Re: [syzbot] [PATCH] test 305230142ae0

[syzbot]

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Subject: [PATCH] test 305230142ae0
Author: eadavis@xxxxxx

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 305230142ae0

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 401ea09ae4b8..d2b6e4d18c89 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -4931,7 +4931,8 @@ int btrfs_get_free_objectid(struct btrfs_root *root, u64 *objectid)
 		goto out;
 	}
 
-	*objectid = root->free_objectid++;
+	while (find_qgroup_rb(root->fs_info, root->free_objectid++);
+	*objectid = root->free_objectid;
 	ret = 0;
 out:
 	mutex_unlock(&root->objectid_mutex);