From 9f74b9aa8d58c18927bb9b65dd5ba70a5fd61615 Mon Sep 17 00:00:00 2001 From: Srinivasa Rao Mandadapu Date: Tue, 22 Nov 2022 12:01:13 +0530 Subject: [PATCH] ASoC: soc-pcm: Add NULL check in BE reparenting [ 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 Link: https://lore.kernel.org/r/1669098673-29703-1-git-send-email-quic_srivasam@quicinc.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- 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 f6dc71e..3b67347 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1166,6 +1166,8 @@ 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) -- 2.7.4