linux-kernel - [PATCH AUTOSEL 5.15 37/69] media: mediatek: vcodec: return EINVAL if plane is too small

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Message-Id: <20220811155632.1536867-37-sashal@kernel.org>
Date:   Thu, 11 Aug 2022 11:55:46 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Justin Green <greenjustin@...omium.org>,
        Andres Calderon Jaramillo <andrescj@...omium.org>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sasha Levin <sashal@...nel.org>, matthias.bgg@...il.com,
        acourbot@...omium.org, tzungbi@...gle.com,
        yunfei.dong@...iatek.com, hiroh@...omium.org,
        linux-media@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.15 37/69] media: mediatek: vcodec: return EINVAL if plane is too small

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

diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
index 56d86e59421e..71646ef31663 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec.c
@@ -1120,6 +1120,7 @@ static 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