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ASoC: Jack: Fix NULL pointer dereference in snd_soc_jack_report 

commit 8f157d4ff0 upstream.

Check for existance of jack before tracing.
NULL pointer dereference has been reported by KASAN while unloading
machine driver (snd_soc_cnl_rt274).

Signed-off-by: Pawel Harlozinski <pawel.harlozinski@linux.intel.com>
Link: https://lore.kernel.org/r/20191112130237.10141-1-pawel.harlozinski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Pawel Harlozinski 2019-11-12 14:02:36 +01:00 committed by Greg Kroah-Hartman
parent 560025a0b5
commit 9ae0611f0c
1 changed files with 1 additions and 2 deletions
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3
sound/soc/soc-jack.c
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@ -82,10 +82,9 @@ void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
unsigned int sync = 0;
int enable;
trace_snd_soc_jack_report(jack, mask, status);
if (!jack)
return;
trace_snd_soc_jack_report(jack, mask, status);
dapm = &jack->card->dapm;