From 248d200df34f3e44a4140f32dfc7428c52615332 Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Tue, 10 Mar 2015 06:38:19 +0800 Subject: [PATCH] Btrfs: sysfs: fix, btrfs_release_super_kobj() should to clean up the kobject data 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 Signed-off-by: David Sterba --- fs/btrfs/sysfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index e8a4c86d274d..db2f8aed2b7d 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); } -- 2.30.2