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avcodec/h263dec: Sanity check against minimal I/P frame size
Fixes: Timeout
Fixes: 49718/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-4874987894341632
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ca4ff9c21c
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
parent
dc6f7e6bf7
commit
c08f64df47
@ -532,6 +532,8 @@ retry:
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avctx->has_b_frames = !s->low_delay;
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avctx->has_b_frames = !s->low_delay;
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if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
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if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
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if (s->pict_type != AV_PICTURE_TYPE_B && s->mb_num/2 > get_bits_left(&s->gb))
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return AVERROR_INVALIDDATA;
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if (ff_mpeg4_workaround_bugs(avctx) == 1)
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if (ff_mpeg4_workaround_bugs(avctx) == 1)
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goto retry;
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goto retry;
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}
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}
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