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avcodec/mlpdec: Do not leave a invalid num_primitive_matrices in the context

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Fixes: runtime error: index 8 out of bounds for type 'uint8_t [8]'
Fixes: 1699/clusterfuzz-testcase-minimized-6327177438035968

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 64ea4d102a070b95832ae4a751688f87da7760a2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-20 01:23:01 +02:00
parent 3ecff1b7e5
commit 4117f19f2f
1 changed files with 1 additions and 0 deletions
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libavcodec/mlpdec.c
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@ -742,6 +742,7 @@ static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitCo
av_log(m->avctx, AV_LOG_ERROR,
"Number of primitive matrices cannot be greater than %d.\n",
max_primitive_matrices);
s->num_primitive_matrices = 0;
return AVERROR_INVALIDDATA;
}