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alistair23-linux/sound/hda
Takashi Iwai 7ce7dd0a6f ALSA: hda: Fix potential race in unsol event handler
[ Upstream commit c637fa1512 ]

The unsol event handling code has a loop retrieving the read/write
indices and the arrays without locking while the append to the array
may happen concurrently.  This may lead to some inconsistency.
Although there hasn't been any proof of this bad results, it's still
safer to protect the racy accesses.

This patch adds the spinlock protection around the unsol handling loop
for addressing it.  Here we take bus->reg_lock as the writer side
snd_hdac_bus_queue_event() is also protected by that lock.

Link: https://lore.kernel.org/r/20200516062556.30951-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:18:00 +02:00
..
ext ALSA: hda: do not override bus codec_mask in link_get() 2020-03-12 13:00:10 +01:00
Kconfig Merge branch 'topic/hda-bus-ops-cleanup' into for-next 2019-08-08 22:35:44 +02:00
Makefile ALSA: hda: move parts of NHLT code to new module 2019-07-31 15:45:59 +02:00
array.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
hda_bus_type.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
hdac_bus.c ALSA: hda: Fix potential race in unsol event handler 2020-10-01 13:18:00 +02:00
hdac_component.c Linux 5.1-rc5 2019-04-15 15:51:49 +10:00
hdac_controller.c Revert "ALSA: hda: Flush interrupts on disabling" 2019-10-28 11:47:59 +01:00
hdac_device.c ALSA: hda: fix a runtime pm issue in SOF when integrated GPU is disabled 2020-09-17 13:47:49 +02:00
hdac_i915.c ALSA: hda: Fix 1-minute detection delay when i915 module is not available 2019-07-27 08:31:46 +02:00
hdac_regmap.c ALSA: hda: enable regmap internal locking 2020-10-01 13:17:24 +02:00
hdac_stream.c ALSA: hda: Fix regression by strip mask fix 2019-12-21 11:05:23 +01:00
hdac_sysfs.c ALSA: hda: Simplify snd_hdac_refresh_widgets() 2019-07-05 12:01:06 +02:00
hdmi_chmap.c ALSA: hda: Use scnprintf() for printing texts for sysfs/procfs 2020-02-28 17:22:12 +01:00
intel-nhlt.c ALSA: hda: intel-nhlt: handle NHLT VENDOR_DEFINED DMIC geometry 2019-07-31 15:46:00 +02:00
local.h ALSA: hda: Unexport a few more stuff 2019-08-14 20:00:56 +02:00
trace.c ALSA: hda - Re-add tracepoints to HD-audio core driver 2015-03-23 13:17:58 +01:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00