From: Matthew Wilcox <willy@infradead.org>
To: "Russell King (Oracle)" <linux@armlinux.org.uk>
Cc: Robin Murphy <robin.murphy@arm.com>,
Yury Norov <yury.norov@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Nicholas Piggin <npiggin@gmail.com>,
Ding Tianhong <dingtianhong@huawei.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Alexey Klimov <aklimov@redhat.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] vmap(): don't allow invalid pages
Date: Thu, 20 Jan 2022 19:04:26 +0000 [thread overview]
Message-ID: <YemyOsvx9+dFkICP@casper.infradead.org> (raw)
In-Reply-To: <YemTq/yGkHQ+grd1@shell.armlinux.org.uk>
On Thu, Jan 20, 2022 at 04:54:03PM +0000, Russell King (Oracle) wrote:
> Well, I think I've adequately explained why I believe:
>
> pfn_is_valid(page_to_pfn(page))
>
> being used as the primary check is substandard, and will likely lead to
> a future CVE. When generating an array of struct page's, I believe that
> it is the responsibility for the generator to ensure that the array
> only contains valid pages.
So you're saying that virt_to_page() should be made more expensive?
next prev parent reply other threads:[~2022-01-20 19:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-18 23:52 Yury Norov
2022-01-19 0:51 ` Matthew Wilcox
2022-01-19 6:17 ` Anshuman Khandual
2022-01-19 17:22 ` Yury Norov
2022-01-20 3:37 ` Anshuman Khandual
2022-01-20 4:27 ` Matthew Wilcox
2022-01-21 2:56 ` Yury Norov
2022-01-19 11:16 ` Mark Rutland
2022-01-19 17:00 ` Yury Norov
2022-01-19 18:06 ` Mark Rutland
2022-01-19 13:28 ` Robin Murphy
2022-01-19 16:27 ` Matthew Wilcox
2022-01-19 17:54 ` Russell King (Oracle)
2022-01-19 18:01 ` Matthew Wilcox
2022-01-19 18:57 ` Russell King (Oracle)
2022-01-19 19:35 ` Matthew Wilcox
2022-01-19 22:38 ` Russell King (Oracle)
2022-01-19 18:43 ` Robin Murphy
2022-01-19 19:12 ` Russell King (Oracle)
2022-01-20 12:22 ` Robin Murphy
2022-01-20 13:03 ` Russell King (Oracle)
2022-01-20 16:37 ` Robin Murphy
2022-01-20 16:54 ` Russell King (Oracle)
2022-01-20 19:04 ` Matthew Wilcox [this message]
2022-01-21 5:26 ` Yury Norov
2022-01-26 2:50 ` Matthew Wilcox
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