From: Pawel Harlozinski <pawel.harlozinski@xxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20191112130237.10141-1-pawel.harlozinski@xxxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -100,10 +100,9 @@ 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;
