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Message-Id: <20221128174324.1443132-5-sashal@kernel.org>
Date: Mon, 28 Nov 2022 12:43:23 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>,
Mark Brown <broonie@...nel.org>,
Sasha Levin <sashal@...nel.org>, lgirdwood@...il.com,
perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 4.9 5/5] ASoC: soc-pcm: Add NULL check in BE reparenting
From: Srinivasa Rao Mandadapu <quic_srivasam@...cinc.com>
[ Upstream commit db8f91d424fe0ea6db337aca8bc05908bbce1498 ]
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@...cinc.com>
Link: https://lore.kernel.org/r/1669098673-29703-1-git-send-email-quic_srivasam@quicinc.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 6c31a909845c..f6cebe2b3cbb 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1182,6 +1182,8 @@ 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;
list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
if (dpcm->fe == fe)
--
2.35.1
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