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Code Issues Releases Activity

avcodec/msmpeg4dec: Correct table depth

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Fixes undefined shift
Fixes: 1381/clusterfuzz-testcase-minimized-5513944540119040

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-07 02:46:54 +02:00
parent fb0f29f9aa
commit 1121d92707
1 changed files with 1 additions and 1 deletions
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2
libavcodec/msmpeg4dec.c
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@ -140,7 +140,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s, int16_t block[6][64])
if(s->msmpeg4_version==2)
cbp= get_vlc2(&s->gb, v2_intra_cbpc_vlc.table, V2_INTRA_CBPC_VLC_BITS, 1);
else
cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 1);
cbp= get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
if(cbp<0 || cbp>3){
av_log(s->avctx, AV_LOG_ERROR, "cbpc %d invalid at %d %d\n", cbp, s->mb_x, s->mb_y);
return -1;