Fixes: subtraction of unsigned offset from 0xf6602770 overflowed to 0xf6638c80 Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_THEORA_fuzzer-495074400600064
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/videodsp_template.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/videodsp_template.c b/libavcodec/videodsp_template.c index 324d70f2cb..d653f4d524 100644 --- a/libavcodec/videodsp_template.c +++ b/libavcodec/videodsp_template.c @@ -64,7 +64,7 @@ void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src, av_assert2(start_x < end_x && block_w); w = end_x - start_x; - src += start_y * src_linesize + start_x * sizeof(pixel); + src += start_y * src_linesize + start_x * (ptrdiff_t)sizeof(pixel); buf += start_x * sizeof(pixel); // top @@ -87,7 +87,7 @@ void FUNC(ff_emulated_edge_mc)(uint8_t *buf, const uint8_t *src, buf += buf_linesize; } - buf -= block_h * buf_linesize + start_x * sizeof(pixel); + buf -= block_h * buf_linesize + start_x * (ptrdiff_t)sizeof(pixel); while (block_h--) { pixel *bufp = (pixel *) buf; -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
