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vp9/count_segs: fix out of bounds read

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don't access mi until mi_{row,col} validation has been done

Change-Id: Ie1be052612cfccb2730dff9281c222bca28bf2c6
This commit is contained in:
James Zern
2013-05-02 19:11:28 -07:00
parent 879a2f053d
commit bc3c6d0a15
1 changed files with 2 additions and 1 deletions
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3
vp9/encoder/vp9_segmentation.c
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@@ -123,11 +123,12 @@ static void count_segs(VP9_COMP *cpi,
int bw, int bh, int mi_row, int mi_col) {
VP9_COMMON *const cm = &cpi->common;
MACROBLOCKD *const xd = &cpi->mb.e_mbd;
const int segment_id = mi->mbmi.segment_id;
int segment_id;
if (mi_row >= cm->mi_rows || mi_col >= cm->mi_cols)
return;
segment_id = mi->mbmi.segment_id;
xd->mode_info_context = mi;
set_mi_row_col(cm, xd, mi_row, bh, mi_col, bw);