Fixes: Timeout (28sec -> 3sec)
Fixes: 17559/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H263_fuzzer-5681050776240128
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
if ((ret = av_image_check_size(s->width, s->height, 0, s)) < 0)
return ret;
+ if (!(s->avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
+ if ((s->width * s->height / 256 / 8) > get_bits_left(&s->gb))
+ return AVERROR_INVALIDDATA;
+ }
+
s->mb_width = (s->width + 15) / 16;
s->mb_height = (s->height + 15) / 16;
s->mb_num = s->mb_width * s->mb_height;