Ville Syrjälä [Thu, 15 Oct 2015 14:01:58 +0000 (17:01 +0300)]
drm/i915: skl_update_scaler() wants a rotation bitmask instead of bit number
commit
fa5a7970d372c9c9beb3a0ce79ee1d0c23387d0a upstream.
Pass BIT(DRM_ROTATE_0) instead of DRM_ROTATE_0 to skl_update_scaler().
The former is a mask, the latter just the bit number.
Fortunately the only thing skl_update_scaler() does with the rotation
is check if it's 90/270 degrees or not, and so in this case it would
still do the right thing.
Cc: Chandra Konduru <chandra.konduru@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1444917718-28495-1-git-send-email-ville.syrjala@linux.intel.com
Fixes:
6156a45602f9 ("drm/i915: skylake primary plane scaling using shared scalers")
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ville Syrjälä [Mon, 11 Jan 2016 18:48:32 +0000 (20:48 +0200)]
drm/i915: Cleanup phys status page too
commit
7d3fdfff23852fe458a0d0979a3555fe60f1e563 upstream.
Restore the lost phys status page cleanup.
Fixes the following splat with DMA_API_DEBUG=y:
WARNING: CPU: 0 PID: 21615 at ../lib/dma-debug.c:974 dma_debug_device_change+0x190/0x1f0()
pci 0000:00:02.0: DMA-API: device driver has pending DMA allocations while released from device [count=1]
One of leaked entries details: [device address=0x0000000023163000] [size=4096 bytes] [mapped with DMA_BIDIRECTIONAL] [mapped as coherent]
Modules linked in: i915(-) i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm sha256_generic hmac drbg ctr ccm sch_fq_codel binfmt_misc joydev mousedev arc4 ath5k iTCO_wdt mac80211 smsc_ircc2 ath snd_intel8x0m snd_intel8x0 snd_ac97_codec ac97_bus psmouse snd_pcm input_leds i2c_i801 pcspkr snd_timer cfg80211 snd soundcore i2c_core ehci_pci firewire_ohci ehci_hcd firewire_core lpc_ich 8139too rfkill crc_itu_t mfd_core mii usbcore rng_core intel_agp intel_gtt usb_common agpgart irda crc_ccitt fujitsu_laptop led_class parport_pc video parport evdev backlight
CPU: 0 PID: 21615 Comm: rmmod Tainted: G U 4.4.0-rc4-mgm-ovl+ #4
Hardware name: FUJITSU SIEMENS LIFEBOOK S6120/FJNB16C, BIOS Version 1.26 05/10/2004
e31a3de0 e31a3de0 e31a3d9c c128d4bd e31a3dd0 c1045a0c c15e00c4 e31a3dfc
0000546f c15dfad2 000003ce c12b3740 000003ce c12b3740 00000000 00000001
f61fb8a0 e31a3de8 c1045a83 00000009 e31a3de0 c15e00c4 e31a3dfc e31a3e4c
Call Trace:
[<
c128d4bd>] dump_stack+0x16/0x19
[<
c1045a0c>] warn_slowpath_common+0x8c/0xd0
[<
c12b3740>] ? dma_debug_device_change+0x190/0x1f0
[<
c12b3740>] ? dma_debug_device_change+0x190/0x1f0
[<
c1045a83>] warn_slowpath_fmt+0x33/0x40
[<
c12b3740>] dma_debug_device_change+0x190/0x1f0
[<
c1065499>] notifier_call_chain+0x59/0x70
[<
c10655af>] __blocking_notifier_call_chain+0x3f/0x80
[<
c106560f>] blocking_notifier_call_chain+0x1f/0x30
[<
c134cfb3>] __device_release_driver+0xc3/0xf0
[<
c134d0d7>] driver_detach+0x97/0xa0
[<
c134c440>] bus_remove_driver+0x40/0x90
[<
c134db18>] driver_unregister+0x28/0x60
[<
c1079e8c>] ? trace_hardirqs_on_caller+0x12c/0x1d0
[<
c12c0618>] pci_unregister_driver+0x18/0x80
[<
f83e96e7>] drm_pci_exit+0x87/0xb0 [drm]
[<
f8b3be2d>] i915_exit+0x1b/0x1ee [i915]
[<
c10b999c>] SyS_delete_module+0x14c/0x210
[<
c1079e8c>] ? trace_hardirqs_on_caller+0x12c/0x1d0
[<
c115a9bd>] ? ____fput+0xd/0x10
[<
c1002014>] do_fast_syscall_32+0xa4/0x450
[<
c149f6fa>] sysenter_past_esp+0x3b/0x5d
---[ end trace
c2ecbc77760f10a0 ]---
Mapped at:
[<
c12b3183>] debug_dma_alloc_coherent+0x33/0x90
[<
f83e989c>] drm_pci_alloc+0x18c/0x1e0 [drm]
[<
f8acd59f>] intel_init_ring_buffer+0x2af/0x490 [i915]
[<
f8acd8b0>] intel_init_render_ring_buffer+0x130/0x750 [i915]
[<
f8aaea4e>] i915_gem_init_rings+0x1e/0x110 [i915]
v2: s/BUG_ON/WARN_ON/ since dim doens't like the former anymore
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Fixes:
5c6c600 ("drm/i915: Remove DRI1 ring accessors and API")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v1)
Link: http://patchwork.freedesktop.org/patch/msgid/1452538112-5331-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vladimir Zapolskiy [Sun, 6 Mar 2016 01:21:46 +0000 (03:21 +0200)]
pwm: brcmstb: Fix check of devm_ioremap_resource() return code
commit
c5857e3f94ab2719dfac649a146cb5dd6f21fcf3 upstream.
The change fixes potential oops while accessing iomem on invalid address
if devm_ioremap_resource() fails due to some reason.
The devm_ioremap_resource() function returns ERR_PTR() and never returns
NULL, which makes useless a following check for NULL.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Fixes:
3a9f5957020f ("pwm: Add Broadcom BCM7038 PWM controller support")
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cpaul@redhat.com [Fri, 22 Apr 2016 20:08:46 +0000 (16:08 -0400)]
drm/dp/mst: Get validated port ref in drm_dp_update_payload_part1()
commit
263efde31f97c498e1ebad30e4d2906609d7ad6b upstream.
We can thank KASAN for finding this, otherwise I probably would have spent
hours on it. This fixes a somewhat harder to trigger kernel panic, occuring
while enabling MST where the port we were currently updating the payload on
would have all of it's refs dropped before we finished what we were doing:
==================================================================
BUG: KASAN: use-after-free in drm_dp_update_payload_part1+0xb3f/0xdb0 [drm_kms_helper] at addr
ffff8800d29de018
Read of size 4 by task Xorg/973
=============================================================================
BUG kmalloc-2048 (Tainted: G B W ): kasan: bad access detected
-----------------------------------------------------------------------------
INFO: Allocated in drm_dp_add_port+0x1aa/0x1ed0 [drm_kms_helper] age=16477 cpu=0 pid=2175
___slab_alloc+0x472/0x490
__slab_alloc+0x20/0x40
kmem_cache_alloc_trace+0x151/0x190
drm_dp_add_port+0x1aa/0x1ed0 [drm_kms_helper]
drm_dp_send_link_address+0x526/0x960 [drm_kms_helper]
drm_dp_check_and_send_link_address+0x1ac/0x210 [drm_kms_helper]
drm_dp_mst_link_probe_work+0x77/0xd0 [drm_kms_helper]
process_one_work+0x562/0x1350
worker_thread+0xd9/0x1390
kthread+0x1c5/0x260
ret_from_fork+0x22/0x40
INFO: Freed in drm_dp_free_mst_port+0x50/0x60 [drm_kms_helper] age=7521 cpu=0 pid=2175
__slab_free+0x17f/0x2d0
kfree+0x169/0x180
drm_dp_free_mst_port+0x50/0x60 [drm_kms_helper]
drm_dp_destroy_connector_work+0x2b8/0x490 [drm_kms_helper]
process_one_work+0x562/0x1350
worker_thread+0xd9/0x1390
kthread+0x1c5/0x260
ret_from_fork+0x22/0x40
which on this T460s, would eventually lead to kernel panics in somewhat
random places later in intel_mst_enable_dp() if we got lucky enough.
Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lyude [Wed, 13 Apr 2016 20:50:18 +0000 (16:50 -0400)]
drm/dp/mst: Restore primary hub guid on resume
commit
9dc0487d96a0396367a1451b31873482080b527f upstream.
Some hubs are forgetful, and end up forgetting whatever GUID we set
previously after we do a suspend/resume cycle. This can lead to
hotplugging breaking (along with probably other things) since the hub
will start sending connection notifications with the wrong GUID. As
such, we need to check on resume whether or not the GUID the hub is
giving us is valid.
Signed-off-by: Lyude <cpaul@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460580618-7421-1-git-send-email-cpaul@redhat.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cpaul@redhat.com [Mon, 4 Apr 2016 23:58:47 +0000 (19:58 -0400)]
drm/dp/mst: Validate port in drm_dp_payload_send_msg()
commit
deba0a2af9592b2022a0bce7b085a318b53ce1db upstream.
With the joys of things running concurrently, there's always a chance
that the port we get passed in drm_dp_payload_send_msg() isn't actually
valid anymore. Because of this, we need to make sure we validate the
reference to the port before we use it otherwise we risk running into
various race conditions. For instance, on the Dell MST monitor I have
here for testing, hotplugging it enough times causes us to kernel panic:
[drm:intel_mst_enable_dp] 1
[drm:drm_dp_update_payload_part2] payload 0 1
[drm:intel_get_hpd_pins] hotplug event received, stat 0x00200000, dig 0x10101011, pins 0x00000020
[drm:intel_hpd_irq_handler] digital hpd port B - short
[drm:intel_dp_hpd_pulse] got hpd irq on port B - short
[drm:intel_dp_check_mst_status] got esi 00 10 00
[drm:drm_dp_update_payload_part2] payload 1 1
general protection fault: 0000 [#1] SMP
…
Call Trace:
[<
ffffffffa012b632>] drm_dp_update_payload_part2+0xc2/0x130 [drm_kms_helper]
[<
ffffffffa032ef08>] intel_mst_enable_dp+0xf8/0x180 [i915]
[<
ffffffffa0310dbd>] haswell_crtc_enable+0x3ed/0x8c0 [i915]
[<
ffffffffa030c84d>] intel_atomic_commit+0x5ad/0x1590 [i915]
[<
ffffffffa01db877>] ? drm_atomic_set_crtc_for_connector+0x57/0xe0 [drm]
[<
ffffffffa01dc4e7>] drm_atomic_commit+0x37/0x60 [drm]
[<
ffffffffa0130a3a>] drm_atomic_helper_set_config+0x7a/0xb0 [drm_kms_helper]
[<
ffffffffa01cc482>] drm_mode_set_config_internal+0x62/0x100 [drm]
[<
ffffffffa01d02ad>] drm_mode_setcrtc+0x3cd/0x4e0 [drm]
[<
ffffffffa01c18e3>] drm_ioctl+0x143/0x510 [drm]
[<
ffffffffa01cfee0>] ? drm_mode_setplane+0x1b0/0x1b0 [drm]
[<
ffffffff810f79a7>] ? hrtimer_start_range_ns+0x1b7/0x3a0
[<
ffffffff81212962>] do_vfs_ioctl+0x92/0x570
[<
ffffffff81590852>] ? __sys_recvmsg+0x42/0x80
[<
ffffffff81212eb9>] SyS_ioctl+0x79/0x90
[<
ffffffff816b4e32>] entry_SYSCALL_64_fastpath+0x1a/0xa4
RIP [<
ffffffffa012b026>] drm_dp_payload_send_msg+0x146/0x1f0 [drm_kms_helper]
Which occurs because of the hotplug event shown in the log, which ends
up causing DRM's dp helpers to drop the port we're updating the payload
on and panic.
