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avcodec/motionpixels: Check for vlc error in mp_get_vlc()

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Fixes: 15246/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOTIONPIXELS_fuzzer-5168534407086080
Fixes: runtime error: index -1 out of bounds for type 'HuffCode [16]'

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 930cdef80a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-06-15 21:08:31 +02:00
parent 5449787c47
commit 39f5835d89
1 changed files with 2 additions and 0 deletions
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libavcodec/motionpixels.c
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@ -201,6 +201,8 @@ static int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
int i;
i = (mp->codes_count == 1) ? 0 : get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1);
if (i < 0)
return i;
return mp->codes[i].delta;
}