From: Pawel Harlozinski pawel.harlozinski@linux.intel.com
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.int... Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- sound/soc/soc-jack.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/sound/soc/soc-jack.c +++ b/sound/soc/soc-jack.c @@ -127,10 +127,9 @@ void snd_soc_jack_report(struct snd_soc_ 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;