Signed-off-by: Lyude <cpaul@redhat.com>
Reviewed-by: David Airlie <airlied@linux.ie>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Skeggs [Fri, 22 Apr 2016 00:05:21 +0000 (10:05 +1000)]
drm/nouveau/gr/gf100: select a stream master to fixup tfb offset queries
commit
28dca90533750c7e31e8641c3df426bad9c12941 upstream.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Huacai Chen [Tue, 19 Apr 2016 11:19:11 +0000 (19:19 +0800)]
drm: Loongson-3 doesn't fully support wc memory
commit
221004c66a58949a0f25c937a6789c0839feb530 upstream.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vitaly Prosyak [Thu, 14 Apr 2016 17:34:03 +0000 (13:34 -0400)]
drm/radeon: fix vertical bars appear on monitor (v2)
commit
5d5b7803c49bbb01bdf4c6e95e8314d0515b9484 upstream.
When crtc/timing is disabled on boot the dig block
should be stopped in order ignore timing from crtc,
reset the steering fifo otherwise we get display
corruption or hung in dp sst mode.
v2: agd: fix coding style
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
Signed-off-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>
Jérôme Glisse [Tue, 19 Apr 2016 13:07:50 +0000 (09:07 -0400)]
drm/radeon: forbid mapping of userptr bo through radeon device file
commit
b5dcec693f87cb8475f2291c0075b2422addd3d6 upstream.
Allowing userptr bo which are basicly a list of page from some vma
(so either anonymous page or file backed page) would lead to serious
corruption of kernel structures and counters (because we overwrite
the page->mapping field when mapping buffer).
This will already block if the buffer was populated before anyone does
try to mmap it because then TTM_PAGE_FLAG_SG would be set in in the
ttm_tt flags. But that flag is check before ttm_tt_populate in the ttm
vm fault handler.
So to be safe just add a check to verify_access() callback.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Wed, 13 Apr 2016 16:08:27 +0000 (12:08 -0400)]
drm/radeon: fix initial connector audio value
commit
7403c515c49c033fec33df0814fffdc977e6acdc upstream.
This got lost somewhere along the way. This fixes
audio not working until set_property was called.
Noticed-by: Hyungwon Hwang <hyungwon.hwang7@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Thu, 14 Apr 2016 18:15:16 +0000 (14:15 -0400)]
drm/radeon: add a quirk for a XFX R9 270X
commit
bcb31eba4a4ea356fd61cbd5dec5511c3883f57e upstream.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76490
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Grigori Goronzy [Tue, 22 Mar 2016 19:48:18 +0000 (15:48 -0400)]
drm/amdgpu: fix regression on CIK (v2)
This fix was written against drm-next, but when it was
backported to 4.5 as a stable fix, the driver internal
structure change was missed. Fix that up here to avoid
a hang due to waiting for the wrong sequence number.
v2: agd: fix up commit message
Signed-off-by: Grigori Goronzy <greg@chown.ath.cx>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Sonny Jiang [Mon, 18 Apr 2016 20:05:04 +0000 (16:05 -0400)]
amdgpu/uvd: add uvd fw version for amdgpu
commit
562e2689baebaa2ac25b7ec934385480ed1cb7d6 upstream.
Was previously always hardcoded to 0.
Signed-off-by: Sonny Jiang <sonny.jiang@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>
Alex Deucher [Mon, 18 Apr 2016 22:25:34 +0000 (18:25 -0400)]
drm/amdgpu: bump the afmt limit for CZ, ST, Polaris
commit
83c5cda2ccf40a7a7e4bb674321509b346e23d5a upstream.
Fixes array overflow on these chips.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Mon, 18 Apr 2016 22:09:57 +0000 (18:09 -0400)]
drm/amdgpu: use defines for CRTCs and AMFT blocks
commit
3ea25f858fd5aeee888059952bbb8e910541eebb upstream.
Prerequiste for the next patch which ups the limits.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rex Zhu [Tue, 12 Apr 2016 11:25:52 +0000 (19:25 +0800)]
drm/amdgpu: when suspending, if uvd/vce was running. need to cancel delay work.
commit
85cc88f02eb0ecf44493c1b2ebb6f206cd5fc321 upstream.
fix the issue that when resume back, uvd/vce
dpm was disabled and uvd/vce's performace
dropped.
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@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>
Robin Murphy [Thu, 10 Mar 2016 19:28:12 +0000 (19:28 +0000)]
iommu/dma: Restore scatterlist offsets correctly
commit
07b48ac4bbe527e68cfc555f2b2b206908437141 upstream.
With the change to stashing just the IOVA-page-aligned remainder of the
CPU-page offset rather than the whole thing, the failure path in
__invalidate_sg() also needs tweaking to account for that in the case of
differing page sizes where the two offsets may not be equivalent.
Similarly in __finalise_sg(), lest the architecture-specific wrappers
later get the wrong address for cache maintenance on sync or unmap.
Fixes:
164afb1d85b8 ("iommu/dma: Use correct offset in map_sg")
Reported-by: Magnus Damm <damm+renesas@opensource.se>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joerg Roedel [Fri, 8 Apr 2016 13:12:24 +0000 (15:12 +0200)]
iommu/amd: Fix checking of pci dma aliases
commit
e3156048346c28c695f5cf9db67a8cf88c90f947 upstream.
Commit
61289cb ('iommu/amd: Remove old alias handling code')
removed the old alias handling code from the AMD IOMMU
driver because this is now handled by the IOMMU core code.
But this also removed the handling of PCI aliases, which is
not handled by the core code. This caused issues with PCI
devices that have hidden PCIe-to-PCI bridges that rewrite
the request-id.
Fix this bug by re-introducing some of the removed functions
from commit
61289cbaf6c8 and add a alias field
'struct iommu_dev_data'. This field carrys the return value
of the get_alias() function and uses that instead of the
amd_iommu_alias_table[] array in the code.
Fixes:
61289cbaf6c8 ('iommu/amd: Remove old alias handling code')
Tested-by: Tomasz Golinski <tomaszg@math.uwb.edu.pl>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Keerthy [Thu, 14 Apr 2016 04:59:16 +0000 (10:29 +0530)]
pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs
commit
56b367c0cd67d4c3006738e7dc9dda9273fd2bfe upstream.
pcs_parse_bits_in_pinctrl_entry uses ffs which gives bit indices
ranging from 1 to MAX. This leads to a corner case where we try to request
the pin number = MAX and fails.
bit_pos value is being calculted using ffs. pin_num_from_lsb uses
bit_pos value. pins array is populated with:
pin + pin_num_from_lsb.
The above is 1 more than usual bit indices as bit_pos uses ffs to compute
first set bit. Hence the last of the pins array is populated with the MAX
value and not MAX - 1 which causes error when we call pin_request.
mask_pos is rightly calculated as ((pcs->fmask) << (bit_pos - 1))
Consequently val_pos and submask are correct.
Hence use __ffs which gives (ffs(x) - 1) as the first bit set.
fixes:
4e7e8017a8 ("pinctrl: pinctrl-single: enhance to configure multiple pins of different modules")
Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yingjoe Chen [Sat, 2 Apr 2016 06:57:49 +0000 (14:57 +0800)]
pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce
commit
5fedbb923936174ab4d1d5cc92bca1cf6b2e0ca2 upstream.
The debounce time unit for gpio_chip.set_debounce is us but
mtk_gpio_set_debounce regard it as ms.
Fix this by correct debounce time array dbnc_arr so it can find correct
debounce setting. Debounce time for first debounce setting is 500us,
correct this as well.
While I'm at it, also change the debounce time array name to
"debounce_time" for readability.
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arnd Bergmann [Tue, 16 Feb 2016 15:03:23 +0000 (16:03 +0100)]
xen kconfig: don't "select INPUT_XEN_KBDDEV_FRONTEND"
commit
13aa38e291bdd4e4018f40dd2f75e464814dcbf3 upstream.
The Xen framebuffer driver selects the xen keyboard driver, so the latter
will be built-in if XEN_FBDEV_FRONTEND=y. However, when CONFIG_INPUT
is a loadable module, this configuration cannot work. On mainline kernels,
the symbol will be enabled but not used, while in combination with
a patch I have to detect such useless configurations, we get the
expected link failure:
drivers/input/built-in.o: In function `xenkbd_remove':
xen-kbdfront.c:(.text+0x2f0): undefined reference to `input_unregister_device'
xen-kbdfront.c:(.text+0x30e): undefined reference to `input_unregister_device'
This removes the extra "select", as it just causes more trouble than
it helps. In theory, some defconfig file might break if it has
XEN_FBDEV_FRONTEND in it but not INPUT_XEN_KBDDEV_FRONTEND. The Kconfig
fragment we ship in the kernel (kernel/configs/xen.config) however
already enables both, and anyone using an old .config file would
keep having both enabled.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: David Vrabel <david.vrabel@citrix.com>
Fixes:
36c1132e34bd ("xen kconfig: fix select INPUT_XEN_KBDDEV_FRONTEND")
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd [Sun, 17 Apr 2016 12:21:42 +0000 (05:21 -0700)]
Input: pmic8xxx-pwrkey - fix algorithm for converting trigger delay
commit
eda5ecc0a6b865561997e177c393f0b0136fe3b7 upstream.
The trigger delay algorithm that converts from microseconds to
the register value looks incorrect. According to most of the PMIC
documentation, the equation is
delay (Seconds) = (1 / 1024) * 2 ^ (x + 4)
except for one case where the documentation looks to have a
formatting issue and the equation looks like
delay (Seconds) = (1 / 1024) * 2 x + 4
Most likely this driver was written with the improper
documentation to begin with. According to the downstream sources
the valid delays are from 2 seconds to 1/64 second, and the
latter equation just doesn't make sense for that. Let's fix the
algorithm and the range check to match the documentation and the
downstream sources.
Reported-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Fixes:
92d57a73e410 ("input: Add support for Qualcomm PMIC8XXX power key")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vladis Dronov [Thu, 31 Mar 2016 17:53:42 +0000 (10:53 -0700)]
Input: gtco - fix crash on detecting device without endpoints
commit
162f98dea487206d9ab79fc12ed64700667a894d upstream.
The gtco driver expects at least one valid endpoint. If given malicious
descriptors that specify 0 for the number of endpoints, it will crash in
the probe function. Ensure there is at least one endpoint on the interface
before using it.
Also let's fix a minor coding style issue.
The full correct report of this issue can be found in the public
Red Hat Bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=
1283385
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Ivanov [Thu, 7 Apr 2016 07:31:38 +0000 (09:31 +0200)]
netlink: don't send NETLINK_URELEASE for unbound sockets
commit
e27260203912b40751fa353d009eaa5a642c739f upstream.
All existing users of NETLINK_URELEASE use it to clean up resources that
were previously allocated to a socket via some command. As a result, no
users require getting this notification for unbound sockets.
Sending it for unbound sockets, however, is a problem because any user
(including unprivileged users) can create a socket that uses the same ID
as an existing socket. Binding this new socket will fail, but if the
NETLINK_URELEASE notification is generated for such sockets, the users
thereof will be tricked into thinking the socket that they allocated the
resources for is closed.
In the nl80211 case, this will cause destruction of virtual interfaces
that still belong to an existing hostapd process; this is the case that
Dmitry noticed. In the NFC case, it will cause a poll abort. In the case
of netlink log/queue it will cause them to stop reporting events, as if
NFULNL_CFG_CMD_UNBIND/NFQNL_CFG_CMD_UNBIND had been called.
Fix this problem by checking that the socket is bound before generating
the NETLINK_URELEASE notification.
Signed-off-by: Dmitry Ivanov <dima@ubnt.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Ivanov [Wed, 6 Apr 2016 14:23:18 +0000 (17:23 +0300)]
nl80211: check netlink protocol in socket release notification
commit
8f815cdde3e550e10c2736990d791f60c2ce43eb upstream.
A non-privileged user can create a netlink socket with the same port_id as
used by an existing open nl80211 netlink socket (e.g. as used by a hostapd
process) with a different protocol number.
Closing this socket will then lead to the notification going to nl80211's
socket release notification handler, and possibly cause an action such as
removing a virtual interface.
Fix this issue by checking that the netlink protocol is NETLINK_GENERIC.
Since generic netlink has no notifier chain of its own, we can't fix the
problem more generically.
Fixes:
026331c4d9b5 ("cfg80211/mac80211: allow registering for and sending action frames")
Signed-off-by: Dmitry Ivanov <dima@ubnt.com>
[rewrite commit message]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Anton Blanchard [Fri, 15 Apr 2016 02:08:19 +0000 (12:08 +1000)]
powerpc: Update TM user feature bits in scan_features()
commit
4705e02498d6d5a7ab98dfee9595cd5e91db2017 upstream.
