This fixes out of array writes
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Kostya Shishkov <kostya.shishkov@gmail.com>
mb_height = s->mb_height >> v->field_mode;
for (i = 0; i <= n_slices; i++) {
if (i > 0 && slices[i - 1].mby_start >= mb_height) {
+ if (v->field_mode <= 0) {
+ av_log(v->s.avctx, AV_LOG_ERROR, "Slice %d starts beyond "
+ "picture boundary (%d >= %d)\n", i,
+ slices[i - 1].mby_start, mb_height);
+ continue;
+ }
v->second_field = 1;
v->blocks_off = s->mb_width * s->mb_height << 1;
v->mb_off = s->mb_stride * s->mb_height >> 1;