[PATCH AUTOSEL 5.18 42/93] media: mediatek: vcodec: return EINVAL if plane is too small

Sasha Levin
2022-08-11T15:57:25Z

From: Justin Green <greenjustin@chromium.org>

[ Upstream commit f5caaa47f55fa742f1a230e5b4258c139e223c74 ]

Modify vb2ops_vdec_buf_prepare to return EINVAL if the size of the plane
is less than the size of the image. Currently we just log an error and
return 0 anyway, which may cause a buffer overrun bug.

Signed-off-by: Justin Green <greenjustin@chromium.org>
Suggested-by: Andres Calderon Jaramillo <andrescj@chromium.org>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
index c8ee5e2b4f69..e52cf8109989 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
@@ -725,6 +725,7 @@ int vb2ops_vdec_buf_prepare(struct vb2_buffer *vb)
mtk_v4l2_err("data will not fit into plane %d (%lu < %d)",
i, vb2_plane_size(vb, i),
q_data->sizeimage[i]);
+ return -EINVAL;
}
}

--
2.35.1