We need to update the user TM feature bits (PPC_FEATURE2_HTM and
PPC_FEATURE2_HTM) to mirror what we do with the kernel TM feature
bit.
At the moment, if firmware reports TM is not available we turn off
the kernel TM feature bit but leave the userspace ones on. Userspace
thinks it can execute TM instructions and it dies trying.
This (together with a QEMU patch) fixes PR KVM, which doesn't currently
support TM.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Anton Blanchard [Fri, 15 Apr 2016 02:07:24 +0000 (12:07 +1000)]
powerpc: Update cpu_user_features2 in scan_features()
commit
beff82374b259d726e2625ec6c518a5f2613f0ae upstream.
scan_features() updates cpu_user_features but not cpu_user_features2.
Amongst other things, cpu_user_features2 contains the user TM feature
bits which we must keep in sync with the kernel TM feature bit.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Anton Blanchard [Fri, 15 Apr 2016 02:06:13 +0000 (12:06 +1000)]
powerpc: scan_features() updates incorrect bits for REAL_LE
commit
6997e57d693b07289694239e52a10d2f02c3a46f upstream.
The REAL_LE feature entry in the ibm_pa_feature struct is missing an MMU
feature value, meaning all the remaining elements initialise the wrong
values.
This means instead of checking for byte 5, bit 0, we check for byte 0,
bit 0, and then we incorrectly set the CPU feature bit as well as MMU
feature bit 1 and CPU user feature bits 0 and 2 (5).
Checking byte 0 bit 0 (IBM numbering), means we're looking at the
"Memory Management Unit (MMU)" feature - ie. does the CPU have an MMU.
In practice that bit is set on all platforms which have the property.
This means we set CPU_FTR_REAL_LE always. In practice that seems not to
matter because all the modern cpus which have this property also
implement REAL_LE, and we've never needed to disable it.
We're also incorrectly setting MMU feature bit 1, which is:
#define MMU_FTR_TYPE_8xx 0x00000002
Luckily the only place that looks for MMU_FTR_TYPE_8xx is in Book3E
code, which can't run on the same cpus as scan_features(). So this also
doesn't matter in practice.
Finally in the CPU user feature mask, we're setting bits 0 and 2. Bit 2
is not currently used, and bit 0 is:
#define PPC_FEATURE_PPC_LE 0x00000001
Which says the CPU supports the old style "PPC Little Endian" mode.
Again this should be harmless in practice as no 64-bit CPUs implement
that mode.
Fix the code by adding the missing initialisation of the MMU feature.
Also add a comment marking CPU user feature bit 2 (0x4) as reserved. It
would be unsafe to start using it as old kernels incorrectly set it.
Fixes:
44ae3ab3358e ("powerpc: Free up some CPU feature bits by moving out MMU-related features")
Signed-off-by: Anton Blanchard <anton@samba.org>
[mpe: Flesh out changelog, add comment reserving 0x4]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Horia Geant? [Tue, 19 Apr 2016 17:33:48 +0000 (20:33 +0300)]
crypto: talitos - fix AEAD tcrypt tests
commit
340ff60ae93a5db2b2be6f38868df9a1293b6007 upstream.
After conversion to new AEAD interface, tcrypt tests fail as follows:
[...]
[ 1.145414] alg: aead: Test 1 failed on encryption for authenc-hmac-sha1-cbc-aes-talitos
[ 1.153564]
00000000: 53 69 6e 67 6c 65 20 62 6c 6f 63 6b 20 6d 73 67
[ 1.160041]
00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 1.166509]
00000020: 00 00 00 00
[...]
Fix them by providing the correct cipher in & cipher out pointers,
i.e. must skip over associated data in src and dst S/G.
While here, fix a problem with the HW S/G table index usage:
tbl_off must be updated after the pointer to the table entries is set.
Fixes:
aeb4c132f33d ("crypto: talitos - Convert to new AEAD interface")
Reported-by: Jonas Eymann <J.Eymann@gmx.net>
Signed-off-by: Horia Geant? <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jonas Eymann [Tue, 19 Apr 2016 17:33:47 +0000 (20:33 +0300)]
crypto: talitos - fix crash in talitos_cra_init()
commit
89d124cb61b39900959e2839ac06b6339b6a54cb upstream.
Conversion of talitos driver to the new AEAD interface
hasn't been properly tested.
AEAD algorithms crash in talitos_cra_init as follows:
[...]
[ 1.141095] talitos
ffe30000.crypto: hwrng
[ 1.145381] Unable to handle kernel paging request for data at address 0x00000058
[ 1.152913] Faulting instruction address: 0xc02accc0
[ 1.157910] Oops: Kernel access of bad area, sig: 11 [#1]
[ 1.163315] SMP NR_CPUS=2 P1020 RDB
[ 1.166810] Modules linked in:
[ 1.169875] CPU: 0 PID: 1007 Comm: cryptomgr_test Not tainted 4.4.6 #1
[ 1.176415] task:
db5ec200 ti:
db4d6000 task.ti:
db4d6000
[ 1.181821] NIP:
c02accc0 LR:
c02acd18 CTR:
c02acd04
[ 1.186793] REGS:
db4d7d30 TRAP: 0300 Not tainted (4.4.6)
[ 1.192457] MSR:
00029000 <CE,EE,ME> CR:
95009359 XER:
e0000000
[ 1.198585] DEAR:
00000058 ESR:
00000000
GPR00:
c017bdc0 db4d7de0 db5ec200 df424b48 00000000 00000000 df424bfc db75a600
GPR08:
df424b48 00000000 db75a628 db4d6000 00000149 00000000 c0044cac db5acda0
GPR16:
00000000 00000000 00000000 00000000 00000000 00000000 00000400 df424940
GPR24:
df424900 00003083 00000400 c0180000 db75a640 c03e9f84 df424b40 df424b48
[ 1.230978] NIP [
c02accc0] talitos_cra_init+0x28/0x6c
[ 1.236039] LR [
c02acd18] talitos_cra_init_aead+0x14/0x28
[ 1.241443] Call Trace:
[ 1.243894] [
db4d7de0] [
c03e9f84] 0xc03e9f84 (unreliable)
[ 1.249322] [
db4d7df0] [
c017bdc0] crypto_create_tfm+0x5c/0xf0
[ 1.255083] [
db4d7e10] [
c017beec] crypto_alloc_tfm+0x98/0xf8
[ 1.260769] [
db4d7e40] [
c0186a20] alg_test_aead+0x28/0xc8
[ 1.266181] [
db4d7e60] [
c0186718] alg_test+0x260/0x2e0
[ 1.271333] [
db4d7ee0] [
c0183860] cryptomgr_test+0x30/0x54
[ 1.276843] [
db4d7ef0] [
c0044d80] kthread+0xd4/0xd8
[ 1.281741] [
db4d7f40] [
c000e4a4] ret_from_kernel_thread+0x5c/0x64
[ 1.287930] Instruction dump:
[ 1.290902]
38600000 4e800020 81230028 7c681b78 81490010 38e9ffc0 3929ffe8 554a073e
[ 1.298691]
2b8a000a 7d474f9e 812a0008 91230030 <
80e90058>
39270060 7c0004ac 7cc04828
Fixes:
aeb4c132f33d ("crypto: talitos - Convert to new AEAD interface")
Signed-off-by: Jonas Eymann <J.Eymann@gmx.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix typo - replaced parameter of __crypto_ahash_alg(): s/tfm/alg
Remove checkpatch warnings.
Add commit message.
Signed-off-by: Horia Geant? <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Xiaodong Liu [Tue, 12 Apr 2016 09:45:51 +0000 (09:45 +0000)]
crypto: sha1-mb - use corrcet pointer while completing jobs
commit
0851561d9c965df086ef8a53f981f5f95a57c2c8 upstream.
In sha_complete_job, incorrect mcryptd_hash_request_ctx pointer is used
when check and complete other jobs. If the memory of first completed req
is freed, while still completing other jobs in the func, kernel will
crash since NULL pointer is assigned to RIP.
Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tom Lendacky [Wed, 13 Apr 2016 15:52:25 +0000 (10:52 -0500)]
crypto: ccp - Prevent information leakage on export
commit
f709b45ec461b548c41a00044dba1f1b572783bf upstream.
Prevent information from leaking to userspace by doing a memset to 0 of
the export state structure before setting the structure values and copying
it. This prevents un-initialized padding areas from being copied into the
export area.
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Matti Gottlieb [Tue, 15 Mar 2016 11:46:47 +0000 (13:46 +0200)]
iwlwifi: mvm: fix memory leak in paging
commit
7fdf9663261cc77a516396fec82cee8a8ea07e76 upstream.
Currently paging download buffer is freed during the
the unloading of the opmode which happens when the driver
is unloaded.
This causes a memory leak since the paging download
buffer is allocated every time we enable the
interface, so the download buffer can be allocated many
times, but only be freed once.
Free paging download buffer during disabling of the
interface.
Signed-off-by: Matti Gottlieb <matti.gottlieb@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Emmanuel Grumbach [Thu, 10 Mar 2016 11:07:17 +0000 (13:07 +0200)]
iwlwifi: pcie: lower the debug level for RSA semaphore access
commit
9fc515bc9e735c10cd327f05c20f5ef69474188d upstream.
IWL_INFO is not an error but still printed by default.
"can't access the RSA semaphore it is write protected" seems
worrisome but it is not really a problem.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sebastian Ott [Thu, 31 Mar 2016 09:48:31 +0000 (11:48 +0200)]
s390/pci: add extra padding to function measurement block
commit
9d89d9e61d361f3adb75e1aebe4bb367faf16cfa upstream.
Newer machines might use a different (larger) format for function
measurement blocks. To ensure that we comply with the alignment
requirement on these machines and prevent memory corruption (when
firmware writes more data than we expect) add 16 padding bytes
at the end of the fmb.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Srinivas Pandruvada [Sat, 23 Apr 2016 02:53:59 +0000 (19:53 -0700)]
cpufreq: intel_pstate: Fix processing for turbo activation ratio
commit
1becf03545a0859ceaaf9e8c2d9861882a71cb01 upstream.
When the config TDP level is not nominal (level = 0), the MSR values for
reading level 1 and level 2 ratios contain power in low 14 bits and actual
ratio bits are at bits [23:16]. The current processing for level 1 and
level 2 is wrong as there is no shift done to get actual ratio.
Fixes:
6a35fc2d6c22 (cpufreq: intel_pstate: get P1 from TAR when available)
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Mon, 25 Apr 2016 17:12:18 +0000 (13:12 -0400)]
Revert "drm/amdgpu: disable runtime pm on PX laptops without dGPU power control"
commit
e9bef455af8eb0e837e179aab8988ae2649fd8d3 upstream.
This reverts commit
bedf2a65c1aa8fb29ba8527fd00c0f68ec1f55f1.
See the radeon revert for an extended description.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alex Deucher [Mon, 18 Apr 2016 15:19:19 +0000 (11:19 -0400)]
Revert "drm/radeon: disable runtime pm on PX laptops without dGPU power control"
commit
bfaddd9fc8ac048b99475f000dbef6f08297417f upstream.
This reverts commit
e64c952efb8e0c15ae82cec8e455ab4910690ef1.
ATPX is the ACPI method for controlling AMD PowerXpress laptops.
There are flags to indicate which methods are supported. If
the dGPU power down flag is not supported, the driver needs to
implement the dGPU power down manually. We had previously
always forced the driver to assume the ATPX dGPU power down
was present, but this causes problems on boards where it is
not, leading to GPU hangs when attempting to power down the
dGPU. Manual dGPU power down is not currently supported in
the Linux driver. Some laptops indicate that the ATPX
dGPU power down method is not present, but it actually
apparently is. I'm not sure if this is a bios bug and it should
be set or if there is a reason it was unset and the method should
not be used. This is not an issue on other OSes since both the
ATPX and the manual driver power down methods are supported.
