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avcodec/interplayacm: Fix overflow of last unused value

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Fixes: signed integer overflow: -2147450880 - 65535 cannot be represented in type 'int'
Fixes: 18393/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_INTERPLAY_ACM_fuzzer-5667520110919680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-25 12:44:45 +02:00
parent 7786f6c30e
commit 10eabb8e40
1 changed files with 1 additions and 1 deletions
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libavcodec/interplayacm.c
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@ -529,7 +529,7 @@ static int decode_block(InterplayACMContext *s)
for (i = 1, x = -val; i <= count; i++) {
s->midbuf[-i] = x;
x -= val;
x -= (unsigned)val;
}
ret = fill_block(s);