[FFmpeg-cvslog] avcodec/wavpack: Fix integer overflow

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Fri Jun 23 01:58:48 2017 +0200| [fe74c2364ee3ac0478abf5c579d3ac27e02fc30c] | committer: Michael Niedermayer

avcodec/wavpack: Fix integer overflow

Fixes: runtime error: signed integer overflow: 227511904 + 1964113935 cannot be represented in type 'int'
Fixes: 2331/clusterfuzz-testcase-minimized-6182185830711296

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 24e95f9d4de012f51fdd5767dff0b3142e13ec3a)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fe74c2364ee3ac0478abf5c579d3ac27e02fc30c
---

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

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 7a87aa36f0..1bb778f6a5 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -219,7 +219,7 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
         INC_MED(1);
         DEC_MED(2);
     } else {
-        base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2);
+        base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2U);
         add  = GET_MED(2) - 1;
         INC_MED(0);
         INC_MED(1);