[PATCH 5.4 018/344] media: meson: add missing allocation failure check on new_buf

Greg Kroah-Hartman
2020-02-21T08:01:51Z

From: Colin Ian King <colin.king@canonical.com>

[ Upstream commit 11e0e167d071a28288a7a0a211d48c571d19b56f ]

Currently if the allocation of new_buf fails then a null pointer
dereference occurs when assiging new_buf->vb. Avoid this by returning
early on a memory allocation failure as there is not much more can
be done at this point.

Addresses-Coverity: ("Dereference null return")

Fixes: 3e7f51bd9607 ("media: meson: add v4l2 m2m video decoder driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/media/meson/vdec/vdec.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/staging/media/meson/vdec/vdec.c b/drivers/staging/media/meson/vdec/vdec.c
index 0a1a04fd5d13d..8dd1396909d7e 100644
--- a/drivers/staging/media/meson/vdec/vdec.c
+++ b/drivers/staging/media/meson/vdec/vdec.c
@@ -133,6 +133,8 @@ vdec_queue_recycle(struct amvdec_session *sess, struct vb2_buffer *vb)
struct amvdec_buffer *new_buf;

new_buf = kmalloc(sizeof(*new_buf), GFP_KERNEL);
+ if (!new_buf)
+ return;
new_buf->vb = vb;

mutex_lock(&sess->bufs_recycle_lock);
--
2.20.1