Commit d740d42a authored Nov 03, 2024 by Srinivasa Rao Mandadapu Committed by He Yujie Nov 03, 2024

ASoC: soc-pcm: Add NULL check in BE reparenting

stable inclusion
from stable-v5.10.159
commit f6f45e538328df9ce66aa61bafee1a5717c4b700
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7NTXH

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f6f45e538328df9ce66aa61bafee1a5717c4b700



--------------------------------

[ Upstream commit db8f91d4 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: He Yujie <coka.heyujie@huawei.com>

parent 1f6ceb39

sound/soc/soc-pcm.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1159,6 +1159,8 @@ 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)