From: Srinivasa Rao Mandadapu Date: Tue, 22 Nov 2022 06:31:13 +0000 (+0530) Subject: ASoC: soc-pcm: Add NULL check in BE reparenting X-Git-Tag: v6.1~41^2~2^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=db8f91d424fe0ea6db337aca8bc05908bbce1498;p=platform%2Fkernel%2Flinux-starfive.git ASoC: soc-pcm: Add NULL check in BE reparenting 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 --- diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 8ceded2..35a16c3 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1247,6 +1247,8 @@ 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)