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avcodec/vp3: Sanity check cropping

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Fixes: Timeout
Fixes: 476179563/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_THEORA_fuzzer-5231013478596608

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-02-22 01:20:29 +01:00
parent 65fd516768
commit 228b846407
1 changed files with 2 additions and 0 deletions
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libavcodec/vp3.c
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@@ -2874,6 +2874,8 @@ static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
if (av_image_check_size(visible_width, visible_height, 0, avctx) < 0 ||
visible_width + offset_x > s->width ||
visible_height + offset_y > s->height ||
visible_width + 512 < s->width ||
visible_height + 512 < s->height ||
visible_width < 18
) {
av_log(avctx, AV_LOG_ERROR,