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Fixed overreads in TTA decoder with corrupted bistreams.

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Originally committed as revision 22176 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Laurent Aimar 2010-03-03 19:31:46 +00:00
parent 19c8c4ecf4
commit a9837b58e1
1 changed files with 9 additions and 2 deletions
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11
libavcodec/tta.c
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@ -332,9 +332,14 @@ static int tta_decode_frame(AVCodecContext *avctx,
unary--;
}
if (k)
if (get_bits_left(&s->gb) < k)
return -1;
if (k) {
if (k > MIN_CACHE_BITS)
return -1;
value = (unary << k) + get_bits(&s->gb, k);
else
} else
value = unary;
// FIXME: copy paste from original
@ -404,6 +409,8 @@ static int tta_decode_frame(AVCodecContext *avctx,
}
}
if (get_bits_left(&s->gb) < 32)
return -1;
skip_bits(&s->gb, 32); // frame crc
// convert to output buffer