Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block/qcow2-refcount.c | 2 +-
block/qcow2.h | 2 ++
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 2ec3aa7..50bf44e 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -167,7 +167,7 @@ static int alloc_refcount_block(BlockDriverState *bs,
if (refcount_table_index < s->refcount_table_size) {
uint64_t refcount_block_offset =
- s->refcount_table[refcount_table_index];
+ s->refcount_table[refcount_table_index] & REFT_OFFSET_MASK;
/* If it's already there, we're done */
if (refcount_block_offset) {
diff --git a/block/qcow2.h b/block/qcow2.h
index a22d7fa..291309a 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -175,6 +175,8 @@ enum {
#define L2E_OFFSET_MASK 0x00ffffffffffff00ULL
#define L2E_COMPRESSED_OFFSET_SIZE_MASK 0x3fffffffffffffffULL
+#define REFT_OFFSET_MASK 0xffffffffffffff00ULL
+
static inline int size_to_clusters(BDRVQcowState *s, int64_t size)
{
return (size + (s->cluster_size - 1)) >> s->cluster_bits;
--
1.7.6.5
