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

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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