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avcodec/dca_xll: Fix runtime error: signed integer overflow: -1073741824 * 32768 cannot be represented in type 'int'

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Fixes: 629/clusterfuzz-testcase-6697457381539840

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 2017-02-21 00:11:19 +01:00
parent 0a65dae9d0
commit e8a3498f24
1 changed files with 2 additions and 2 deletions
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4
libavcodec/dca_xll.c
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@ -717,10 +717,10 @@ static void chs_assemble_msbs_lsbs(DCAXllDecoder *s, DCAXllChSet *c, int band)
int32_t *lsb = b->lsb_sample_buffer[ch];
int adj = b->bit_width_adjust[ch];
for (n = 0; n < nsamples; n++)
msb[n] = msb[n] * (1 << shift) + (lsb[n] << adj);
msb[n] = msb[n] * (SUINT)(1 << shift) + (lsb[n] << adj);
} else {
for (n = 0; n < nsamples; n++)
msb[n] = msb[n] * (1 << shift);
msb[n] = msb[n] * (SUINT)(1 << shift);
}
}
}