From 8f71f3e0e4fb5a2445fb93d3057a33aefc4aa30d Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@oracle.com>
Date: Mon, 4 Mar 2013 16:25:36 +0000
Subject: [PATCH] Btrfs: check for NULL pointer in updating reloc roots
Add a check for NULL pointer to avoid invalid reference.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---
fs/btrfs/relocation.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index ba5a3210da9a..16e0c6fbdbed 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1269,6 +1269,8 @@ static int __update_reloc_root(struct btrfs_root *root, int del)
}
spin_unlock(&rc->reloc_root_tree.lock);
+ if (!node)
+ return 0;
BUG_ON((struct btrfs_root *)node->data != root);
if (!del) {
--
GitLab