[FFmpeg-cvslog] avcodec/ac3dec_fixed: Fix integer overflow in scale_coefs()
Michael Niedermayer
git at videolan.org
Thu Feb 1 01:53:11 EET 2018
ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jan 14 00:39:39 2018 +0100| [b51f1f5a1911b607e377d442cb9cbd74eb8d646a] | committer: Michael Niedermayer
avcodec/ac3dec_fixed: Fix integer overflow in scale_coefs()
Fixes: runtime error: signed integer overflow: 2147483520 + 128 cannot be represented in type 'int'
Fixes: 4800/clusterfuzz-testcase-minimized-6110372403609600
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 a1f38c75893c852cf19dcf3e4553549ba1e70950)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b51f1f5a1911b607e377d442cb9cbd74eb8d646a
---
libavcodec/ac3dec_fixed.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/ac3dec_fixed.c b/libavcodec/ac3dec_fixed.c
index c0a40ba6f3..332a0622f5 100644
--- a/libavcodec/ac3dec_fixed.c
+++ b/libavcodec/ac3dec_fixed.c
@@ -64,8 +64,8 @@ static void scale_coefs (
int dynrng,
int len)
{
- int i, shift, round;
- unsigned mul;
+ int i, shift;
+ unsigned mul, round;
int temp, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
mul = (dynrng & 0x1f) + 0x20;
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