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-rw-r--r--block/qcow2-refcount.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index d42c6e6..e6c857e 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -513,7 +513,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
l1_size2 = l1_size * sizeof(uint64_t);
l1_allocated = 0;
if (l1_table_offset != s->l1_table_offset) {
- l1_table = qemu_malloc(l1_size2);
+ l1_table = qemu_mallocz(align_offset(l1_size2, 512));
l1_allocated = 1;
if (bdrv_pread(s->hd, l1_table_offset,
l1_table, l1_size2) != l1_size2)
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