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avcodec/j2kenc: Fix out of array access in encode_cblk()

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Fixes: 4427/clusterfuzz-testcase-minimized-5106919271301120

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 0674087004538599797688785f6ac82358abc23b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-30 23:42:04 +01:00
parent a65633aa9d
commit 44dc83f0e0
1 changed files with 2 additions and 1 deletions
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libavcodec/j2kenc.c
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@ -688,7 +688,8 @@ static void encode_cblk(Jpeg2000EncoderContext *s, Jpeg2000T1Context *t1, Jpeg20
cblk->npasses = passno;
cblk->ninclpasses = passno;
cblk->passes[passno-1].rate = ff_mqc_flush_to(&t1->mqc, cblk->passes[passno-1].flushed, &cblk->passes[passno-1].flushed_len);
if (passno)
cblk->passes[passno-1].rate = ff_mqc_flush_to(&t1->mqc, cblk->passes[passno-1].flushed, &cblk->passes[passno-1].flushed_len);
}
/* tier-2 routines: */