This is apparently fairly widespread, so just revert for now.
bugs:
https://bugzilla.kernel.org/show_bug.cgi?id=115321
https://bugzilla.kernel.org/show_bug.cgi?id=116581
https://bugzilla.kernel.org/show_bug.cgi?id=116251
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lyude [Wed, 16 Mar 2016 19:18:04 +0000 (15:18 -0400)]
drm/i915: Fix race condition in intel_dp_destroy_mst_connector()
commit
9e60290dbafdf577766e5fc5f2fdb3be450cf9a6 upstream.
After unplugging a DP MST display from the system, we have to go through
and destroy all of the DRM connectors associated with it since none of
them are valid anymore. Unfortunately, intel_dp_destroy_mst_connector()
doesn't do a good enough job of ensuring that throughout the destruction
process that no modesettings can be done with the connectors. As it is
right now, intel_dp_destroy_mst_connector() works like this:
* Take all modeset locks
* Clear the configuration of the crtc on the connector, if there is one
* Drop all modeset locks, this is required because of circular
dependency issues that arise with trying to remove the connector from
sysfs with modeset locks held
* Unregister the connector
* Take all modeset locks, again
* Do the rest of the required cleaning for destroying the connector
* Finally drop all modeset locks for good
This only works sometimes. During the destruction process, it's very
possible that a userspace application will attempt to do a modesetting
using the connector. When we drop the modeset locks, an ioctl handler
such as drm_mode_setcrtc has the oppurtunity to take all of the modeset
locks from us. When this happens, one thing leads to another and
eventually we end up committing a mode with the non-existent connector:
[drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training
[drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7cf0001f
[drm:intel_dp_start_link_train [i915]] *ERROR* failed to start channel equalization
[drm:intel_dp_aux_ch] dp_aux_ch timeout status 0x7cf0001f
[drm:intel_mst_pre_enable_dp [i915]] *ERROR* failed to allocate vcpi
And in some cases, such as with the T460s using an MST dock, this
results in breaking modesetting and/or panicking the system.
To work around this, we now unregister the connector at the very
beginning of intel_dp_destroy_mst_connector(), grab all the modesetting
locks, and then hold them until we finish the rest of the function.
Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Rob Clark <rclark@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1458155884-13877-1-git-send-email-cpaul@redhat.com
(cherry picked from commit
1f7717552ef1306be3b7ed28c66c6eff550e3a23)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
John Keeping [Wed, 18 Nov 2015 11:17:25 +0000 (11:17 +0000)]
drm/qxl: fix cursor position with non-zero hotspot
commit
d59a1f71ff1aeda4b4630df92d3ad4e3b1dfc885 upstream.
The SPICE protocol considers the position of a cursor to be the location
of its active pixel on the display, so the cursor is drawn with its
top-left corner at "(x - hot_spot_x, y - hot_spot_y)" but the DRM cursor
position gives the location where the top-left corner should be drawn,
with the hotspot being a hint for drivers that need it.
This fixes the location of the window resize cursors when using Fluxbox
with the QXL DRM driver and both the QXL and modesetting X drivers.
Signed-off-by: John Keeping <john@metanate.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1447845445-2116-1-git-send-email-john@metanate.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ilia Mirkin [Sun, 6 Mar 2016 21:06:06 +0000 (16:06 -0500)]
drm/nouveau/core: use vzalloc for allocating ramht
commit
78a121d82da8aff3aca2a6a1c40f5061081760f0 upstream.
Most calls to nvkm_ramht_new use 0x8000 as the size. This results in a
fairly sizeable chunk of memory to be allocated, which may not be
available with kzalloc. Since this is done fairly rarely (once per
channel), use vzalloc instead.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: Sven Joachim <svenjoac@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Davidlohr Bueso [Thu, 21 Apr 2016 03:09:24 +0000 (20:09 -0700)]
futex: Acknowledge a new waiter in counter before plist
commit
fe1bce9e2107ba3a8faffe572483b6974201a0e6 upstream.
Otherwise an incoming waker on the dest hash bucket can miss
the waiter adding itself to the plist during the lockless
check optimization (small window but still the correct way
of doing this); similarly to the decrement counterpart.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: bigeasy@linutronix.de
Cc: dvhart@infradead.org
Link: http://lkml.kernel.org/r/1461208164-29150-1-git-send-email-dave@stgolabs.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sebastian Andrzej Siewior [Fri, 15 Apr 2016 12:35:39 +0000 (14:35 +0200)]
futex: Handle unlock_pi race gracefully
commit
89e9e66ba1b3bde9d8ea90566c2aee20697ad681 upstream.
If userspace calls UNLOCK_PI unconditionally without trying the TID -> 0
transition in user space first then the user space value might not have the
waiters bit set. This opens the following race:
CPU0 CPU1
uval = get_user(futex)
lock(hb)
lock(hb)
futex |= FUTEX_WAITERS
....
unlock(hb)
cmpxchg(futex, uval, newval)
So the cmpxchg fails and returns -EINVAL to user space, which is wrong because
the futex value is valid.
To handle this (yes, yet another) corner case gracefully, check for a flag
change and retry.
[ tglx: Massaged changelog and slightly reworked implementation ]
Fixes:
ccf9e6a80d9e ("futex: Make unlock_pi more robust")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1460723739-5195-1-git-send-email-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Romain Perier [Thu, 14 Apr 2016 13:36:03 +0000 (15:36 +0200)]
asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()
commit
fba7cd681b6155e2d93e7862fcd6f970336b83c3 upstream.
The recent decoupling of pagefault disable and preempt disable added an
explicit preempt_disable/enable() pair to the futex_atomic_cmpxchg_inatomic()
implementation in asm-generic/futex.h. But it forgot to add preempt_enable()
calls to the error handling code pathes, which results in a preemption count
imbalance.
This is observable on boot when the test for atomic_cmpxchg() is calling
futex_atomic_cmpxchg_inatomic() on a NULL pointer.
Add the missing preempt_enable() calls to the error handling code pathes.
[ tglx: Massaged changelog ]
Fixes:
d9b9ff8c1889 ("sched/preempt, futex: Disable preemption in UP futex_atomic_cmpxchg_inatomic() explicitly")
Signed-off-by: Romain Perier <romain.perier@free-electrons.com>
Cc: linux-arch@vger.kernel.org
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1460640963-690-1-git-send-email-romain.perier@free-electrons.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Conrad Kostecki [Tue, 26 Apr 2016 08:08:10 +0000 (10:08 +0200)]
ALSA: hda - Add dock support for ThinkPad X260
commit
037e119738120c1cdc460c6ae33871c3000531f3 upstream.
Fixes audio output on a ThinkPad X260, when using Lenovo CES 2013
docking station series (basic, pro, ultra).
Signed-off-by: Conrad Kostecki <ck+linuxkernel@bl4ckb0x.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Thu, 21 Apr 2016 15:37:54 +0000 (17:37 +0200)]
ALSA: pcxhr: Fix missing mutex unlock
commit
67f3754b51f22b18c4820fb84062f658c30e8644 upstream.
The commit [
9bef72bdb26e: ALSA: pcxhr: Use nonatomic PCM ops]
converted to non-atomic PCM ops, but shamelessly with an unbalanced
mutex locking, which leads to the hangup easily. Fix it.
Fixes:
9bef72bdb26e ('ALSA: pcxhr: Use nonatomic PCM ops')
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116441
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lu, Han [Wed, 20 Apr 2016 02:08:43 +0000 (10:08 +0800)]
ALSA: hda - add PCI ID for Intel Broxton-T
commit
9859a971ca228725425238756ee89c6133306ec8 upstream.
Add HD Audio Device PCI ID for the Intel Broxton-T platform.
It is an HDA Intel PCH controller.
Signed-off-by: Lu, Han <han.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Tue, 19 Apr 2016 20:07:50 +0000 (22:07 +0200)]
ALSA: hda - Keep powering up ADCs on Cirrus codecs
commit
de3df8a986b635082a1d94bae2c361d043c57106 upstream.
Although one weird behavior about the input path (inconsistent D0/D3
switch) on Cirrus CS420x codecs was fixed in the previous commit,
there is still an issue on some Mac machines: the capture stream
stalls when switching the ADCs on the fly. More badly, this keeps
stuck until the next reboot.
The dynamic ADC switching is already a bit fragile and assuming
optimistically that the chip accepts the frequent power changes. On
Cirrus codecs, this doesn't seem applicable.
As a quick workaround, we pin down the ADCs to keep up in D0 when
spec->dyn_adc_switch is set. In this way, the ADCs are kept up only
for the system that were confirmed to be broken.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116171
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bastien Nocera [Mon, 18 Apr 2016 09:10:42 +0000 (11:10 +0200)]
ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m
commit
afecb146d8d8a60a1dde9cdf570c278649617fde upstream.
The Optiplex 9020m with Haswell-DT processor needs a quirk for the
headset jack at the front of the machine to be able to use microphones.
A quirk for this model was originally added in
3127899, but
c77900e
removed it in favour of a more generic version.
Unfortunately, pin configurations can changed based on firmware/BIOS
versions, and the generic version doesn't have any effect on newer
versions of the machine/firmware anymore.
With help from David Henningsson <diwic@ubuntu.com>
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Sun, 17 Apr 2016 07:39:41 +0000 (09:39 +0200)]
ALSA: hda - Don't trust the reported actual power state
commit
50fd4987c4f3c3ebf0ce94d932732011bbdc7c71 upstream.
We've got a regression report that the recording on Mac with a cirrus
codec doesn't work any longer. This turned out to be the missing
power up to D0 by power_save_node enablement.
After analyzing the traces, we found out that the culprit is that the
codec advertises the "actual" power state of a few nodes to be D0
while the "target" power state is D3. This inconsistency is usually
OK, as it implies the power transition. But in the case of cirrus
codec, this seems to be stuck to D3 while it's not actually D0.
This patch addresses the issue by checking the power state difference
more strictly. It sends the power-state change verb unless both the
target and the actual power states show the given value.
We may introduce yet another flag indicating the possible broken
hardware power state, but it's anyway safer to set the proper power
state even in a transition (at least it's harmless as long as the
target state is same). So this simpler change was applied now.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=116171
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tony Luck [Thu, 14 Apr 2016 17:21:52 +0000 (10:21 -0700)]
x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address
commit
ff15e95c82768d589957dbb17d7eb7dba7904659 upstream.
In commit:
eb1af3b71f9d ("Fix computation of channel address")
I switched the "sck_way" variable from holding the log2 value read
from the h/w to instead be the actual number. Unfortunately it
is needed in log2 form when used to shift the address.
Tested-by: Patrick Geary <patrickg@supermicro.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Aristeu Rozanski <arozansk@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-edac@vger.kernel.org
Fixes:
eb1af3b71f9d ("Fix computation of channel address")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jan Beulich [Thu, 21 Apr 2016 06:27:04 +0000 (00:27 -0600)]
x86/mm/xen: Suppress hugetlbfs in PV guests
commit
103f6112f253017d7062cd74d17f4a514ed4485c upstream.
Huge pages are not normally available to PV guests. Not suppressing
hugetlbfs use results in an endless loop of page faults when user mode
code tries to access a hugetlbfs mapped area (since the hypervisor
denies such PTEs to be created, but error indications can't be
propagated out of xen_set_pte_at(), just like for various of its
siblings), and - once killed in an oops like this:
kernel BUG at .../fs/hugetlbfs/inode.c:428!
invalid opcode: 0000 [#1] SMP
...
RIP: e030:[<
ffffffff811c333b>] [<
ffffffff811c333b>] remove_inode_hugepages+0x25b/0x320
...
Call Trace:
[<
ffffffff811c3415>] hugetlbfs_evict_inode+0x15/0x40
[<
ffffffff81167b3d>] evict+0xbd/0x1b0
[<
ffffffff8116514a>] __dentry_kill+0x19a/0x1f0
[<
ffffffff81165b0e>] dput+0x1fe/0x220
[<
ffffffff81150535>] __fput+0x155/0x200
[<
ffffffff81079fc0>] task_work_run+0x60/0xa0
[<
ffffffff81063510>] do_exit+0x160/0x400
[<
ffffffff810637eb>] do_group_exit+0x3b/0xa0
[<
ffffffff8106e8bd>] get_signal+0x1ed/0x470
[<
ffffffff8100f854>] do_signal+0x14/0x110
[<
ffffffff810030e9>] prepare_exit_to_usermode+0xe9/0xf0
[<
ffffffff814178a5>] retint_user+0x8/0x13
This is CVE-2016-3961 / XSA-174.
