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avcodec/aacdec_template: Fix fixed point scale in decode_cce()

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Fixes: runtime error: shift exponent 1073741824 is too large for 32-bit type 'int'
Fixes: 1654/clusterfuzz-testcase-minimized-5151903795118080

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-17 15:51:46 +02:00
parent a441aa90e8
commit 53a502206a
1 changed files with 5 additions and 1 deletions
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6
libavcodec/aacdec_template.c
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@ -2181,7 +2181,11 @@ static int decode_cce(AACContext *ac, GetBitContext *gb, ChannelElement *che)
coup->coupling_point += get_bits1(gb) || (coup->coupling_point >> 1);
sign = get_bits(gb, 1);
scale = AAC_RENAME(cce_scale)[get_bits(gb, 2)];
#if USE_FIXED
scale = get_bits(gb, 2);
#else
scale = cce_scale[get_bits(gb, 2)];
#endif
if ((ret = decode_ics(ac, sce, gb, 0, 0)))
return ret;