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-rw-r--r--block/qcow2.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/qcow2.c b/block/qcow2.c
index a9c39bd81..9637f2ea3 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -642,7 +642,7 @@ static int get_bits_from_size(size_t size)
static int preallocate(BlockDriverState *bs)
{
BDRVQcowState *s = bs->opaque;
- uint64_t cluster_offset;
+ uint64_t cluster_offset = 0;
uint64_t nb_sectors;
uint64_t offset;
int num;