This is a note to let you know that I've just added the patch titled
ASoC: soc-pcm: Add NULL check in BE reparenting
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-soc-pcm-add-null-check-in-be-reparenting.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5ba1ac88c85bda68782432cbb83ae9c0135ce695
Author: Srinivasa Rao Mandadapu <quic_srivasam@xxxxxxxxxxx>
Date: Tue Nov 22 12:01:13 2022 +0530
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 <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>
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index e995e96ab903..3a9c875534c1 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1168,6 +1168,8 @@ 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)
