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authorWang Shilong <wangsl-fnst@cn.fujitsu.com>2013-03-25 11:08:23 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-03-28 09:51:29 -0400
commita7975026ff9ddf91ba190ae2b71699dd156395e3 (patch)
tree6161c6ac3b7a0b2cbcc40b0126c69a261768b4ed /fs/btrfs/qgroup.c
parentfdf30d1c1b386e1b73116cc7e0fb14e962b763b0 (diff)
downloadvexpress-lsk-a7975026ff9ddf91ba190ae2b71699dd156395e3.tar.gz
Btrfs: fix double free in the btrfs_qgroup_account_ref()
The function btrfs_find_all_roots is responsible to allocate memory for 'roots' and free it if errors happen,so the caller should not free it again since the work has been done. Besides,'tmp' is allocated after the function btrfs_find_all_roots, so we can return directly if btrfs_find_all_roots() fails. Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
-rw-r--r--fs/btrfs/qgroup.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 5471e47d655..b44124dd237 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -1153,7 +1153,7 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
ret = btrfs_find_all_roots(trans, fs_info, node->bytenr,
sgn > 0 ? node->seq - 1 : node->seq, &roots);
if (ret < 0)
- goto out;
+ return ret;
spin_lock(&fs_info->qgroup_lock);
quota_root = fs_info->quota_root;
@@ -1275,7 +1275,6 @@ int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans,
ret = 0;
unlock:
spin_unlock(&fs_info->qgroup_lock);
-out:
ulist_free(roots);
ulist_free(tmp);