From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Tue, 28 May 2013 15:47:23 +0000 (+0000)
Subject: Btrfs: avoid double free of fs_info->qgroup_ulist
X-Git-Tag: v3.11-rc1~70^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb1716af887375f1e2099f69bb89dfc5bd169bfa;p=pandora-kernel.git

Btrfs: avoid double free of fs_info->qgroup_ulist

When btrfs_read_qgroup_config or btrfs_quota_enable return non-zero, we've
already freed the fs_info->qgroup_ulist. The final btrfs_free_qgroup_config
called from quota_disable makes another ulist_free(fs_info->qgroup_ulist)
call.

We set fs_info->qgroup_ulist to NULL on the mentioned error paths, turning
the ulist_free in btrfs_free_qgroup_config into a noop.

Cc: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

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