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| author | Tsutomu Itoh | 2012-09-06 08:18:10 +0200 |
|---|---|---|
| committer | Chris Mason | 2012-10-01 21:19:14 +0200 |
| commit | 3d6b5c3b5c0b970ce8a9d3bac6854f5c0ce0295a (patch) | |
| tree | aadfc9ad81660e5ef11121a4529213e8cd1062de /fs/btrfs/qgroup.c | |
| parent | Btrfs: fix error handling in delete_block_group_cache() (diff) | |
| download | kernel-qcow2-linux-3d6b5c3b5c0b970ce8a9d3bac6854f5c0ce0295a.tar.gz kernel-qcow2-linux-3d6b5c3b5c0b970ce8a9d3bac6854f5c0ce0295a.tar.xz kernel-qcow2-linux-3d6b5c3b5c0b970ce8a9d3bac6854f5c0ce0295a.zip | |
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>
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 9b707ba5c6c4..5039686df6ae 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1469,6 +1469,10 @@ 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, (uintptr_t)qgroup, GFP_ATOMIC); ULIST_ITER_INIT(&uiter); while ((unode = ulist_next(ulist, &uiter))) { @@ -1541,6 +1545,10 @@ 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, (uintptr_t)qgroup, GFP_ATOMIC); ULIST_ITER_INIT(&uiter); while ((unode = ulist_next(ulist, &uiter))) { |