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@xxxxxxxxxxxxxx>
Signed-off-by: Jan Schmidt <list.btrfs@xxxxxxxxxxxxx>
---
fs/btrfs/qgroup.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 74b432d..c6ce642 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -430,8 +430,10 @@ out:
}
btrfs_free_path(path);
- if (ret < 0)
+ if (ret < 0) {
ulist_free(fs_info->qgroup_ulist);
+ fs_info->qgroup_ulist = NULL;
+ }
return ret < 0 ? ret : 0;
}
@@ -932,8 +934,10 @@ out_free_root:
kfree(quota_root);
}
out:
- if (ret)
+ if (ret) {
ulist_free(fs_info->qgroup_ulist);
+ fs_info->qgroup_ulist = NULL;
+ }
mutex_unlock(&fs_info->qgroup_ioctl_lock);
return ret;
}
--
1.7.1
--
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