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-rw-r--r--fs/btrfs/ioctl.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 4e50b62db2a8..fea5d37528b8 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -790,6 +790,9 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir,
return -EOPNOTSUPP;
}
+ if (btrfs_root_refs(&root->root_item) == 0)
+ return -ENOENT;
+
if (!test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
return -EINVAL;