[FFmpeg-cvslog] avcodec/wavpack: Fix runtime error: signed integer overflow: 24 * -2147483648 cannot be represented in type 'int'

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Tue May 30 03:09:11 2017 +0200| [64168825dec02348010bce8ee664b2bdb6d66007] | committer: Michael Niedermayer

avcodec/wavpack: Fix runtime error: signed integer overflow: 24 * -2147483648 cannot be represented in type 'int'

Fixes: 1894/clusterfuzz-testcase-minimized-4716739789062144

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit d90c5bf10559554d6f9cd1dfb90767b991b76d5d)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=64168825dec02348010bce8ee664b2bdb6d66007
---

 libavcodec/wavpack.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index f828fc725b..a679d424eb 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -548,7 +548,7 @@ static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb,
             if (type != AV_SAMPLE_FMT_S16P)
                 S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10);
             else
-                S = T + ((s->decorr[i].weightA * A + 512) >> 10);
+                S = T + ((int)(s->decorr[i].weightA * (unsigned)A + 512) >> 10);
             if (A && T)
                 s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta;
             s->decorr[i].samplesA[j] = T = S;