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Juergen Gross <JGross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>
Link: http://lkml.kernel.org/r/57188ED802000078000E431C@prv-mh.provo.novell.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Catalin Marinas [Wed, 9 Mar 2016 16:31:29 +0000 (16:31 +0000)]
arm64: Update PTE_RDONLY in set_pte_at() for PROT_NONE permission
commit
fdc69e7df3cb24f18a93192641786e5b7ecd1dfe upstream.
The set_pte_at() function must update the hardware PTE_RDONLY bit
depending on the state of the PTE_WRITE and PTE_DIRTY bits of the given
entry value. However, it currently only performs this for pte_valid()
entries, ignoring PTE_PROT_NONE. The side-effect is that PROT_NONE
mappings would not have the PTE_RDONLY bit set. Without
CONFIG_ARM64_HW_AFDBM, this is not an issue since such PROT_NONE pages
are not accessible anyway.
With commit
2f4b829c625e ("arm64: Add support for hardware updates of
the access and dirty pte bits"), the ptep_set_wrprotect() function was
re-written to cope with automatic hardware updates of the dirty state.
As an optimisation, only PTE_RDONLY is checked to assess the "dirty"
status. Since set_pte_at() does not set this bit for PROT_NONE mappings,
such pages may be considered "dirty" as a result of
ptep_set_wrprotect().
This patch updates the pte_valid() check to pte_present() in
set_pte_at(). It also adds PTE_PROT_NONE to the swap entry bits comment.
Fixes:
2f4b829c625e ("arm64: Add support for hardware updates of the access and dirty pte bits")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com>
Tested-by: Ganapatrao Kulkarni <gkulkarni@cavium.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Catalin Marinas [Thu, 7 Jan 2016 16:07:20 +0000 (16:07 +0000)]
arm64: Honour !PTE_WRITE in set_pte_at() for kernel mappings
commit
ac15bd63bbb24238f763ec5b24ee175ec301e8cd upstream.
Currently, set_pte_at() only checks the software PTE_WRITE bit for user
mappings when it sets or clears the hardware PTE_RDONLY accordingly. The
kernel ptes are written directly without any modification, relying
solely on the protection bits in macros like PAGE_KERNEL. However,
modifying kernel pte attributes via pte_wrprotect() would be ignored by
set_pte_at(). Since pte_wrprotect() does not set PTE_RDONLY (it only
clears PTE_WRITE), the new permission is not taken into account.
This patch changes set_pte_at() to adjust the read-only permission for
kernel ptes as well. As a side effect, existing PROT_* definitions used
for kernel ioremap*() need to include PTE_DIRTY | PTE_WRITE.
(additionally, white space fix for PTE_KERNEL_ROX)
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Zijlstra [Wed, 16 Mar 2016 15:22:45 +0000 (16:22 +0100)]
sched/cgroup: Fix/cleanup cgroup teardown/init
commit
2f5177f0fd7e531b26d54633be62d1d4cb94621c upstream.
The CPU controller hasn't kept up with the various changes in the whole
cgroup initialization / destruction sequence, and commit:
2e91fa7f6d45 ("cgroup: keep zombies associated with their original cgroups")
caused it to explode.
The reason for this is that zombies do not inhibit css_offline() from
being called, but do stall css_released(). Now we tear down the cfs_rq
structures on css_offline() but zombies can run after that, leading to
use-after-free issues.
The solution is to move the tear-down to css_released(), which
guarantees nobody (including no zombies) is still using our cgroup.
Furthermore, a few simple cleanups are possible too. There doesn't
appear to be any point to us using css_online() (anymore?) so fold that
in css_alloc().
And since cgroup code guarantees an RCU grace period between
css_released() and css_free() we can forgo using call_rcu() and free the
stuff immediately.
Suggested-by: Tejun Heo <tj@kernel.org>
Reported-by: Kazuki Yamaguchi <k@rhe.jp>
Reported-by: Niklas Cassel <niklas.cassel@axis.com>
Tested-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes:
2e91fa7f6d45 ("cgroup: keep zombies associated with their original cgroups")
Link: http://lkml.kernel.org/r/20160316152245.GY6344@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Robert Jarzmik [Mon, 15 Feb 2016 20:57:48 +0000 (21:57 +0100)]
dmaengine: pxa_dma: fix the maximum requestor line
commit
6bab1c6afdca0371cfa957079b36b78d12dd2cf5 upstream.
The current number of requestor lines is limited to 31. This was an
error of a previous commit, as this number is platform dependent, and is
actually :
- for pxa25x: 40 requestor lines
- for pxa27x: 75 requestor lines
- for pxa3xx: 100 requestor lines
The previous testing did not reveal the faulty constant as on pxa[23]xx
platforms, only camera, MSL and USB are above requestor 32, and in these
only the camera has a driver using dma.
Fixes:
e87ffbdf0697 ("dmaengine: pxa_dma: fix the no-requestor case")
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Fri, 18 Mar 2016 12:26:32 +0000 (14:26 +0200)]
dmaengine: hsu: correct use of channel status register
commit
4f4bc0abff79dc9d7ccbd3143adbf8ad1f4fe6ab upstream.
There is a typo in documentation regarding to descriptor empty bit (DESCE)
which is set to 1 when descriptor is empty. Thus, status register at the end of
a transfer usually returns all DESCE bits set and thus it will never be zero.
Moreover, there are 2 bits (CDESC) that encode current descriptor, on which
interrupt has been asserted. In case when we have few descriptors programmed we
might have non-zero value.
Remove DESCE and CDESC bits from DMA channel status register (HSU_CH_SR) when
reading it.
Fixes:
2b49e0c56741 ("dmaengine: append hsu DMA driver")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andy Shevchenko [Fri, 8 Apr 2016 13:22:17 +0000 (16:22 +0300)]
dmaengine: dw: fix master selection
commit
3fe6409c23e2bee4b2b1b6d671d2da8daa15271c upstream.
The commit
895005202987 ("dmaengine: dw: apply both HS interfaces and remove
slave_id usage") cleaned up the code to avoid usage of depricated slave_id
member of generic slave configuration.
Meanwhile it broke the master selection by removing important call to
dwc_set_masters() in ->device_alloc_chan_resources() which copied masters from
custom slave configuration to the internal channel structure.
Everything works until now since there is no customized connection of
DesignWare DMA IP to the bus, i.e. one bus and one or more masters are in use.
The configurations where 2 masters are connected to the different masters are
not working anymore. We are expecting one user of such configuration and need
to select masters properly. Besides that it is obviously a performance
regression since only one master is in use in multi-master configuration.
Select masters in accordance with what user asked for. Keep this patch in a form
more suitable for back porting.
We are safe to take necessary data in ->device_alloc_chan_resources() because
we don't support generic slave configuration embedded into custom one, and thus
the only way to provide such is to use the parameter to a filter function which
is called exactly before channel resource allocation.
While here, replase BUG_ON to less noisy dev_warn() and prevent channel
allocation in case of error.
Fixes:
895005202987 ("dmaengine: dw: apply both HS interfaces and remove slave_id usage")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Seth Forshee [Wed, 9 Mar 2016 15:18:07 +0000 (09:18 -0600)]
debugfs: Make automount point inodes permanently empty
commit
87243deb88671f70def4c52dfa7ca7830707bd31 upstream.
Starting with 4.1 the tracing subsystem has its own filesystem
which is automounted in the tracing subdirectory of debugfs.
Prior to this debugfs could be bind mounted in a cloned mount
namespace, but if tracefs has been mounted under debugfs this
now fails because there is a locked child mount. This creates
a regression for container software which bind mounts debugfs
to satisfy the assumption of some userspace software.
In other pseudo filesystems such as proc and sysfs we're already
creating mountpoints like this in such a way that no dirents can
be created in the directories, allowing them to be exceptions to
some MNT_LOCKED tests. In fact we're already do this for the
tracefs mountpoint in sysfs.
Do the same in debugfs_create_automount(), since the intention
here is clearly to create a mountpoint. This fixes the regression,
as locked child mounts on permanently empty directories do not
cause a bind mount to fail.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rui Salvaterra [Sat, 9 Apr 2016 21:05:34 +0000 (22:05 +0100)]
lib: lz4: fixed zram with lz4 on big endian machines
commit
3e26a691fe3fe1e02a76e5bab0c143ace4b137b4 upstream.
Based on Sergey's test patch [1], this fixes zram with lz4 compression
on big endian cpus.
Note that the 64-bit preprocessor test is not a cleanup, it's part of
the fix, since those identifiers are bogus (for example, __ppc64__
isn't defined anywhere else in the kernel, which means we'd fall into
the 32-bit definitions on ppc64).
Tested on ppc64 with no regression on x86_64.
[1] http://marc.info/?l=linux-kernel&m=
145994470805853&w=4
Suggested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ahmed Samy [Sun, 17 Apr 2016 05:37:09 +0000 (05:37 +0000)]
dm cache metadata: fix cmd_read_lock() acquiring write lock
commit
6545b60baaf880b0cd29a5e89dbe745a06027e89 upstream.
Commit
9567366fefdd ("dm cache metadata: fix READ_LOCK macros and
cleanup WRITE_LOCK macros") uses down_write() instead of down_read() in
cmd_read_lock(), yet up_read() is used to release the lock in
READ_UNLOCK(). Fix it.
Fixes:
9567366fefdd ("dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros")
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mike Snitzer [Tue, 12 Apr 2016 16:14:46 +0000 (12:14 -0400)]
dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros
commit
9567366fefddeaea4ed1d713270535d93a3b3c76 upstream.
The READ_LOCK macro was incorrectly returning -EINVAL if
dm_bm_is_read_only() was true -- it will always be true once the cache
metadata transitions to read-only by dm_cache_metadata_set_read_only().
Wrap READ_LOCK and WRITE_LOCK multi-statement macros in do {} while(0).
Also, all accesses of the 'cmd' argument passed to these related macros
are now encapsulated in parenthesis.
A follow-up patch can be developed to eliminate the use of macros in
favor of pure C code. Avoiding that now given that this needs to apply
to stable@.
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Fixes:
d14fcf3dd79 ("dm cache: make sure every metadata function checks fail_io")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lars-Peter Clausen [Thu, 14 Apr 2016 15:01:17 +0000 (17:01 +0200)]
usb: gadget: f_fs: Fix use-after-free
commit
38740a5b87d53ceb89eb2c970150f6e94e00373a upstream.
When using asynchronous read or write operations on the USB endpoints the
issuer of the IO request is notified by calling the ki_complete() callback
of the submitted kiocb when the URB has been completed.
Calling this ki_complete() callback will free kiocb. Make sure that the
structure is no longer accessed beyond that point, otherwise undefined
behaviour might occur.
Fixes:
2e4c7553cd6f ("usb: gadget: f_fs: add aio support")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Robert Dobrowolski [Thu, 24 Mar 2016 10:30:07 +0000 (03:30 -0700)]
usb: hcd: out of bounds access in for_each_companion
commit
e86103a75705c7c530768f4ffaba74cf382910f2 upstream.
On BXT platform Host Controller and Device Controller figure as
same PCI device but with different device function. HCD should
not pass data to Device Controller but only to Host Controllers.
Checking if companion device is Host Controller, otherwise skip.
Signed-off-by: Robert Dobrowolski <robert.dobrowolski@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mathias Nyman [Fri, 8 Apr 2016 13:25:10 +0000 (16:25 +0300)]
xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers
commit
98d74f9ceaefc2b6c4a6440050163a83be0abede upstream.
PCI hotpluggable xhci controllers such as some Alpine Ridge solutions will
remove the xhci controller from the PCI bus when the last USB device is
disconnected.
Add a flag to indicate that the host is being removed to avoid queueing
configure_endpoint commands for the dropped endpoints.
For PCI hotplugged controllers this will prevent 5 second command timeouts
For static xhci controllers the configure_endpoint command is not needed
in the removal case as everything will be returned, freed, and the
controller is reset.
For now the flag is only set for PCI connected host controllers.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lu Baolu [Fri, 8 Apr 2016 13:25:09 +0000 (16:25 +0300)]
usb: xhci: fix wild pointers in xhci_mem_cleanup
commit
71504062a7c34838c3fccd92c447f399d3cb5797 upstream.
