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avcodec/ac3dec_fixed: Fix integer overflow in scale_coefs()

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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@niedermayer.cc>
(cherry picked from commit a1f38c7589)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-01-14 00:39:39 +01:00
parent 23af1858fe
commit 7d5ca21698
1 changed files with 2 additions and 2 deletions
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4
libavcodec/ac3dec_fixed.c
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@ -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;