Re: [syzbot] [PATCH] test 305230142ae0

[syzbot <syzbot+4d81015bc10889fd12ea@syzkaller.appspotmail.com>]

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Subject: [PATCH] test 305230142ae0
Author: eadavis@qq.com

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

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index edb84cc03237..6cd89248e530 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -204,6 +204,7 @@ static struct btrfs_qgroup *add_qgroup_rb(struct btrfs_fs_info *fs_info,
 	struct rb_node **p = &fs_info->qgroup_tree.rb_node;
 	struct rb_node *parent = NULL;
 	struct btrfs_qgroup *qgroup;
+	u64 objid;
 
 	/* Caller must have pre-allocated @prealloc. */
 	ASSERT(prealloc);
@@ -232,6 +233,7 @@ static struct btrfs_qgroup *add_qgroup_rb(struct btrfs_fs_info *fs_info,
 
 	rb_link_node(&qgroup->node, parent, p);
 	rb_insert_color(&qgroup->node, &fs_info->qgroup_tree);
+	while (!btrfs_get_free_objectid(fs_info->tree_root, &objid) && objid <= qgroupid);
 
 	return qgroup;
 }
-- 
2.25.1