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Jia-Ju Bai 2127c01b7f ALSA: i2c: ak4xxx-adda: Fix a possible null pointer dereference in build_adc_controls() 
In build_adc_controls(), there is an if statement on line 773 to check
whether ak->adc_info is NULL:
    if (! ak->adc_info ||
        ! ak->adc_info[mixer_ch].switch_name)

When ak->adc_info is NULL, it is used on line 792:
    knew.name = ak->adc_info[mixer_ch].selector_name;

Thus, a possible null-pointer dereference may occur.

To fix this bug, referring to lines 773 and 774, ak->adc_info
and ak->adc_info[mixer_ch].selector_name are checked before being used.

This bug is found by a static analysis tool STCheck written by us.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-07-26 14:25:37 +02:00
..
ac97 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
aoa treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 250 2019-06-19 17:09:08 +02:00
arm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
atmel treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
core ALSA: pcm: Fix refcount_inc() on zero usage 2019-07-19 15:47:00 +02:00
drivers treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
firewire ALSA: firewire-motu: more code refactoring for MOTU data block processing layer 2019-07-22 16:05:13 +02:00
hda ALSA: hda: Flush interrupts on disabling 2019-07-22 09:18:02 +02:00
i2c ALSA: i2c: ak4xxx-adda: Fix a possible null pointer dereference in build_adc_controls() 2019-07-26 14:25:37 +02:00
isa treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 371 2019-06-05 17:37:10 +02:00
mips treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 176 2019-05-30 11:29:19 -07:00
oss docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
parisc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 176 2019-05-30 11:29:19 -07:00
pci ALSA: hda - Show the fatal CORB/RIRB error more clearly 2019-07-26 14:24:55 +02:00
pcmcia treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ppc ALSA: ps3: Remove Unneeded variable: "ret" 2019-07-10 11:53:31 +02:00
sh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 273 2019-06-05 17:30:30 +02:00
soc kernel: fix typos and some coding style in comments 2019-07-16 19:23:21 -07:00
sparc treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
spi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
synth treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
usb ALSA: line6: sizeof (byte) is always 1, use that fact. 2019-07-24 15:03:50 +02:00
x86 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 285 2019-06-05 17:36:37 +02:00
xen ASoC: Updates for v5.3 2019-07-08 14:45:34 +02:00
ac97_bus.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
last.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
Makefile
sound_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00