From: "Yin, Fengwei" <fengwei.yin@intel.com>
To: Miaohe Lin <linmiaohe@huawei.com>, <akpm@linux-foundation.org>,
<mike.kravetz@oracle.com>, <songmuchun@bytedance.com>
Cc: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 5/6] mm/hugetlb: fix sysfs group leak in hugetlb_unregister_node()
Date: Wed, 17 Aug 2022 17:41:39 +0800 [thread overview]
Message-ID: <b44ef13c-c9df-5d08-f92f-649fef9d74ee@intel.com> (raw)
In-Reply-To: <20220816130553.31406-6-linmiaohe@huawei.com>
Hi Miaohe,
On 8/16/2022 9:05 PM, Miaohe Lin wrote:
> }
>
> if (h->demote_order) {
> - if (sysfs_create_group(hstate_kobjs[hi],
> - &hstate_demote_attr_group))
> + retval = sysfs_create_group(hstate_kobjs[hi],
> + &hstate_demote_attr_group);
What about add one more:
just return if hstate_attr_group creating failed:
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 0aee2f3ae15c..a67ef4b4eb3f 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3845,6 +3845,7 @@ static int hugetlb_sysfs_add_hstate(struct hstate *h, struct kobject *parent,
if (retval) {
kobject_put(hstate_kobjs[hi]);
hstate_kobjs[hi] = NULL;
+ return retval;
}
Once hstate_kobjs[hi] is set to NULL, hstate_demote_attr_group creating will
fail as well. Thanks.
Regards
Yin, Fengwei
> + if (retval) {
> pr_warn("HugeTLB unable to create demote interfaces for %s\n", h->name);
> + sysfs_remove_group(hstate_kobjs[hi], hstate_attr_group);
> + kobject_put(hstate_kobjs[hi]);
> + hstate_kobjs[hi] = NULL;
> + return retval;
> + }
> }
next prev parent reply other threads:[~2022-08-17 9:42 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-16 13:05 [PATCH 0/6] A few fixup patches for hugetlb Miaohe Lin
2022-08-16 13:05 ` [PATCH 1/6] mm/hugetlb: fix incorrect update of max_huge_pages Miaohe Lin
2022-08-16 22:52 ` Mike Kravetz
2022-08-16 23:20 ` Andrew Morton
2022-08-16 23:34 ` Mike Kravetz
2022-08-17 1:53 ` Miaohe Lin
2022-08-17 2:28 ` Muchun Song
2022-08-16 13:05 ` [PATCH 2/6] mm/hugetlb: fix WARN_ON(!kobj) in sysfs_create_group() Miaohe Lin
2022-08-16 22:55 ` Mike Kravetz
2022-08-17 2:31 ` Muchun Song
2022-08-17 2:39 ` Miaohe Lin
2022-08-16 13:05 ` [PATCH 3/6] mm/hugetlb: fix missing call to restore_reserve_on_error() Miaohe Lin
2022-08-16 23:31 ` Mike Kravetz
2022-08-17 1:59 ` Miaohe Lin
2022-08-16 13:05 ` [PATCH 4/6] mm: hugetlb_vmemmap: add missing smp_wmb() before set_pte_at() Miaohe Lin
2022-08-17 2:53 ` Muchun Song
2022-08-17 8:41 ` Miaohe Lin
2022-08-17 9:13 ` Yin, Fengwei
2022-08-17 11:21 ` Muchun Song
2022-08-18 1:14 ` Yin, Fengwei
2022-08-18 1:55 ` Miaohe Lin
2022-08-18 2:00 ` Yin, Fengwei
2022-08-18 2:47 ` Muchun Song
2022-08-18 7:52 ` Miaohe Lin
2022-08-18 7:59 ` Muchun Song
2022-08-18 8:32 ` Yin, Fengwei
2022-08-18 8:40 ` Muchun Song
2022-08-18 8:54 ` Yin, Fengwei
2022-08-18 9:18 ` Muchun Song
2022-08-18 12:58 ` Miaohe Lin
2022-08-18 23:53 ` Yin, Fengwei
2022-08-19 3:19 ` Muchun Song
2022-08-19 7:26 ` Miaohe Lin
2022-08-18 1:15 ` Yin, Fengwei
2022-08-20 8:12 ` Muchun Song
2022-08-22 8:45 ` Miaohe Lin
2022-08-22 10:23 ` Muchun Song
2022-08-23 1:42 ` Miaohe Lin
2022-08-16 13:05 ` [PATCH 5/6] mm/hugetlb: fix sysfs group leak in hugetlb_unregister_node() Miaohe Lin
2022-08-17 9:41 ` Yin, Fengwei [this message]
2022-08-18 1:00 ` Yin, Fengwei
2022-08-18 1:12 ` Yin, Fengwei
2022-08-16 13:05 ` [PATCH 6/6] mm/hugetlb: make detecting shared pte more reliable Miaohe Lin
2022-08-17 23:56 ` Mike Kravetz
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