Tuo Li 1f4a08fed4 ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync() ... The variable codec->regmap is often protected by the lock codec->regmap_lock when is accessed. However, it is accessed without holding the lock when is accessed in snd_hdac_regmap_sync(): if (codec->regmap) In my opinion, this may be a harmful race, because if codec->regmap is set to NULL right after the condition is checked, a null-pointer dereference can occur in the called function regcache_sync(): map->lock(map->lock_arg); --> Line 360 in drivers/base/regmap/regcache.c To fix this possible null-pointer dereference caused by data race, the mutex_lock coverage is extended to protect the if statement as well as the function call to regcache_sync(). [ Note: the lack of the regmap_lock itself is harmless for the current codec driver implementations, as snd_hdac_regmap_sync() is only for PM runtime resume that is prohibited during the codec probe. But the change makes the whole code more consistent, so it's merged as is -- tiwai ] Reported-by: BassCheck <bass@buaa.edu.cn> Signed-off-by: Tuo Li <islituo@gmail.com> Link: https://lore.kernel.org/r/20230703031016.1184711-1-islituo@gmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>		2023-07-03 10:08:12 +02:00
..
ext
array.c
hda_bus_type.c
hdac_bus.c
hdac_component.c
hdac_controller.c	ALSA: hda: Using polling mode for loongson controller by default	2023-06-07 12:37:25 +02:00
hdac_device.c	Merge branch 'for-next' into for-linus	2023-06-26 15:23:23 +02:00
hdac_i915.c
hdac_regmap.c	ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()	2023-07-03 10:08:12 +02:00
hdac_stream.c	ALSA: hda: Workaround for SDnCTL register on loongson	2023-06-07 12:41:21 +02:00
hdac_sysfs.c
hdmi_chmap.c
intel-dsp-config.c	ALSA: hda: intel-dsp-config: add MTL PCI id	2023-03-08 06:37:19 +01:00
intel-nhlt.c
intel-sdw-acpi.c
Kconfig
local.h
Makefile
trace.c
trace.h