linux-kernel - Re: [PATCH v2] prctl: Get private anonymous memory region name

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: <b2f4c084-47dc-4e92-a9e3-daec3f48425d@redhat.com>
Date:   Mon, 27 Nov 2023 15:52:42 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Oleg Nesterov <oleg@...hat.com>, Rong Tao <rtoax@...mail.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Kees Cook <keescook@...omium.org>,
        Florent Revest <revest@...omium.org>,
        Josh Triplett <josh@...htriplett.org>,
        Andy Chiu <andy.chiu@...ive.com>,
        Joey Gouly <joey.gouly@....com>,
        Stefan Roesch <shr@...kernel.io>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ondrej Mosnacek <omosnace@...hat.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>,
        open list <linux-kernel@...r.kernel.org>, rongtao@...tc.cn
Subject: Re: [PATCH v2] prctl: Get private anonymous memory region name

On 26.11.23 14:56, Oleg Nesterov wrote:
> On 11/26, Rong Tao wrote:
>>
>> then the PR_GET_VMA interface should be provided accordingly,
>> which is necessary, as the userspace program usually wants to know what
>> VMA name it has configured for the anonymous page.
> 
> I don't really understand the use-case for PR_GET_VMA ...
> 

Can't we simply read "/proc/PID/maps" and just have that information 
from there?

Also, I don't understand the exact use case, that should be clarified -- 
especially, why the existing way is insufficient.

-- 
Cheers,

David / dhildenb