linux-kernel - Re: Fwd: Started to get "memfd_create() without MFD_EXEC nor MFD_NOEXEC

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: <74b8e4c0-a557-b047-4507-c243c9aad216@gmail.com>
Date:   Fri, 2 Jun 2023 09:15:25 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Kees Cook <keescook@...omium.org>, Vlastimil Babka <vbabka@...e.cz>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Jeff Xu <jeffxu@...gle.com>,
        Daniel Verkamp <dverkamp@...omium.org>,
        David Herrmann <dh.herrmann@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Hugh Dickins <hughd@...gle.com>, Jann Horn <jannh@...gle.com>,
        Jorge Lucangeli Obes <jorgelo@...omium.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stuart Foster <smf-linux@...ginmedia.com>
Subject: Re: Fwd: Started to get "memfd_create() without MFD_EXEC nor
 MFD_NOEXEC_SEAL"

On 6/1/23 21:12, Kees Cook wrote:
>> Hm indeed it seems to have introduced 2 new flags and immediately warn if
>> any process doesn't use them. Maybe it would make sense for some of the
>> non-default values of vm.memfd_noexec, but it's too early to warn
>> unconditionally everywhere, no?
> 
> This is pretty standard for getting new options like this noticed by
> userspace -- there is no regression in _behavior_. It's just a reminder
> to fix userspace code.
> 

Telling regzbot:

#regzbot invalid: not a kernel regression, but userspace fix is needed

Thanks.

-- 
An old man doll... just what I always wanted! - Clara