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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
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>
-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);