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avcodec/wmv2dec: Check that the P frame secondary header fit in the input 

Fixes: Timeout (64sec ->2 sec)
Fixes: 14131/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV2_fuzzer-5719879556005888

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 2019-04-13 00:15:27 +02:00
parent 110dce9633
commit bcf9d2a172
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wmv2dec.c
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@ -230,6 +230,9 @@ int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
s->rl_chroma_table_index = s->rl_table_index;
}
if (get_bits_left(&s->gb) < 2)
return AVERROR_INVALIDDATA;
s->dc_table_index = get_bits1(&s->gb);
s->mv_table_index = get_bits1(&s->gb);