linux-kernel - Re: [RFC PATCH] x86/mm: Disable PTI for kernel_ident_mapping

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 for Android: free password hash cracker in your pocket

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

Message-ID: <efd1199c-b037-4e23-9982-7f466ec41720@intel.com>
Date: Tue, 26 Nov 2024 07:49:26 -0800
From: Dave Hansen <dave.hansen@...el.com>
To: David Woodhouse <dwmw2@...radead.org>, kexec@...ts.infradead.org,
 Schönherr, Jan H. <jschoenh@...zon.de>,
 Rik van Riel <riel@...riel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
 "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
 Kai Huang <kai.huang@...el.com>, Nikolay Borisov <nik.borisov@...e.com>,
 linux-kernel@...r.kernel.org, Simon Horman <horms@...nel.org>,
 Dave Young <dyoung@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
 jpoimboe@...nel.org, bsz@...zon.de
Subject: Re: [RFC PATCH] x86/mm: Disable PTI for kernel_ident_mapping_init()

On 11/26/24 03:42, David Woodhouse wrote:
> I threw this version together and it didn't immediately explode...

It's better than playing #define games. The damage is also pretty
limited and it helps us avoid plumbing a bit through the page table
handling function arguments.