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avcodec/scpr: Fix multiple runtime error: index 256 out of bounds for type 'unsigned int [256]'

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Fixes: 1519/clusterfuzz-testcase-minimized-5286680976162816

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 2171dfae8c065878a2e130390eb78cf2947a5b69)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-13 15:39:32 +02:00
parent 00a9eaff97
commit d1dd90ae54
1 changed files with 3 additions and 0 deletions
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3
libavcodec/scpr.c
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@ -261,6 +261,9 @@ static int decode_unit(SCPRContext *s, PixelModel *pixel, unsigned step, unsigne
break;
c++;
}
if (x >= 16 || c >= 256) {
return AVERROR_INVALIDDATA;
}
if ((ret = s->decode(gb, rc, cumfr, cnt_c, totfr)) < 0)
return ret;