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Code Issues Releases Activity

avcodec/snowdec: Fix runtime error: signed integer overflow: 1404 * 8388608 cannot be represented in type 'int'

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Fixes: 2004/clusterfuzz-testcase-minimized-5533262866808832

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 2017-06-02 18:13:20 +02:00
parent 6f35c21659
commit 14b6adfd46
1 changed files with 2 additions and 2 deletions
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4
libavcodec/snowdec.c
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@ -228,9 +228,9 @@ static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand
for(x=0; x<w; x++){
int i= line[x];
if(i<0){
line[x]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
line[x]= -((-i*(unsigned)qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
}else if(i>0){
line[x]= (( i*qmul + qadd)>>(QEXPSHIFT));
line[x]= (( i*(unsigned)qmul + qadd)>>(QEXPSHIFT));
}
}
}