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nutdec: check maxpos in read_sm_data before returning success 

Otherwise sm_size can be larger than size, which results in a negative
packet size.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 6b9fdf7f4f)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit eddf146ada)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Andreas Cadhalpun 2015-06-27 17:50:56 +02:00 committed by Michael Niedermayer
parent fdf166c5d2
commit a3d3e0a6bc
1 changed files with 3 additions and 0 deletions
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3
libavformat/nutdec.c
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@ -950,6 +950,9 @@ static int read_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int
AV_WL32(dst+4, skip_end);
}
if (avio_tell(bc) >= maxpos)
return AVERROR_INVALIDDATA;
return 0;
}