[FFmpeg-devel] [PATCH 3/4] avcodec/mpegvideo_enc: Dont copy beyond the image
Michael Niedermayer
michael at niedermayer.cc
Sat Dec 30 04:49:04 EET 2023
Fixes: out of array access
Fixes: tickets/10754/poc17ffmpeg
Discovered by Zeng Yunxiang.
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
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 dcbf4c0429c..b369c3c735d 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;
--
2.17.1
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