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avcodec/mimic: Fix runtime error: index 96 out of bounds for type 'const int8_t [64]'

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Fixes: 1468/clusterfuzz-testcase-minimized-5235964056174592

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 2017-05-11 15:07:28 +02:00
parent 1795dccde0
commit d9051f8f3e
1 changed files with 1 additions and 1 deletions
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2
libavcodec/mimic.c
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@ -260,7 +260,7 @@ static int vlc_decode_block(MimicContext *ctx, int num_coeffs, int qscale)
/* FFmpeg's IDCT behaves somewhat different from the original code, so
* a factor of 4 was added to the input */
coeff = vlcdec_lookup[num_bits][value];
coeff = ((int8_t*)vlcdec_lookup[num_bits])[value];
if (pos < 3)
coeff *= 16;
else /* TODO Use >> 10 instead of / 1001 */