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avcodec/aacdec_fixed: Fix multiple runtime error: shift exponent 127 is too large for 32-bit type 'int'

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Fixes: 1762/clusterfuzz-testcase-minimized-5150981081792512

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-23 12:40:22 +02:00
parent 37de7f7175
commit 620b452a11
1 changed files with 3 additions and 1 deletions
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4
libavcodec/aacdec_fixed.c
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@ -415,7 +415,9 @@ static void apply_independent_coupling_fixed(AACContext *ac,
c = cce_scale_fixed[gain & 7];
shift = (gain-1024) >> 3;
if (shift < 0) {
if (shift < -31) {
return;
} else if (shift < 0) {
shift = -shift;
round = 1 << (shift - 1);