Btrfs: check return value of ulist_alloc() properly
ulist_alloc() has the possibility of returning NULL.
So, it is necessary to check the return value.
Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 9b707ba..5039686 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1469,6 +1469,10 @@
* be exceeded
*/
ulist = ulist_alloc(GFP_ATOMIC);
+ if (!ulist) {
+ ret = -ENOMEM;
+ goto out;
+ }
ulist_add(ulist, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC);
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(ulist, &uiter))) {
@@ -1541,6 +1545,10 @@
goto out;
ulist = ulist_alloc(GFP_ATOMIC);
+ if (!ulist) {
+ btrfs_std_error(fs_info, -ENOMEM);
+ goto out;
+ }
ulist_add(ulist, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC);
ULIST_ITER_INIT(&uiter);
while ((unode = ulist_next(ulist, &uiter))) {