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bink: fix out of reference frame read 

Fixes Ticket1374

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-06-02 19:56:10 +02:00
parent 1bf22c3a8f
commit b3675f890a
1 changed files with 5 additions and 0 deletions
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5
libavcodec/bink.c
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@ -1128,6 +1128,11 @@ static int bink_decode_plane(BinkContext *c, GetBitContext *gb, int plane_idx,
xoff = get_value(c, BINK_SRC_X_OFF);
yoff = get_value(c, BINK_SRC_Y_OFF);
ref = prev + xoff + yoff * stride;
if (ref < ref_start || ref > ref_end) {
av_log(c->avctx, AV_LOG_ERROR, "Copy out of bounds @%d, %d\n",
bx*8 + xoff, by*8 + yoff);
return -1;
}
c->dsp.put_pixels_tab[1][0](dst, ref, stride, 8);
memset(dctblock, 0, sizeof(*dctblock) * 64);
dctblock[0] = get_value(c, BINK_SRC_INTER_DC);