Commit bdf70b9e authored by Josef Bacik's avatar Josef Bacik Committed by David Sterba
Browse files

btrfs: hold a root ref in btrfs_get_dentry 



Looking up the inode we need to search the root, make sure we hold a
reference on that root while we're doing the lookup.

Signed-off-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 9326f76f

fs/btrfs/export.c

+5 −0
Original line number Diff line number Diff line
@@ -82,12 +82,17 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid, 
		err = PTR_ERR(root);

		goto fail;

	}

	if (!btrfs_grab_fs_root(root)) {

		err = -ENOENT;

		goto fail;

	}



	key.objectid = objectid;

	key.type = BTRFS_INODE_ITEM_KEY;

	key.offset = 0;



	inode = btrfs_iget(sb, &key, root);

	btrfs_put_fs_root(root);

	if (IS_ERR(inode)) {

		err = PTR_ERR(inode);

		goto fail;