linux-kernel - Re: [PATCHv2] x86/mm: set x32 syscall bit in SET

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: <b2e73f20-0b0c-477f-0328-dec8d63a1b48@virtuozzo.com>
Date:   Tue, 21 Mar 2017 22:34:57 +0300
From:   Dmitry Safonov <dsafonov@...tuozzo.com>
To:     Cyrill Gorcunov <gorcunov@...il.com>
CC:     Andy Lutomirski <luto@...capital.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        "Adam Borowski" <kilobyte@...band.pl>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andrei Vagin <avagin@...il.com>, Borislav Petkov <bp@...e.de>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCHv2] x86/mm: set x32 syscall bit in SET_PERSONALITY()

On 03/21/2017 10:24 PM, Cyrill Gorcunov wrote:
> On Tue, Mar 21, 2017 at 10:19:01PM +0300, Dmitry Safonov wrote:
>>>
>>> indeed, thanks!
>>
>> Also, even more simple-minded: for now we could just check binary magic
>> from /proc/.../exe, for now stopping on x32 binaries.
>
> File may not exist and elfheader wiped out as well.

Yep, not very reliable.

-- 
              Dmitry