From: Muchun Song <muchun.song@linux.dev>
To: Oscar Salvador <osalvador@suse.de>
Cc: Ge Yang <yangge1116@126.com>,
akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
21cnbao@gmail.com, david@redhat.com,
baolin.wang@linux.alibaba.com, liuzixing@hygon.cn
Subject: Re: [PATCH] mm/hugetlb: fix kernel NULL pointer dereference when replacing free hugetlb folios
Date: Fri, 23 May 2025 11:27:18 +0800 [thread overview]
Message-ID: <DF103E57-601C-4CBB-99CA-088E1C29F517@linux.dev> (raw)
In-Reply-To: <aC974OtOuj9Tqzsa@localhost.localdomain>
> On May 23, 2025, at 03:32, Oscar Salvador <osalvador@suse.de> wrote:
>
> On Thu, May 22, 2025 at 08:39:39PM +0800, Muchun Song wrote:
>> But I think we could use "folio_order() > MAX_PAGE_ORDER" to replace the check
>> of hstate_is_gigantic(), right? Then ee could remove the first parameter of hstate
>> from alloc_and_dissolve_hugetlb_folio() and obtain hstate in it.
>
> Yes, I think we can do that.
> So something like the following (compily-tested only) maybe?
>
> From d7199339e905f83b54d22849e8f21f631916ce94 Mon Sep 17 00:00:00 2001
> From: Oscar Salvador <osalvador@suse.de>
> Date: Thu, 22 May 2025 19:51:04 +0200
> Subject: [PATCH] TMP
>
> ---
> mm/hugetlb.c | 38 +++++++++-----------------------------
> 1 file changed, 9 insertions(+), 29 deletions(-)
Pretty simple. The code LGTM.
Thanks.
next prev parent reply other threads:[~2025-05-23 3:28 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-22 3:22 yangge1116
2025-05-22 3:47 ` Muchun Song
2025-05-22 5:34 ` Oscar Salvador
2025-05-22 7:13 ` Muchun Song
2025-05-22 10:13 ` Oscar Salvador
2025-05-22 11:34 ` Ge Yang
2025-05-22 11:49 ` Oscar Salvador
2025-05-22 12:39 ` Muchun Song
2025-05-22 19:32 ` Oscar Salvador
2025-05-23 3:27 ` Muchun Song [this message]
2025-05-23 3:46 ` Ge Yang
2025-05-23 3:56 ` Muchun Song
2025-05-23 5:30 ` Oscar Salvador
2025-05-23 8:07 ` Ge Yang
2025-05-22 11:50 ` Oscar Salvador
2025-05-26 12:41 ` David Hildenbrand
2025-05-26 12:57 ` Ge Yang
2025-05-26 12:59 ` David Hildenbrand
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