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avcodec/wavpack: Fix integer overflow in FFABS

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Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 5396/clusterfuzz-testcase-minimized-6558555529281536

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 8e50bd61e4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-01-31 02:50:18 +01:00
parent a97335b1b3
commit 4d4656e8cd
1 changed files with 1 additions and 1 deletions
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libavcodec/wavpack.c
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@ -480,7 +480,7 @@ static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb,
}
if (type == AV_SAMPLE_FMT_S16P) {
if (FFABS(L) + (unsigned)FFABS(R) > (1<<19)) {
if (FFABS((int64_t)L) + FFABS((int64_t)R) > (1<<19)) {
av_log(s->avctx, AV_LOG_ERROR, "sample %d %d too large\n", L, R);
return AVERROR_INVALIDDATA;
}