[FFmpeg-cvslog] avcodec/mpegvideo_enc: Dont copy beyond the image
Michael Niedermayer
git at videolan.org
Sat Dec 30 22:56:18 EET 2023
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Dec 30 03:06:39 2023 +0100| [a066b8a809fa6d8b31398d41787822803f8762f2] | committer: Michael Niedermayer
avcodec/mpegvideo_enc: Dont copy beyond the image
Fixes: out of array access
Fixes: tickets/10754/poc17ffmpeg
Discovered by Zeng Yunxiang.
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a066b8a809fa6d8b31398d41787822803f8762f2
---
libavcodec/mpegvideo_enc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index dcbf4c0429..b369c3c735 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -1212,7 +1212,7 @@ static int load_input_picture(MpegEncContext *s, const AVFrame *pic_arg)
dst += INPLACE_OFFSET;
if (src_stride == dst_stride)
- memcpy(dst, src, src_stride * h);
+ memcpy(dst, src, src_stride * h - src_stride + w);
else {
int h2 = h;
uint8_t *dst2 = dst;
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