Btrfs: Add a missing return pointer check

Add a missing kzalloc() return pointer check in add_missing_dev().

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index d6f1996de629..ecf0633ab8cc 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2755,6 +2755,8 @@ static struct btrfs_device *add_missing_dev(struct btrfs_root *root,
         struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
 
         device = kzalloc(sizeof(*device), GFP_NOFS);
+        if (!device)
+                return NULL;
         list_add(&device->dev_list,
                  &fs_devices->devices);
         device->barriers = 1;