From db8f91d424fe0ea6db337aca8bc05908bbce1498 Mon Sep 17 00:00:00 2001
From: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Date: Tue, 22 Nov 2022 12:01:13 +0530
Subject: [PATCH] ASoC: soc-pcm: Add NULL check in BE reparenting
Git-commit: db8f91d424fe0ea6db337aca8bc05908bbce1498
Patch-mainline: v6.1-rc7
References: git-fixes
Add NULL check in dpcm_be_reparent API, to handle
kernel NULL pointer dereference error.
The issue occurred in fuzzing test.
Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Link: https://lore.kernel.org/r/1669098673-29703-1-git-send-email-quic_srivasam@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
sound/soc/soc-pcm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 8ceded22a3c4..35a16c3f9591 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1247,6 +1247,8 @@ static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
return;
be_substream = snd_soc_dpcm_get_substream(be, stream);
+ if (!be_substream)
+ return;
for_each_dpcm_fe(be, stream, dpcm) {
if (dpcm->fe == fe)
--
2.35.3