Fixes: overflow in aspect ratio calculation Fixes: signed integer overflow: 393215 * 14594 cannot be represented in type 'int' Fixes: 15728/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV3IMAGE_fuzzer-5661588893204480
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/vc1.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c index e102b931d8..a7875ddf97 100644 --- a/libavcodec/vc1.c +++ b/libavcodec/vc1.c @@ -451,7 +451,11 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb) h = get_bits(gb, 8) + 1; v->s.avctx->sample_aspect_ratio = (AVRational){w, h}; } else { - av_reduce(&v->s.avctx->sample_aspect_ratio.num, + if (v->s.avctx->width > v->max_coded_width || + v->s.avctx->height > v->max_coded_height) { + avpriv_request_sample(v->s.avctx, "Huge resolution"); + } else + av_reduce(&v->s.avctx->sample_aspect_ratio.num, &v->s.avctx->sample_aspect_ratio.den, v->s.avctx->height * w, v->s.avctx->width * h, -- 2.23.0 _______________________________________________ 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".
