linux/sound/hda
Mark Pearson 537653a069 ALSA: hda: ignore invalid NHLT table
[ Upstream commit a14a6219996ee6f6e858d83b11affc7907633687 ]

On some Lenovo systems if the microphone is disabled in the BIOS
only the NHLT table header is created, with no data. This means
the endpoints field is not correctly set to zero - leading to an
unintialised variable and hence invalid descriptors are parsed
leading to page faults.

The Lenovo firmware team is addressing this, but adding a check
preventing invalid tables being parsed is worthwhile.

Tested on a Lenovo T14.

Tested-by: Philipp Leskovitz <philipp.leskovitz@secunet.com>
Reported-by: Philipp Leskovitz <philipp.leskovitz@secunet.com>
Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210302141003.7342-1-markpearson@lenovo.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-30 14:35:20 +02:00
..
ext ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link() 2020-11-18 19:20:18 +01:00
Kconfig
Makefile
array.c
hda_bus_type.c
hdac_bus.c ALSA: hda: Fix potential race in unsol event handler 2020-10-01 13:18:00 +02:00
hdac_component.c
hdac_controller.c
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
hdac_regmap.c ALSA: hda: enable regmap internal locking 2020-10-01 13:17:24 +02:00
hdac_stream.c
hdac_sysfs.c
hdmi_chmap.c
intel-nhlt.c ALSA: hda: ignore invalid NHLT table 2021-03-30 14:35:20 +02:00
local.h
trace.c
trace.h