If it was set before then we can end up trying to decode a slice without
a valid slice header, which can lead to invalid memory access.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
hx->intra_gb_ptr =
hx->inter_gb_ptr = NULL;
- if ((err = decode_slice_header(hx, h)) < 0)
+ if ((err = decode_slice_header(hx, h)) < 0) {
+ /* make sure data_partitioning is cleared if it was set
+ * before, so we don't try decoding a slice without a valid
+ * slice header later */
+ h->data_partitioning = 0;
break;
+ }
hx->data_partitioning = 1;
break;