From: Pawel Harlozinski <pawel.harlozinski@linux.intel.com>
Date: Tue, 12 Nov 2019 14:02:36 +0100
Subject: ASoC: Jack: Fix NULL pointer dereference in snd_soc_jack_report
Git-commit: 8f157d4ff039e03e2ed4cb602eeed2fd4687a58f
Patch-mainline: 5.5-rc1
References: bnc#1151927 5.3.17

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: Jiri Slaby <jslaby@suse.cz>
---
 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;