This patch fixes some wild pointers produced by xhci_mem_cleanup.
These wild pointers will cause system crash if xhci_mem_cleanup()
is called twice.
Reported-and-tested-by: Pengcheng Li <lpc.li@hisilicon.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mathias Nyman [Fri, 8 Apr 2016 13:25:06 +0000 (16:25 +0300)]
xhci: resume USB 3 roothub first
commit
671ffdff5b13314b1fc65d62cf7604b873fb5dc4 upstream.
Give USB3 devices a better chance to enumerate at USB 3 speeds if
they are connected to a suspended host.
Solves an issue with NEC uPD720200 host hanging when partially
enumerating a USB3 device as USB2 after host controller runtime resume.
Tested-by: Mike Murdoch <main.haarp@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafal Redzimski [Fri, 8 Apr 2016 13:25:05 +0000 (16:25 +0300)]
usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host
commit
0d46faca6f887a849efb07c1655b5a9f7c288b45 upstream.
Broxton B0 also requires XHCI_PME_STUCK_QUIRK.
Adding PCI device ID for Broxton B and adding to quirk.
Signed-off-by: Rafal Redzimski <rafal.f.redzimski@intel.com>
Signed-off-by: Robert Dobrowolski <robert.dobrowolski@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jerome Marchand [Wed, 6 Apr 2016 13:06:48 +0000 (14:06 +0100)]
assoc_array: don't call compare_object() on a node
commit
8d4a2ec1e0b41b0cf9a0c5cd4511da7f8e4f3de2 upstream.
Changes since V1: fixed the description and added KASan warning.
In assoc_array_insert_into_terminal_node(), we call the
compare_object() method on all non-empty slots, even when they're
not leaves, passing a pointer to an unexpected structure to
compare_object(). Currently it causes an out-of-bound read access
in keyring_compare_object detected by KASan (see below). The issue
is easily reproduced with keyutils testsuite.
Only call compare_object() when the slot is a leave.
KASan warning:
==================================================================
BUG: KASAN: slab-out-of-bounds in keyring_compare_object+0x213/0x240 at addr
ffff880060a6f838
Read of size 8 by task keyctl/1655
=============================================================================
BUG kmalloc-192 (Not tainted): kasan: bad access detected
-----------------------------------------------------------------------------
Disabling lock debugging due to kernel taint
INFO: Allocated in assoc_array_insert+0xfd0/0x3a60 age=69 cpu=1 pid=1647
___slab_alloc+0x563/0x5c0
__slab_alloc+0x51/0x90
kmem_cache_alloc_trace+0x263/0x300
assoc_array_insert+0xfd0/0x3a60
__key_link_begin+0xfc/0x270
key_create_or_update+0x459/0xaf0
SyS_add_key+0x1ba/0x350
entry_SYSCALL_64_fastpath+0x12/0x76
INFO: Slab 0xffffea0001829b80 objects=16 used=8 fp=0xffff880060a6f550 flags=0x3fff8000004080
INFO: Object 0xffff880060a6f740 @offset=5952 fp=0xffff880060a6e5d1
Bytes b4
ffff880060a6f730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f740: d1 e5 a6 60 00 88 ff ff 0e 00 00 00 00 00 00 00 ...`............
Object
ffff880060a6f750: 02 cf 8e 60 00 88 ff ff 02 c0 8e 60 00 88 ff ff ...`.......`....
Object
ffff880060a6f760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f7a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f7b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f7c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f7d0: 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f7e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
Object
ffff880060a6f7f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
CPU: 0 PID: 1655 Comm: keyctl Tainted: G B 4.5.0-rc4-kasan+ #291
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
0000000000000000 000000001b2800b4 ffff880060a179e0 ffffffff81b60491
ffff88006c802900 ffff880060a6f740 ffff880060a17a10 ffffffff815e2969
ffff88006c802900 ffffea0001829b80 ffff880060a6f740 ffff880060a6e650
Call Trace:
[<
ffffffff81b60491>] dump_stack+0x85/0xc4
[<
ffffffff815e2969>] print_trailer+0xf9/0x150
[<
ffffffff815e9454>] object_err+0x34/0x40
[<
ffffffff815ebe50>] kasan_report_error+0x230/0x550
[<
ffffffff819949be>] ? keyring_get_key_chunk+0x13e/0x210
[<
ffffffff815ec62d>] __asan_report_load_n_noabort+0x5d/0x70
[<
ffffffff81994cc3>] ? keyring_compare_object+0x213/0x240
[<
ffffffff81994cc3>] keyring_compare_object+0x213/0x240
[<
ffffffff81bc238c>] assoc_array_insert+0x86c/0x3a60
[<
ffffffff81bc1b20>] ? assoc_array_cancel_edit+0x70/0x70
[<
ffffffff8199797d>] ? __key_link_begin+0x20d/0x270
[<
ffffffff8199786c>] __key_link_begin+0xfc/0x270
[<
ffffffff81993389>] key_create_or_update+0x459/0xaf0
[<
ffffffff8128ce0d>] ? trace_hardirqs_on+0xd/0x10
[<
ffffffff81992f30>] ? key_type_lookup+0xc0/0xc0
[<
ffffffff8199e19d>] ? lookup_user_key+0x13d/0xcd0
[<
ffffffff81534763>] ? memdup_user+0x53/0x80
[<
ffffffff819983ea>] SyS_add_key+0x1ba/0x350
[<
ffffffff81998230>] ? key_get_type_from_user.constprop.6+0xa0/0xa0
[<
ffffffff828bcf4e>] ? retint_user+0x18/0x23
[<
ffffffff8128cc7e>] ? trace_hardirqs_on_caller+0x3fe/0x580
[<
ffffffff81004017>] ? trace_hardirqs_on_thunk+0x17/0x19
[<
ffffffff828bc432>] entry_SYSCALL_64_fastpath+0x12/0x76
Memory state around the buggy address:
ffff880060a6f700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
ffff880060a6f780: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
>
ffff880060a6f800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff880060a6f880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff880060a6f900: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00
==================================================================
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lokesh Vutla [Sun, 27 Mar 2016 05:08:55 +0000 (23:08 -0600)]
ARM: OMAP2+: hwmod: Fix updating of sysconfig register
commit
3ca4a238106dedc285193ee47f494a6584b6fd2f upstream.
Commit
127500ccb766f ("ARM: OMAP2+: Only write the sysconfig on idle
when necessary") talks about verification of sysconfig cache value before
updating it, only during idle path. But the patch is adding the
verification in the enable path. So, adding the check in a proper place
as per the commit description.
Not keeping this check during enable path as there is a chance of losing
context and it is safe to do on idle as the context of the register will
never be lost while the device is active.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Cc: Jon Hunter <jonathanh@nvidia.com>
Fixes: commit
127500ccb766 "ARM: OMAP2+: Only write the sysconfig on idle when necessary"
[paul@pwsan.com: appears to have been caused by my own mismerge of the
originally posted patch]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nishanth Menon [Fri, 11 Mar 2016 16:12:28 +0000 (10:12 -0600)]
ARM: OMAP2: Fix up interconnect barrier initialization for DRA7
commit
456e8d53482537616899a146b706eccd095404e6 upstream.
The following commits:
commit
3fa609755c11 ("ARM: omap2: restore OMAP4 barrier behaviour")
commit
f746929ffdc8 ("Revert "ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688"")
and
commit
ea827ad5ffbb ("ARM: DRA7: Provide proper IO map table")
came in around the same time, unfortunately this seem to have missed
initializing the barrier for DRA7 platforms - omap5_map_io was reused
for dra7 till it was split out by the last patch. barrier_init
needs to be hence carried forward as it is valid for DRA7 family of
processors as they are for OMAP5.
Fixes:
ea827ad5ffbb7 ("ARM: DRA7: Provide proper IO map table")
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Patrick Uiterwijk [Tue, 29 Mar 2016 16:57:40 +0000 (16:57 +0000)]
ARM: mvebu: Correct unit address for linksys
commit
199831c77c50e6913e893b6bc268ba9f4a9a2bf8 upstream.
The USB2 port for Armada 38x is defined to be at 58000, not at
50000.
Fixes:
2d0a7addbd10 ("ARM: Kirkwood: Add support for many Synology NAS devices")
Signed-off-by: Patrick Uiterwijk <patrick@puiterwijk.org>
Acked-by: Imre Kaloz <kaloz@openwrt.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Lokesh Vutla [Tue, 8 Mar 2016 06:54:35 +0000 (12:24 +0530)]
ARM: dts: AM43x-epos: Fix clk parent for synctimer
commit
cfe1580a6415bc37fd62d79eb8102a618f7650b2 upstream.
commit
55ee7017ee31 ("arm: omap2: board-generic: use omap4_local_timer_init
for AM437x") makes synctimer32k as the clocksource on AM43xx. By default
the synctimer32k is clocked by 32K RTC OSC on AM43xx. But this 32K RTC OSC
is not available on epos boards which makes it fail to boot.
Synctimer32k can also be clocked by a peripheral PLL, so making this as
clock parent for synctimer3k on epos boards.
Fixes:
55ee7017ee31 ("arm: omap2: board-generic: use omap4_local_timer_init for AM437x")
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Marc Zyngier [Wed, 6 Apr 2016 08:37:22 +0000 (09:37 +0100)]
KVM: arm/arm64: Handle forward time correction gracefully
commit
1c5631c73fc2261a5df64a72c155cb53dcdc0c45 upstream.
On a host that runs NTP, corrections can have a direct impact on
the background timer that we program on the behalf of a vcpu.
In particular, NTP performing a forward correction will result in
a timer expiring sooner than expected from a guest point of view.
Not a big deal, we kick the vcpu anyway.
But on wake-up, the vcpu thread is going to perform a check to
find out whether or not it should block. And at that point, the
timer check is going to say "timer has not expired yet, go back
to sleep". This results in the timer event being lost forever.
There are multiple ways to handle this. One would be record that
the timer has expired and let kvm_cpu_has_pending_timer return
true in that case, but that would be fairly invasive. Another is
to check for the "short sleep" condition in the hrtimer callback,
and restart the timer for the remaining time when the condition
is detected.
This patch implements the latter, with a bit of refactoring in
order to avoid too much code duplication.
Reported-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Matlack [Wed, 30 Mar 2016 19:24:47 +0000 (12:24 -0700)]
kvm: x86: do not leak guest xcr0 into host interrupt handlers
commit
fc5b7f3bf1e1414bd4e91db6918c85ace0c873a5 upstream.
An interrupt handler that uses the fpu can kill a KVM VM, if it runs
under the following conditions:
- the guest's xcr0 register is loaded on the cpu
- the guest's fpu context is not loaded
- the host is using eagerfpu
Note that the guest's xcr0 register and fpu context are not loaded as
part of the atomic world switch into "guest mode". They are loaded by
KVM while the cpu is still in "host mode".
Usage of the fpu in interrupt context is gated by irq_fpu_usable(). The
interrupt handler will look something like this:
if (irq_fpu_usable()) {
kernel_fpu_begin();
[... code that uses the fpu ...]
kernel_fpu_end();
}
As long as the guest's fpu is not loaded and the host is using eager
fpu, irq_fpu_usable() returns true (interrupted_kernel_fpu_idle()
returns true). The interrupt handler proceeds to use the fpu with
the guest's xcr0 live.
kernel_fpu_begin() saves the current fpu context. If this uses
XSAVE[OPT], it may leave the xsave area in an undesirable state.
According to the SDM, during XSAVE bit i of XSTATE_BV is not modified
if bit i is 0 in xcr0. So it's possible that XSTATE_BV[i] == 1 and
xcr0[i] == 0 following an XSAVE.
kernel_fpu_end() restores the fpu context. Now if any bit i in
XSTATE_BV == 1 while xcr0[i] == 0, XRSTOR generates a #GP. The
fault is trapped and SIGSEGV is delivered to the current process.
Only pre-4.2 kernels appear to be vulnerable to this sequence of
events. Commit
653f52c ("kvm,x86: load guest FPU context more eagerly")
from 4.2 forces the guest's fpu to always be loaded on eagerfpu hosts.
