[FFmpeg-cvslog] avcodec/wavpack: Fix integer overflow in wv_unpack_stereo()
Michael Niedermayer
git at videolan.org
Sun Jun 25 02:14:05 EEST 2017
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Jun 25 00:13:53 2017 +0200| [73ea2a028e12a7d779834f78dc496c8c4b08361f] | committer: Michael Niedermayer
avcodec/wavpack: Fix integer overflow in wv_unpack_stereo()
Fixes: runtime error: signed integer overflow: 2080374785 + 2080374784 cannot be represented in type 'int'
Fixes: 2351/clusterfuzz-testcase-minimized-5359403240783872
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=73ea2a028e12a7d779834f78dc496c8c4b08361f
---
libavcodec/wavpack.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index e127c272a9..bc4b030425 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -480,7 +480,7 @@ static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb,
}
if (type == AV_SAMPLE_FMT_S16P) {
- if (FFABS(L) + FFABS(R) > (1<<19)) {
+ if (FFABS(L) + (unsigned)FFABS(R) > (1<<19)) {
av_log(s->avctx, AV_LOG_ERROR, "sample %d %d too large\n", L, R);
return AVERROR_INVALIDDATA;
}
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