diff options
Diffstat (limited to 'block/qcow2-refcount.c')
| -rw-r--r-- | block/qcow2-refcount.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index e79895d11..9507aef84 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -656,7 +656,9 @@ retry: /* Make sure that all offsets in the "allocated" range are representable * in an int64_t */ - if (s->free_cluster_index - 1 > (INT64_MAX >> s->cluster_bits)) { + if (s->free_cluster_index > 0 && + s->free_cluster_index - 1 > (INT64_MAX >> s->cluster_bits)) + { return -EFBIG; } |