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authorTsutomu Itoh <t-itoh@jp.fujitsu.com>2011-01-05 02:32:22 +0000
committerChris Mason <chris.mason@oracle.com>2011-01-16 11:30:20 -0500
commit91ca338d776e0cefb255bf2979b6448febd880f5 (patch)
tree5d1d344d6ed565faf5612b5c695f00c04e6f01d8 /fs/btrfs/ctree.c
parentff175d57f057f77d2d3031d674c2af9167a4af02 (diff)
btrfs: check NULL or not
Should check if functions returns NULL or not. Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ctree.c')
-rw-r--r--fs/btrfs/ctree.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 99599f1c155..b5baff0dccf 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2516,6 +2516,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_assert_tree_locked(path->nodes[1]);
right = read_node_slot(root, upper, slot + 1);
+ if (right == NULL)
+ return 1;
+
btrfs_tree_lock(right);
btrfs_set_lock_blocking(right);
@@ -2766,6 +2769,9 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_assert_tree_locked(path->nodes[1]);
left = read_node_slot(root, path->nodes[1], slot - 1);
+ if (left == NULL)
+ return 1;
+
btrfs_tree_lock(left);
btrfs_set_lock_blocking(left);