diff options
| author |   Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> | 2022-04-12 11:16:28 +0200 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2022-04-12 12:19:05 +0200 |
| commit | 1b6a6fc5280e97559287b61eade2d4b363e836f2 (patch) | |
| tree | 3654c5b0592641ee7e1dc78b9c71be650dc08d95 /include/sound | |
| parent | ALSA: hda/tegra: Enable Jack poll for tegra (diff) | |
| download | linux-dev-1b6a6fc5280e97559287b61eade2d4b363e836f2.tar.xz linux-dev-1b6a6fc5280e97559287b61eade2d4b363e836f2.zip | |
ALSA: jack: Access input_dev under mutex
It is possible when using ASoC that input_dev is unregistered while
calling snd_jack_report, which causes NULL pointer dereference.
In order to prevent this serialize access to input_dev using mutex lock.
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220412091628.3056922-1-amadeuszx.slawinski@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/jack.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/jack.h b/include/sound/jack.h index 1181f536557e..1ed90e2109e9 100644 --- a/include/sound/jack.h +++ b/include/sound/jack.h @@ -62,6 +62,7 @@ struct snd_jack { const char *id; #ifdef CONFIG_SND_JACK_INPUT_DEV struct input_dev *input_dev; + struct mutex input_dev_lock; int registered; int type; char name[100]; |