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In svq3 decoder, check negative mb_type, fix potential crash.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Baptiste Coudurier 2011-05-04 18:45:36 -07:00 committed by Michael Niedermayer
parent 6c2845600d
commit 0fa8d19987
1 changed files with 1 additions and 1 deletions
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2
libavcodec/svq3.c
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@ -1049,7 +1049,7 @@ static int svq3_decode_frame(AVCodecContext *avctx,
} else if (s->pict_type == AV_PICTURE_TYPE_B && mb_type >= 4) {
mb_type += 4;
}
if (mb_type > 33 || svq3_decode_mb(svq3, mb_type)) {
if ((unsigned)mb_type > 33 || svq3_decode_mb(svq3, mb_type)) {
av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
return -1;
}