Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: [email protected]
---
libavcodec/vc1dec.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 20633d7..0feff21 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -5966,6 +5966,12 @@ static int vc1_decode_frame(AVCodecContext *avctx, void
*data,
s->uvlinesize <<= 1;
}
mb_height = s->mb_height >> v->field_mode;
+
+ if (!mb_height) {
+ av_log(v->s.avctx, AV_LOG_ERROR, "Invalid mb_height.\n");
+ goto err;
+ }
+
for (i = 0; i <= n_slices; i++) {
if (i > 0 && slices[i - 1].mby_start >= mb_height) {
if (v->field_mode <= 0) {
--
1.8.3.2
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