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From: Andrew Morton <akpm@linux-foundation.org>
To: Muchun Song <songmuchun@bytedance.com>
Cc: glider@google.com, elver@google.com, dvyukov@google.com,
	jannh@google.com, sjpark@amazon.de, muchun.song@linux.dev,
	kasan-dev@googlegroups.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: kfence: fix handling discontiguous page
Date: Thu, 23 Mar 2023 15:18:50 -0700	[thread overview]
Message-ID: <20230323151850.e2785b1cff37fba078f26f2b@linux-foundation.org> (raw)
In-Reply-To: <20230323025003.94447-1-songmuchun@bytedance.com>

On Thu, 23 Mar 2023 10:50:03 +0800 Muchun Song <songmuchun@bytedance.com> wrote:

> The struct pages could be discontiguous when the kfence pool is allocated
> via alloc_contig_pages() with CONFIG_SPARSEMEM and !CONFIG_SPARSEMEM_VMEMMAP.
> So, the iteration should use nth_page().

What are the user-visible runtime effects of this flaw?

Thanks.

  parent reply	other threads:[~2023-03-23 22:18 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-23  2:50 [PATCH] mm: kfence: fix handling discontiguous page Muchun Song
2023-03-23  8:28 ` Marco Elver
2023-03-23 22:18 ` Andrew Morton [this message]
2023-03-24  1:59   ` Muchun Song
2023-03-24  3:43 ` Kefeng Wang

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