From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:19951 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751161AbbCIRK1 (ORCPT ); Mon, 9 Mar 2015 13:10:27 -0400 From: Anand Jain To: linux-btrfs@vger.kernel.org Cc: dsterba@suse.cz Subject: [PATCH 01/26] Btrfs: sysfs: fix, btrfs_release_super_kobj() should to clean up the kobject data Date: Tue, 10 Mar 2015 06:38:19 +0800 Message-Id: <1425940724-7744-2-git-send-email-anand.jain@oracle.com> In-Reply-To: <1425940724-7744-1-git-send-email-anand.jain@oracle.com> References: <1425940724-7744-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: From: Anand Jain The following test case fails indicating that, thread tried to init an initialized object. kernel: [232104.016513] kobject (ffff880006c1c980): tried to init an initialized object, something is seriously wrong. btrfs_sysfs_remove_one() self test code: open_tree() { :: ret = btrfs_sysfs_add_one(fs_info); if (ret) { pr_err("BTRFS: failed to init sysfs interface: %d\n", ret); goto fail_block_groups; } + btrfs_sysfs_remove_one(fs_info); + ret = btrfs_sysfs_add_one(fs_info); + if (ret) { + pr_err("BTRFS: failed to init sysfs interface: %d\n", ret); + goto fail_block_groups; + } cleaning up the unregistered kobject fixes this. Signed-off-by: Anand Jain --- fs/btrfs/sysfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 92db3f6..68dcd17 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -439,6 +439,8 @@ static struct attribute *btrfs_attrs[] = { static void btrfs_release_super_kobj(struct kobject *kobj) { struct btrfs_fs_info *fs_info = to_fs_info(kobj); + + memset(&fs_info->super_kobj, 0, sizeof(struct kobject)); complete(&fs_info->kobj_unregister); } -- 2.0.0.153.g79dcccc