: hda - fix headset-mic problem on a Dell laptop
commit
989dbe4a30728c047316ab87e5fa8b609951ce7c upstream.
This group of new pins is not in the pin quirk table yet, adding
them to the pin quirk table to fix the headset-mic problem.
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hui Wang [Wed, 23 Nov 2016 08:05:37 +0000 (16:05 +0800)]
ALSA: hda - ignore the assoc and seq when comparing pin configurations
commit
64047d7f4912de1769d1bf0d34c6322494b13779 upstream.
More and more pin configurations have been adding to the pin quirk
table, lots of them are only different from assoc and seq, but they
all apply to the same QUIRK_FIXUP, if we don't compare assoc and seq
when matching pin configurations, it will greatly reduce the pin
quirk table size.
We have tested this change on a couple of Dell laptops, it worked
well.
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sven Hahne [Fri, 25 Nov 2016 13:16:43 +0000 (14:16 +0100)]
ALSA: hda/ca0132 - Add quirk for Alienware 15 R2 2016
commit
b5337cfe067e96b8a98699da90c7dcd2bec21133 upstream.
I'm using an Alienware 15 R2 and had to use the alienware quirks to
get my headphone output working.
I fixed it by adding, SND_PCI_QUIRK(0x1028, 0x0708, "Alienware 15 R2
2016", QUIRK_ALIENWARE) to the patch.
Signed-off-by: Sven Hahne <hahne@zeitkunst.eu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jussi Laako [Mon, 28 Nov 2016 09:27:45 +0000 (11:27 +0200)]
ALSA: hiface: Fix M2Tech hiFace driver sampling rate change
commit
995c6a7fd9b9212abdf01160f6ce3193176be503 upstream.
Sampling rate changes after first set one are not reflected to the
hardware, while driver and ALSA think the rate has been changed.
Fix the problem by properly stopping the interface at the beginning of
prepare call, allowing new rate to be set to the hardware. This keeps
the hardware in sync with the driver.
Signed-off-by: Jussi Laako <jussi@sonarnerd.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Con Kolivas [Fri, 9 Dec 2016 04:15:57 +0000 (15:15 +1100)]
ALSA: usb-audio: Add QuickCam Communicate Deluxe/S7500 to volume_control_quirks
commit
82ffb6fc637150b279f49e174166d2aa3853eaf4 upstream.
The Logitech QuickCam Communicate Deluxe/S7500 microphone fails with the
following warning.
[ 6.778995] usb 2-1.2.2.2: Warning! Unlikely big volume range (=3072),
cval->res is probably wrong.
[ 6.778996] usb 2-1.2.2.2: [5] FU [Mic Capture Volume] ch = 1, val =
4608/7680/1
Adding it to the list of devices in volume_control_quirks makes it work
properly, fixing related typo.
Signed-off-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alan Stern [Fri, 21 Oct 2016 20:49:07 +0000 (16:49 -0400)]
USB: UHCI: report non-PME wakeup signalling for Intel hardware
commit
ccdb6be9ec6580ef69f68949ebe26e0fb58a6fb0 upstream.
The UHCI controllers in Intel chipsets rely on a platform-specific non-PME
mechanism for wakeup signalling. They can generate wakeup signals even
though they don't support PME.
We need to let the USB core know this so that it will enable runtime
suspend for UHCI controllers.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Felipe Balbi [Wed, 28 Sep 2016 07:38:11 +0000 (10:38 +0300)]
usb: gadget: composite: correctly initialize ep->maxpacket
commit
e8f29bb719b47a234f33b0af62974d7a9521a52c upstream.
usb_endpoint_maxp() returns wMaxPacketSize in its
raw form. Without taking into consideration that it
also contains other bits reserved for isochronous
endpoints.
This patch fixes one occasion where this is a
problem by making sure that we initialize
ep->maxpacket only with lower 10 bits of the value
returned by usb_endpoint_maxp(). Note that seperate
patches will be necessary to audit all call sites of
usb_endpoint_maxp() and make sure that
usb_endpoint_maxp() only returns lower 10 bits of
wMaxPacketSize.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>