avcodec/hevcpred_template: also initialize top[-1] for constrained intra prediction

Fixes out of array read Fixes: 387713a12dc5cfa27fcb4178084ce1ea-asan_stack-oob_131176a_1182_cov_3861068719_CAINIT_C_SHARP_3.bit Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
11 years ago · dfefc9097e
parent 8b8ae298af
commit dfefc9097e
1 changed files with 1 additions and 0 deletions
--- a/libavcodec/hevcpred_template.c
+++ b/libavcodec/hevcpred_template.c
@ -155,6 +155,7 @@ static void FUNC(intra_pred)(HEVCContext *s, int x0, int y0, int log2_size, int
            left[i] = 128;
            top[i]  = 128;
        }
+        top[-1] = 128;
    }
    if (cand_bottom_left) {
        for (i = size + bottom_left_size; i < (size << 1); i++)