Commit e1409cef authored by Miao Xie's avatar Miao Xie Committed by Josef Bacik
Browse files

Btrfs: fix unprotected root node of the subvolume's inode rb-tree 



The root node of the rb-tree may be changed, so we should get it under
the lock. Fix it.

Signed-off-by: default avatarMiao Xie <miaox@cn.fujitsu.com>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
parent 89042e5a

fs/btrfs/inode.c

+3 −4
Original line number Diff line number Diff line
@@ -4843,14 +4843,13 @@ static void inode_tree_add(struct inode *inode) 
	struct rb_node **p;

	struct rb_node *parent;

	u64 ino = btrfs_ino(inode);

again:

	p = &root->inode_tree.rb_node;

	parent = NULL;



	if (inode_unhashed(inode))

		return;



again:

	parent = NULL;

	spin_lock(&root->inode_lock);

	p = &root->inode_tree.rb_node;

	while (*p) {

		parent = *p;

		entry = rb_entry(parent, struct btrfs_inode, rb_node);