This patch fixes the bug by keeping the host's xcr0 loaded outside
of the interrupts-disabled region where KVM switches into guest mode.
Suggested-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: David Matlack <dmatlack@google.com>
[Move load after goto cancel_injection. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tony Luck [Wed, 6 Apr 2016 08:05:16 +0000 (10:05 +0200)]
x86/mce: Avoid using object after free in genpool
commit
a3125494cff084b098c80bb36fbe2061ffed9d52 upstream.
When we loop over all queued machine check error records to pass them
to the registered notifiers we use llist_for_each_entry(). But the loop
calls gen_pool_free() for the entry in the body of the loop - and then
the iterator looks at node->next after the free.
Use llist_for_each_entry_safe() instead.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Gong Chen <gong.chen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/0205920@agluck-desk.sc.intel.com
Link: http://lkml.kernel.org/r/1459929916-12852-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ming Lei [Fri, 15 Apr 2016 10:51:28 +0000 (18:51 +0800)]
block: loop: fix filesystem corruption in case of aio/dio
commit
a7297a6a3a3322b054592e8e988981d2f5f29cc4 upstream.
Starting from commit
e36f620428(block: split bios to max possible length),
block core starts to split bio in the middle of bvec.
Unfortunately loop dio/aio doesn't consider this situation, and
always treat 'iter.iov_offset' as zero. Then filesystem corruption
is observed.
This patch figures out the offset of the base bvevc via
'bio->bi_iter.bi_bvec_done' and fixes the issue by passing the offset
to iov iterator.
Fixes:
e36f6204288088f (block: split bios to max possible length)
Cc: Keith Busch <keith.busch@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ming Lei [Wed, 30 Mar 2016 00:46:31 +0000 (08:46 +0800)]
block: partition: initialize percpuref before sending out KOBJ_ADD
commit
b30a337ca27c4f40439e4bfb290cba5f88d73bb7 upstream.
The initialization of partition's percpu_ref should have been done before
sending out KOBJ_ADD uevent, which may cause userspace to read partition
table. So the uninitialized percpu_ref may be accessed in data path.
This patch fixes this issue reported by Naveen.
Reported-by: Naveen Kaje <nkaje@codeaurora.org>
Tested-by: Naveen Kaje <nkaje@codeaurora.org>
Fixes:
6c71013ecb7e2(block: partition: convert percpu ref)
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Wed, 20 Apr 2016 06:44:02 +0000 (15:44 +0900)]
Linux 4.4.8
Greg Kroah-Hartman [Sat, 20 Feb 2016 22:19:34 +0000 (14:19 -0800)]
Revert "usb: hub: do not clear BOS field during reset device"
commit
e5bdfd50d6f76077bf8441d130c606229e100d40 upstream.
This reverts commit
d8f00cd685f5c8e0def8593e520a7fef12c22407.
Tony writes:
This upstream commit is causing an oops:
d8f00cd685f5 ("usb: hub: do not clear BOS field during reset device")
This patch has already been included in several -stable kernels. Here
are the affected kernels:
4.5.0-rc4 (current git)
4.4.2
4.3.6 (currently in review)
4.1.18
3.18.27
3.14.61
How to reproduce the problem:
Boot kernel with slub debugging enabled (otherwise memory corruption
will cause random oopses later instead of immediately)
Plug in USB 3.0 disk to xhci USB 3.0 port
dd if=/dev/sdc of=/dev/null bs=65536
(where /dev/sdc is the USB 3.0 disk)
Unplug USB cable while dd is still going
Oops is immediate:
Reported-by: Tony Battersby <tonyb@cybernetics.com>
Cc: Du, Changbin <changbin.du@intel.com>
Cc: Roger Quadros <rogerq@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vladis Dronov [Mon, 16 Nov 2015 17:55:11 +0000 (15:55 -0200)]
usbvision: fix crash on detecting device with invalid configuration
commit
fa52bd506f274b7619955917abfde355e3d19ffe upstream.
The usbvision driver crashes when a specially crafted usb device with invalid
number of interfaces or endpoints is detected. This fix adds checks that the
device has proper configuration expected by the driver.
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Liviu Dudau [Thu, 21 Jan 2016 11:57:47 +0000 (11:57 +0000)]
staging: android: ion: Set the length of the DMA sg entries in buffer
commit
70bc916b2c80913753fb188d4daee50a64d21ba0 upstream.
ion_buffer_create() will allocate a buffer and then create a DMA
mapping for it, but it forgot to set the length of the page entries.
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjorn Helgaas [Wed, 17 Feb 2016 18:26:42 +0000 (12:26 -0600)]
Revert "PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()"
commit
6c777e8799a93e3bdb67bec622429e1b48dc90fb upstream.
991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and
pcibios_free_irq()") appeared in v4.3 and helps support IOAPIC hotplug.
Олег reported that the Elcus-1553 TA1-PCI driver worked in v4.2 but not
v4.3 and bisected it to
991de2e59090. Sunjin reported that the RocketRAID
272x driver worked in v4.2 but not v4.3. In both cases booting with
"pci=routirq" is a workaround.
I think the problem is that after
991de2e59090, we no longer call
pcibios_enable_irq() for upstream bridges. Prior to
991de2e59090, when a
driver called pci_enable_device(), we recursively called
pcibios_enable_irq() for upstream bridges via pci_enable_bridge().
After
991de2e59090, we call pcibios_enable_irq() from pci_device_probe()
instead of the pci_enable_device() path, which does *not* call
pcibios_enable_irq() for upstream bridges.
Revert
991de2e59090 to fix these driver regressions.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes:
991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Reported-and-tested-by: Олег Мороз <oleg.moroz@mcc.vniiem.ru>
Reported-by: Sunjin Yang <fan4326@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjorn Helgaas [Wed, 17 Feb 2016 18:26:38 +0000 (12:26 -0600)]
Revert "PCI: Add helpers to manage pci_dev->irq and pci_dev->irq_managed"
commit
67b4eab91caf2ad574cab1b17ae09180ea2e116e upstream.
Revert
811a4e6fce09 ("PCI: Add helpers to manage pci_dev->irq and
pci_dev->irq_managed").
This is part of reverting
991de2e59090 ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes:
991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjorn Helgaas [Wed, 17 Feb 2016 18:26:33 +0000 (12:26 -0600)]
Revert "x86/PCI: Don't alloc pcibios-irq when MSI is enabled"
commit
fe25d078874f2c29c38f4160467d74f5756537c9 upstream.
Revert
8affb487d4a4 ("x86/PCI: Don't alloc pcibios-irq when MSI is
enabled").
This is part of reverting
991de2e59090 ("PCI, x86: Implement
pcibios_alloc_irq() and pcibios_free_irq()") to fix regressions it
introduced.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=111211
Fixes:
991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
CC: Jiang Liu <jiang.liu@linux.intel.com>
CC: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alan Stern [Wed, 23 Mar 2016 16:17:09 +0000 (12:17 -0400)]
HID: usbhid: fix inconsistent reset/resume/reset-resume behavior
commit
972e6a993f278b416a8ee3ec65475724fc36feb2 upstream.
The usbhid driver has inconsistently duplicated code in its post-reset,
resume, and reset-resume pathways.
reset-resume doesn't check HID_STARTED before trying to
restart the I/O queues.
resume fails to clear the HID_SUSPENDED flag if HID_STARTED
isn't set.
resume calls usbhid_restart_queues() with usbhid->lock held
and the others call it without holding the lock.
The first item in particular causes a problem following a reset-resume
if the driver hasn't started up its I/O. URB submission fails because
usbhid->urbin is NULL, and this triggers an unending reset-retry loop.
This patch fixes the problem by creating a new subroutine,
hid_restart_io(), to carry out all the common activities. It also
adds some checks that were missing in the original code:
After a reset, there's no need to clear any halted endpoints.
After a resume, if a reset is pending there's no need to
restart any I/O until the reset is finished.
After a resume, if the interrupt-IN endpoint is halted there's
no need to submit the input URB until the halt has been
cleared.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Daniel Fraga <fragabr@gmail.com>
Tested-by: Daniel Fraga <fragabr@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Benjamin Tissoires [Fri, 25 Mar 2016 14:26:55 +0000 (15:26 +0100)]
HID: wacom: fix Bamboo ONE oops
commit
580549ef6b3e3fb3b958de490ca99f43a089a2cf upstream.
Looks like recent changes in the Wacom driver made the Bamboo ONE crashes.
The tablet behaves as if it was a regular Bamboo device with pen, touch
and pad, but there is no physical pad connected to it.
The weird part is that the pad is still sending events and given that
there is no input node connected to it, we get anull pointer exception.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1317116
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kailang Yang [Tue, 12 Apr 2016 02:55:03 +0000 (10:55 +0800)]
ALSA: usb-audio: Skip volume controls triggers hangup on Dell USB Dock
commit
adcdd0d5a1cb779f6d455ae70882c19c527627a8 upstream.
This is Dell usb dock audio workaround.
It was fixed the master volume keep lower.
[Some background: the patch essentially skips the controls of a couple
of FU volumes. Although the firmware exposes the dB and the value
information via the usb descriptor, changing the values (we set the
min volume as default) screws up the device. Although this has been
fixed in the newer firmware, the devices are shipped with the old
firmware, thus we need the workaround in the driver side. -- tiwai]
Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dennis Kadioglu [Wed, 6 Apr 2016 06:39:01 +0000 (08:39 +0200)]
ALSA: usb-audio: Add a quirk for Plantronics BT300
commit
b4203ff5464da00b7812e7b480192745b0d66bbf upstream.
Plantronics BT300 does not support reading the sample rate which leads
to many lines of "cannot get freq at ep 0x1". This patch adds the USB
ID of the BT300 to quirks.c and avoids those error messages.
Signed-off-by: Dennis Kadioglu <denk@post.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Takashi Iwai [Mon, 4 Apr 2016 09:47:50 +0000 (11:47 +0200)]
ALSA: usb-audio: Add a sample rate quirk for Phoenix Audio TMX320
commit
f03b24a851d32ca85dacab01785b24a7ee717d37 upstream.
Phoenix Audio TMX320 gives the similar error when the sample rate is
asked:
usb 2-1.3: 2:1: cannot get freq at ep 0x85
usb 2-1.3: 1:1: cannot get freq at ep 0x2
....
Add the corresponding USB-device ID (1de7:0014) to
snd_usb_get_sample_rate_quirk() list.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=110221
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sven Eckelmann [Mon, 11 Apr 2016 14:55:26 +0000 (16:55 +0200)]
ALSA: hda/realtek - Enable the ALC292 dock fixup on the Thinkpad T460s
commit
c636b95ec5980345674ad7960a3c67135a84b687 upstream.
The Lenovo Thinkpad T460s requires the alc_fixup_tpt440_dock as well in
order to get working sound output on the docking stations headphone jack.
Patch tested on a Thinkpad T460s (20F9CT01WW) using a ThinkPad Ultradock
on kernel 4.4.6.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Tested-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hui Wang [Fri, 1 Apr 2016 03:00:15 +0000 (11:00 +0800)]
ALSA: hda - fix front mic problem for a HP desktop
commit
e549d190f7b5f94e9ab36bd965028112914d010d upstream.
The front mic jack (pink color) can't detect any plug or unplug. After
applying this fix, both detecting function and recording function
work well.
BugLink: https://bugs.launchpad.net/bugs/1564712
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>
Takashi Iwai [Thu, 25 Feb 2016 13:31:59 +0000 (14:31 +0100)]
ALSA: hda - Fix headset support and noise on HP EliteBook 755 G2
commit
f883982dc1b117f04579f0896821cd9f2e397f94 upstream.
HP EliteBook 755 G2 with ALC3228 (ALC280) codec [103c:221c] requires
the known fixup (ALC269_FIXUP_HEADSET_MIC) for making the headset mic
working. Also, it suffers from the loopback noise problem, so we
should disable aamix path as well.
Reported-by: Derick Eddington <derick.eddington@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Henningsson [Thu, 25 Feb 2016 08:37:05 +0000 (09:37 +0100)]
ALSA: hda - Fixup speaker pass-through control for nid 0x14 on ALC225
commit
2ae955774f29bbd7d16149cb0ae8d0319bf2ecc4 upstream.
