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avcodec/ac3dec_fixed: Fix runtime error: left shift of 419 by 23 places cannot be represented in type 'int'

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Fixes: 1352/clusterfuzz-testcase-minimized-5757565017260032

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 136ce8baa4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-04 13:02:51 +02:00
parent 6e67a3e22c
commit 257e6e3eca
1 changed files with 1 additions and 1 deletions
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libavcodec/ac3dec_fixed.c
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@ -69,7 +69,7 @@ static void scale_coefs (
int temp, temp1, temp2, temp3, temp4, temp5, temp6, temp7;
mul = (dynrng & 0x1f) + 0x20;
shift = 4 - ((dynrng << 23) >> 28);
shift = 4 - (sign_extend(dynrng, 9) >> 5);
if (shift > 0 ) {
round = 1 << (shift-1);
for (i=0; i<len; i+=8) {