linux-kernel - Re: [PATCH v2] vmap(): don't allow invalid pages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220125182550.7c693c76fe6520047c2e4f26@linux-foundation.org>
Date:   Tue, 25 Jan 2022 18:25:50 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Yury Norov <yury.norov@...il.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Ding Tianhong <dingtianhong@...wei.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Matthew Wilcox <willy@...radead.org>,
        Alexey Klimov <aklimov@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH v2] vmap(): don't allow invalid pages

On Tue, 18 Jan 2022 17:21:09 -0800 Yury Norov <yury.norov@...il.com> wrote:

> vmap() takes struct page *pages as one of arguments, and user may provide
> an invalid pointer which would lead to data abort at address translation
> later.

Does "user" mean userspace code?

If so, please tell us much more about the means by which userspace can
trigger this problem.