queue-7.2/mm-damon-sysfs-schemes-kobject_del-scheme-region-dirs.patch

From f3ec3271210781c255e737498b84d5790e8176b4 Mon Sep 17 00:00:00 2001
From: SJ Park <sj@kernel.org>
Date: Sun, 28 Jun 2026 15:01:13 -0700
Subject: mm/damon/sysfs-schemes: kobject_del() scheme region dirs

From: SJ Park <sj@kernel.org>

commit f3ec3271210781c255e737498b84d5790e8176b4 upstream.

On CONFIG_DEBUG_KOBJECT_RELEASE enabled kernel, lack of kobject_del()
could cause directories creation failures due to the name conflicts.  Fix
those issues for scheme region directories by adding kobject_del() calls.

This issue was discovered [1] by Sashiko, though its analysis was
partially incorrect.

Link: https://lore.kernel.org/20260628220121.97360-5-sj@kernel.org
Link: https://lore.kernel.org/20260517205828.6204-1-sj@kernel.org [1]
Fixes: 9277d0367ba1 ("mm/damon/sysfs-schemes: implement scheme region directory")
Signed-off-by: SJ Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> # 6.2.x
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/damon/sysfs-schemes.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -332,6 +332,7 @@ static void damon_sysfs_scheme_regions_r
 	list_for_each_entry_safe(r, next, &regions->regions_list, list) {
 		damos_sysfs_region_rm_dirs(r);
 		list_del(&r->list);
+		kobject_del(&r->kobj);
 		kobject_put(&r->kobj);
 		regions->nr_regions--;
 	}