From: Srinivasa Rao Mandadapu <quic_srivasam@xxxxxxxxxxx> [ 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@xxxxxxxxxxx> Link: https://lore.kernel.org/r/1669098673-29703-1-git-send-email-quic_srivasam@xxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 c03b653bf6ff..1fabb285b016 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1266,6 +1266,8 @@ 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
