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ASoC: Jack: Fix NULL pointer dereference in snd_soc_jack_report

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commit 8f157d4ff039e03e2ed4cb602eeed2fd4687a58f 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>
This commit is contained in:
Pawel Harlozinski 2019-11-12 14:02:36 +01:00 committed by prashantpaddune
parent 6623633f1f
commit 7edccbf62b
1 changed files with 1 additions and 2 deletions
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3
sound/soc/soc-jack.c
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@ -80,10 +80,9 @@ 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;