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

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Jun 23 01:58:48 2017 +0200| [24e95f9d4de012f51fdd5767dff0b3142e13ec3a] | 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>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=24e95f9d4de012f51fdd5767dff0b3142e13ec3a
---

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

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index ac43c13da5..e127c272a9 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -225,7 +225,7 @@ 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);