[FFmpeg-devel] [PATCH 1/2] avcodec/wavpack: Fix: runtime error: signed integer overflow: 3 * -2147483648 cannot be represented in type 'int'

[Michael Niedermayer]

Fixes: 1776/clusterfuzz-testcase-minimized-6191258231898112

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
 libavcodec/wavpack.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 74ca2d492c..1b13b676b6 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -542,9 +542,9 @@ static inline int wv_unpack_mono(WavpackFrameContext *s, 
GetBitContext *gb,
             t = s->decorr[i].value;
             if (t > 8) {
                 if (t & 1)
-                    A =  2 * s->decorr[i].samplesA[0] - 
s->decorr[i].samplesA[1];
+                    A =  2U * s->decorr[i].samplesA[0] - 
s->decorr[i].samplesA[1];
                 else
-                    A = (3 * s->decorr[i].samplesA[0] - 
s->decorr[i].samplesA[1]) >> 1;
+                    A = (int)(3U * s->decorr[i].samplesA[0] - 
s->decorr[i].samplesA[1]) >> 1;
                 s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0];
                 j                        = 0;
             } else {
-- 
2.13.0

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