linux-hardening - Re: [PATCH v3 3/3] mm/usercopy: Detect compound page overruns

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: <202112131249.0D2A4A2C7@keescook>
Date:   Mon, 13 Dec 2021 12:52:22 -0800
From:   Kees Cook <keescook@...omium.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     linux-mm@...ck.org, Thomas Gleixner <tglx@...utronix.de>,
        linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3 3/3] mm/usercopy: Detect compound page overruns

On Mon, Dec 13, 2021 at 02:27:03PM +0000, Matthew Wilcox (Oracle) wrote:
> Move the compound page overrun detection out of
> CONFIG_HARDENED_USERCOPY_PAGESPAN so it's enabled for more people.

I'd argue that everything else enabled by USERCOPY_PAGESPAN could be
removed now too. Do you want to add a 4th patch to rip that out?

https://github.com/KSPP/linux/issues/163

Thanks!

-Kees

-- 
Kees Cook