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

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[ 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@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>
This commit is contained in:
Srinivasa Rao Mandadapu 2022-11-22 12:01:13 +05:30 committed by Greg Kroah-Hartman
parent 3b2c064a8e
commit f2ba66d873
1 changed files with 2 additions and 0 deletions
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2
sound/soc/soc-pcm.c
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@ -1201,6 +1201,8 @@ static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
return; return;
be_substream = snd_soc_dpcm_get_substream(be, stream); be_substream = snd_soc_dpcm_get_substream(be, stream);
if (!be_substream)
return;
for_each_dpcm_fe(be, stream, dpcm) { for_each_dpcm_fe(be, stream, dpcm) {
if (dpcm->fe == fe) if (dpcm->fe == fe)