On one of the machines we enable, we found that the actual speaker volume
did not always correspond to the volume set in alsamixer. This patch
fixes that problem.
This patch was orginally written by Kailang @ Realtek, I've rebased it
to fit sound git master.
BugLink: https://bugs.launchpad.net/bugs/1549660
Co-Authored-By: Kailang <kailang@realtek.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Adrian Hunter [Mon, 4 Apr 2016 09:40:37 +0000 (12:40 +0300)]
mmc: sdhci-pci: Add support and PCI IDs for more Broxton host controllers
commit
01d6b2a40a0fa73c90e05b1033f181a51fec9292 upstream.
Add support and PCI IDs for more Broxton host controllers
Other BXT IDs were added in v4.4 so cc'ing stable. This patch
is dependent on commit
163cbe31e516 ("mmc: sdhci-pci: Fix card
detect race for Intel BXT/APL") but that is already in stable
since v4.4.4.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Zijlstra [Wed, 24 Feb 2016 17:45:46 +0000 (18:45 +0100)]
perf: Cure event->pending_disable race
commit
28a967c3a2f99fa3b5f762f25cb2a319d933571b upstream.
Because event_sched_out() checks event->pending_disable _before_
actually disabling the event, it can happen that the event fires after
it checks but before it gets disabled.
This would leave event->pending_disable set and the queued irq_work
will try and process it.
However, if the event trigger was during schedule(), the event might
have been de-scheduled by the time the irq_work runs, and
perf_event_disable_local() will fail.
Fix this by checking event->pending_disable _after_ we call
event->pmu->del(). This depends on the latter being a compiler
barrier, such that the compiler does not lift the load and re-creates
the problem.
Tested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dvyukov@google.com
Cc: eranian@google.com
Cc: oleg@redhat.com
Cc: panand@redhat.com
Cc: sasha.levin@oracle.com
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160224174948.040469884@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Peter Zijlstra [Wed, 24 Feb 2016 17:45:41 +0000 (18:45 +0100)]
perf: Do not double free
commit
130056275ade730e7a79c110212c8815202773ee upstream.
In case of: err_file: fput(event_file), we'll end up calling
perf_release() which in turn will free the event.
Do not then free the event _again_.
Tested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dvyukov@google.com
Cc: eranian@google.com
Cc: oleg@redhat.com
Cc: panand@redhat.com
Cc: sasha.levin@oracle.com
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160224174947.697350349@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yang Shi [Mon, 8 Feb 2016 22:49:24 +0000 (14:49 -0800)]
arm64: replace read_lock to rcu lock in call_step_hook
commit
cf0a25436f05753aca5151891aea4fd130556e2a upstream.
BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
in_atomic(): 1, irqs_disabled(): 128, pid: 383, name: sh
Preemption disabled at:[<
ffff800000124c18>] kgdb_cpu_enter+0x158/0x6b8
CPU: 3 PID: 383 Comm: sh Tainted: G W 4.1.13-rt13 #2
Hardware name: Freescale Layerscape 2085a RDB Board (DT)
Call trace:
[<
ffff8000000885e8>] dump_backtrace+0x0/0x128
[<
ffff800000088734>] show_stack+0x24/0x30
[<
ffff80000079a7c4>] dump_stack+0x80/0xa0
[<
ffff8000000bd324>] ___might_sleep+0x18c/0x1a0
[<
ffff8000007a20ac>] __rt_spin_lock+0x2c/0x40
[<
ffff8000007a2268>] rt_read_lock+0x40/0x58
[<
ffff800000085328>] single_step_handler+0x38/0xd8
[<
ffff800000082368>] do_debug_exception+0x58/0xb8
Exception stack(0xffff80834a1e7c80 to 0xffff80834a1e7da0)
7c80:
ffffff9c ffffffff 92c23ba0 0000ffff 4a1e7e40 ffff8083 001bfcc4 ffff8000
7ca0:
f2000400 00000000 00000000 00000000 4a1e7d80 ffff8083 0049501c ffff8000
7cc0:
00005402 00000000 00aaa210 ffff8000 4a1e7ea0 ffff8083 000833f4 ffff8000
7ce0:
ffffff9c ffffffff 92c23ba0 0000ffff 4a1e7ea0 ffff8083 001bfcc0 ffff8000
7d00:
4a0fc400 ffff8083 00005402 00000000 4a1e7d40 ffff8083 00490324 ffff8000
7d20:
ffffff9c 00000000 92c23ba0 0000ffff 000a0000 00000000 00000000 00000000
7d40:
00000008 00000000 00080000 00000000 92c23b8b 0000ffff 92c23b8e 0000ffff
7d60:
00000038 00000000 00001cb2 00000000 00000005 00000000 92d7b498 0000ffff
7d80:
01010101 01010101 92be9000 0000ffff 00000000 00000000 00000030 00000000
[<
ffff8000000833f4>] el1_dbg+0x18/0x6c
This issue is similar with
62c6c61("arm64: replace read_lock to rcu lock in
call_break_hook"), but comes to single_step_handler.
This also solves kgdbts boot test silent hang issue on 4.4 -rt kernel.
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Filipe Manana [Wed, 30 Mar 2016 22:37:21 +0000 (23:37 +0100)]
Btrfs: fix file/data loss caused by fsync after rename and new inode
commit
56f23fdbb600e6087db7b009775b95ce07cc3195 upstream.
If we rename an inode A (be it a file or a directory), create a new
inode B with the old name of inode A and under the same parent directory,
fsync inode B and then power fail, at log tree replay time we end up
removing inode A completely. If inode A is a directory then all its files
are gone too.
Example scenarios where this happens:
This is reproducible with the following steps, taken from a couple of
test cases written for fstests which are going to be submitted upstream
soon:
# Scenario 1
mkfs.btrfs -f /dev/sdc
mount /dev/sdc /mnt
mkdir -p /mnt/a/x
echo "hello" > /mnt/a/x/foo
echo "world" > /mnt/a/x/bar
sync
mv /mnt/a/x /mnt/a/y
mkdir /mnt/a/x
xfs_io -c fsync /mnt/a/x
<power failure happens>
The next time the fs is mounted, log tree replay happens and
the directory "y" does not exist nor do the files "foo" and
"bar" exist anywhere (neither in "y" nor in "x", nor the root
nor anywhere).
# Scenario 2
mkfs.btrfs -f /dev/sdc
mount /dev/sdc /mnt
mkdir /mnt/a
echo "hello" > /mnt/a/foo
sync
mv /mnt/a/foo /mnt/a/bar
echo "world" > /mnt/a/foo
xfs_io -c fsync /mnt/a/foo
<power failure happens>
The next time the fs is mounted, log tree replay happens and the
file "bar" does not exists anymore. A file with the name "foo"
exists and it matches the second file we created.
Another related problem that does not involve file/data loss is when a
new inode is created with the name of a deleted snapshot and we fsync it:
mkfs.btrfs -f /dev/sdc
mount /dev/sdc /mnt
mkdir /mnt/testdir
btrfs subvolume snapshot /mnt /mnt/testdir/snap
btrfs subvolume delete /mnt/testdir/snap
rmdir /mnt/testdir
mkdir /mnt/testdir
xfs_io -c fsync /mnt/testdir # or fsync some file inside /mnt/testdir
<power failure>
The next time the fs is mounted the log replay procedure fails because
it attempts to delete the snapshot entry (which has dir item key type
of BTRFS_ROOT_ITEM_KEY) as if it were a regular (non-root) entry,
resulting in the following error that causes mount to fail:
[52174.510532] BTRFS info (device dm-0): failed to delete reference to snap, inode 257 parent 257
[52174.512570] ------------[ cut here ]------------
[52174.513278] WARNING: CPU: 12 PID: 28024 at fs/btrfs/inode.c:3986 __btrfs_unlink_inode+0x178/0x351 [btrfs]()
[52174.514681] BTRFS: Transaction aborted (error -2)
[52174.515630] Modules linked in: btrfs dm_flakey dm_mod overlay crc32c_generic ppdev xor raid6_pq acpi_cpufreq parport_pc tpm_tis sg parport tpm evdev i2c_piix4 proc
[52174.521568] CPU: 12 PID: 28024 Comm: mount Tainted: G W 4.5.0-rc6-btrfs-next-27+ #1
[52174.522805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS by qemu-project.org 04/01/2014
[52174.524053]
0000000000000000 ffff8801df2a7710 ffffffff81264e93 ffff8801df2a7758
[52174.524053]
0000000000000009 ffff8801df2a7748 ffffffff81051618 ffffffffa03591cd
[52174.524053]
00000000fffffffe ffff88015e6e5000 ffff88016dbc3c88 ffff88016dbc3c88
[52174.524053] Call Trace:
[52174.524053] [<
ffffffff81264e93>] dump_stack+0x67/0x90
[52174.524053] [<
ffffffff81051618>] warn_slowpath_common+0x99/0xb2
[52174.524053] [<
ffffffffa03591cd>] ? __btrfs_unlink_inode+0x178/0x351 [btrfs]
[52174.524053] [<
ffffffff81051679>] warn_slowpath_fmt+0x48/0x50
[52174.524053] [<
ffffffffa03591cd>] __btrfs_unlink_inode+0x178/0x351 [btrfs]
[52174.524053] [<
ffffffff8118f5e9>] ? iput+0xb0/0x284
[52174.524053] [<
ffffffffa0359fe8>] btrfs_unlink_inode+0x1c/0x3d [btrfs]
[52174.524053] [<
ffffffffa038631e>] check_item_in_log+0x1fe/0x29b [btrfs]
[52174.524053] [<
ffffffffa0386522>] replay_dir_deletes+0x167/0x1cf [btrfs]
[52174.524053] [<
ffffffffa038739e>] fixup_inode_link_count+0x289/0x2aa [btrfs]
[52174.524053] [<
ffffffffa038748a>] fixup_inode_link_counts+0xcb/0x105 [btrfs]
[52174.524053] [<
ffffffffa038a5ec>] btrfs_recover_log_trees+0x258/0x32c [btrfs]
[52174.524053] [<
ffffffffa03885b2>] ? replay_one_extent+0x511/0x511 [btrfs]
[52174.524053] [<
ffffffffa034f288>] open_ctree+0x1dd4/0x21b9 [btrfs]
[52174.524053] [<
ffffffffa032b753>] btrfs_mount+0x97e/0xaed [btrfs]
[52174.524053] [<
ffffffff8108e1b7>] ? trace_hardirqs_on+0xd/0xf
[52174.524053] [<
ffffffff8117bafa>] mount_fs+0x67/0x131
[52174.524053] [<
ffffffff81193003>] vfs_kern_mount+0x6c/0xde
[52174.524053] [<
ffffffffa032af81>] btrfs_mount+0x1ac/0xaed [btrfs]
[52174.524053] [<
ffffffff8108e1b7>] ? trace_hardirqs_on+0xd/0xf
[52174.524053] [<
ffffffff8108c262>] ? lockdep_init_map+0xb9/0x1b3
[52174.524053] [<
ffffffff8117bafa>] mount_fs+0x67/0x131
[52174.524053] [<
ffffffff81193003>] vfs_kern_mount+0x6c/0xde
[52174.524053] [<
ffffffff8119590f>] do_mount+0x8a6/0x9e8
[52174.524053] [<
ffffffff811358dd>] ? strndup_user+0x3f/0x59
[52174.524053] [<
ffffffff81195c65>] SyS_mount+0x77/0x9f
[52174.524053] [<
ffffffff814935d7>] entry_SYSCALL_64_fastpath+0x12/0x6b
[52174.561288] ---[ end trace
6b53049efb1a3ea6 ]---
Fix this by forcing a transaction commit when such cases happen.
This means we check in the commit root of the subvolume tree if there
was any other inode with the same reference when the inode we are
fsync'ing is a new inode (created in the current transaction).
Test cases for fstests, covering all the scenarios given above, were
submitted upstream for fstests:
* fstests: generic test for fsync after renaming directory
https://patchwork.kernel.org/patch/
8694281/
* fstests: generic test for fsync after renaming file
https://patchwork.kernel.org/patch/
8694301/
* fstests: add btrfs test for fsync after snapshot deletion
https://patchwork.kernel.org/patch/
8670671/
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>