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@qu... 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 f6a996f0f9c7..f000a7168afc 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1242,6 +1242,8 @@ 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)