From: Markus Elfring <Markus.Elfring@web.de>
To: Muchun Song <songmuchun@bytedance.com>,
Xiongchun Duan <duanxiongchun@bytedance.com>,
linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@redhat.com>,
Kirill Tkhai <ktkhai@virtuozzo.com>,
Yang Shi <yang.shi@linux.alibaba.com>
Subject: Re: [PATCH v4] mm/ksm: Fix NULL pointer dereference when KSM zero page is enabled
Date: Thu, 16 Apr 2020 08:00:36 +0200 [thread overview]
Message-ID: <039d201a-a5fc-5ce2-54a1-f236531f9829@web.de> (raw)
In-Reply-To: <20200416025034.29780-1-songmuchun@bytedance.com>
> to a crash when we access vm_mm(its offset is 0x40) later in
Would the text variant “… vm_mm (its …” be a bit nicer?
…
> +++ b/mm/ksm.c
> @@ -2112,8 +2112,15 @@ static void cmp_and_merge_page(struct page *page, struct rmap_item *rmap_item)
…
> + if (vma)
> + err = try_to_merge_one_page(vma, page,
> + ZERO_PAGE(rmap_item->address));
Can the parameter alignment trigger further software development considerations
for such a function call?
Regards,
Markus
next prev parent reply other threads:[~2020-04-16 6:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-16 2:50 [PATCH v4] mm/ksm: Fix NULL pointer dereference when KSM zero page is enabled Muchun Song
2020-04-16 2:58 ` Andrew Morton
2020-04-16 6:14 ` Markus Elfring
2020-04-16 11:20 ` Kirill Tkhai
2020-04-16 20:05 ` Joe Perches
2020-04-16 6:00 ` Markus Elfring [this message]
2020-04-16 11:21 ` Matthew Wilcox
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