[FFmpeg-cvslog] avcodec/ac3dec_fixed: Fix multiple runtime error: signed integer overflow: -39271008 * 59 cannot be represented in type 'int'

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Thu Jun  8 13:44:32 2017 +0200| [cd16f4cf4b08d46b1284768522be4b71ae6fc71e] | committer: Michael Niedermayer

avcodec/ac3dec_fixed: Fix multiple runtime error: signed integer overflow: -39271008 * 59 cannot be represented in type 'int'

Fixes: 2113/clusterfuzz-testcase-minimized-6510704959946752

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 4e3ab1a5c12fe3a88f44b734d3f2e25f4769ec47)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cd16f4cf4b08d46b1284768522be4b71ae6fc71e
---

 libavcodec/ac3dec_fixed.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ac3dec_fixed.c b/libavcodec/ac3dec_fixed.c
index c5b1d50a13..56b62548ec 100644
--- a/libavcodec/ac3dec_fixed.c
+++ b/libavcodec/ac3dec_fixed.c
@@ -65,7 +65,7 @@ static void scale_coefs (
     int len)
 {
     int i, shift, round;
-    int16_t mul;
+    unsigned mul;
     int temp, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
 
     mul = (dynrng & 0x1f) + 0x20;