From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1F7EA2D8DA8; Sat, 12 Sep 2026 13:56:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789221398; cv=none; b=iC2HEW0I6ECw5iG7U5uctkV3NyXhQeQueqVDP9hJ/WZJcXBZaBmZOVWv2uSSkKx/H8YLW2pXQaCV1Ct26Fe63CtC7UHTtIdmPfyhwExgbZhKhds4wOXr9SF3O3fdevIbjQFhGqD428cNTPlElY10fVUGnbnZLVvJwIdomFwtWlQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789221398; c=relaxed/simple; bh=OLIQiDKHHkZEattZqMsFKQDyfeoPs+9XRBgRapkipTY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dhhP8CU0wi7Q1j6aeaR/BmrNZVUqN62mdCeP8EyJciRbI6xy1m3Ox30aZKAoyhyWsF2VT5/m/4IfvxX+R9ecuJmz2k4cVjQnVpOzMHBGRgVxproGxb0xVh+V1w5HOEDx8iyAYZmjQS8P36xwHIoAmlqEi2+k3+H+hBmKX3RMntE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DzQoNflW; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DzQoNflW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D74BE1F000FF; Sat, 12 Sep 2026 13:56:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789221396; bh=ht+vGhY+W28DwxGloiXOcW+HAhG4eKWOQOQrKNf0yxM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DzQoNflWDaSDWSeCsxEqGt74TzMTJNqEvH03thboqnieyFli/lNv83RyLobMH1vN4 5oE7fVE5M5Fhh+SCIL3dBnG2O4lafGzcr30+XXdnWmtFvQopG4AjMT3i6ns2+ycbhf Q/Ls5un5DqgloEgZH3o+ojz9Rw6qSrF5GlAxwWO8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, SJ Park , Andrew Morton Subject: [PATCH 6.6 0347/1424] mm/damon/sysfs: kobject_del() region and target (error) dirs Date: Sat, 12 Sep 2026 08:46:19 +0200 Message-ID: <20260912065615.060421467@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: SJ Park commit 2603ef6f6ec3d3f7de2d6a07e7c9a683cebac419 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 the normal creation path of region directories and the error path of target directories, by adding kobject_del() calls. Link: https://lore.kernel.org/20260628220121.97360-3-sj@kernel.org Fixes: 2031b14ea757 ("mm/damon/sysfs: support the physical address space monitoring") Signed-off-by: SJ Park Cc: # 5.18.x Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- mm/damon/sysfs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -107,8 +107,10 @@ static void damon_sysfs_regions_rm_dirs( struct damon_sysfs_region **regions_arr = regions->regions_arr; int i; - for (i = 0; i < regions->nr; i++) + for (i = 0; i < regions->nr; i++) { + kobject_del(®ions_arr[i]->kobj); kobject_put(®ions_arr[i]->kobj); + } regions->nr = 0; kfree(regions_arr); regions->regions_arr = NULL; @@ -343,13 +345,15 @@ static int damon_sysfs_targets_add_dirs( err = damon_sysfs_target_add_dirs(target); if (err) - goto out; + goto del_out; targets_arr[i] = target; targets->nr++; } return 0; +del_out: + kobject_del(&target->kobj); out: damon_sysfs_targets_rm_dirs(targets); kobject_put(&target->kobj);