diff mbox

Btrfs: check return value of ulist_alloc() properly

Message ID 201209060618.AA00004@FM-323941448.jp.fujitsu.com (mailing list archive)
State New, archived
Headers show

Commit Message

Tsutomu Itoh Sept. 6, 2012, 6:18 a.m. UTC 
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>
---
 fs/btrfs/qgroup.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)


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diff mbox

Patch

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 38b42e7..7aee652 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1473,6 +1473,10 @@  int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes)
 	 * be exceeded
 	 */
 	ulist = ulist_alloc(GFP_ATOMIC);
+	if (!ulist) {
+		ret = -ENOMEM;
+		goto out;
+	}
 	ulist_add(ulist, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC);
 	ULIST_ITER_INIT(&uiter);
 	while ((unode = ulist_next(ulist, &uiter))) {
@@ -1545,6 +1549,10 @@  void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes)
 		goto out;
 
 	ulist = ulist_alloc(GFP_ATOMIC);
+	if (!ulist) {
+		btrfs_std_error(fs_info, -ENOMEM);
+		goto out;
+	}
 	ulist_add(ulist, qgroup->qgroupid, (unsigned long)qgroup, GFP_ATOMIC);
 	ULIST_ITER_INIT(&uiter);
 	while ((unode = ulist_next(ulist, &uiter))) {