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Subject: Re: [PATCHv2] x86/mm: set x32 syscall bit in SET_PERSONALITY()
References: <20170321163712.20334-1-dsafonov@virtuozzo.com>
 <20170321171723.GB21564@uranus.lan>
 <CALCETrXoxRBTon8+jrYcbruYVUZASwgd-kzH-A96DGvT7gLXVA@mail.gmail.com>
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 <dfdb16d4-aa6e-8635-1ea5-f6ac57b1dd05@virtuozzo.com>
 <20170321192419.GF21564@uranus.lan>
From: Dmitry Safonov <dsafonov@virtuozzo.com>
Message-ID: <b2e73f20-0b0c-477f-0328-dec8d63a1b48@virtuozzo.com>
Date: Tue, 21 Mar 2017 22:34:57 +0300
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Sender: owner-linux-mm@kvack.org
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To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Andy Lutomirski <luto@amacapital.net>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Dmitry Safonov <0x7f454c46@gmail.com>, Adam Borowski <kilobyte@angband.pl>, "linux-mm@kvack.org" <linux-mm@kvack.org>, Andrei Vagin <avagin@gmail.com>, Borislav Petkov <bp@suse.de>, "Kirill A.
 Shutemov" <kirill.shutemov@linux.intel.com>, X86 ML <x86@kernel.org>, "H.
 Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@redhat.com>, Thomas Gleixner <tglx@linutronix.de>

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

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