Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.9 5/5] ASoC: soc-pcm: Add NULL check in BE reparenting | Date | Mon, 28 Nov 2022 12:43:23 -0500 |
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From: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.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@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> --- 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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