[PATCH 4.19 194/243] media: vimc: fix start stream when link is disabled

Greg Kroah-Hartman
2019-12-11T15:25:51Z

From: Helen Fornazier <helen.koike@collabora.com>

[ Upstream commit e159b6074c82fe31b79aad672e02fa204dbbc6d8 ]

If link is disabled, media_entity_remote_pad returns NULL, causing a
NULL pointer deference.
Ignore links that are not enabled instead.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/vimc/vimc-common.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/vimc/vimc-common.c b/drivers/media/platform/vimc/vimc-common.c
index 204aa6f554e4d..fa8435ac2b1ae 100644
--- a/drivers/media/platform/vimc/vimc-common.c
+++ b/drivers/media/platform/vimc/vimc-common.c
@@ -241,6 +241,8 @@ int vimc_pipeline_s_stream(struct media_entity *ent, int enable)

/* Start the stream in the subdevice direct connected */
pad = media_entity_remote_pad(&ent->pads[i]);
+ if (!pad)
+ continue;

if (!is_media_entity_v4l2_subdev(pad->entity))
return -EINVAL;
--
2.20.1