diff options
Diffstat (limited to 'block/qcow2-refcount.c')
| -rw-r--r-- | block/qcow2-refcount.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 9a5ae3cac4..bdac7b1780 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -1680,10 +1680,22 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res, for (i = 0; i < s->l2_size; i++) { uint64_t coffset; int csize; + QCow2ClusterType type; + l2_entry = get_l2_entry(s, l2_table, i); l2_bitmap = get_l2_bitmap(s, l2_table, i); + type = qcow2_get_cluster_type(bs, l2_entry); + + if (type != QCOW2_CLUSTER_COMPRESSED) { + /* Check reserved bits of Standard Cluster Descriptor */ + if (l2_entry & L2E_STD_RESERVED_MASK) { + fprintf(stderr, "ERROR found l2 entry with reserved bits set: " + "%" PRIx64 "\n", l2_entry); + res->corruptions++; + } + } - switch (qcow2_get_cluster_type(bs, l2_entry)) { + switch (type) { case QCOW2_CLUSTER_COMPRESSED: /* Compressed clusters don't have QCOW_OFLAG_COPIED */ if (l2_entry & QCOW_OFLAG_COPIED) { |