diff options
| -rw-r--r-- | block/qcow2-cluster.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index cca76d4fcd..fd3054b2d8 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -266,12 +266,15 @@ static int count_contiguous_clusters(uint64_t nb_clusters, int cluster_size, uint64_t *l2_table, uint64_t start, uint64_t stop_flags) { int i; - uint64_t mask = stop_flags | L2E_OFFSET_MASK; - uint64_t offset = be64_to_cpu(l2_table[0]) & mask; + uint64_t mask = stop_flags | L2E_OFFSET_MASK | QCOW2_CLUSTER_COMPRESSED; + uint64_t first_entry = be64_to_cpu(l2_table[0]); + uint64_t offset = first_entry & mask; if (!offset) return 0; + assert(qcow2_get_cluster_type(first_entry) != QCOW2_CLUSTER_COMPRESSED); + for (i = start; i < start + nb_clusters; i++) { uint64_t l2_entry = be64_to_cpu(l2_table[i]) & mask; if (offset + (uint64_t) i * cluster_size != l2_entry) { |