linux-kernel - Re: [PATCH 0/9] Refactoring exit

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]

Date:   Mon, 28 Jun 2021 10:59:51 +1200
From:   Michael Schmitz <schmitzmic@...il.com>
To:     Al Viro <viro@...iv.linux.org.uk>,
        "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Jens Axboe <axboe@...nel.dk>, Oleg Nesterov <oleg@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        alpha <linux-alpha@...r.kernel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Arnd Bergmann <arnd@...nel.org>, Tejun Heo <tj@...nel.org>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH 0/9] Refactoring exit

On 28/06/21 10:13 am, Al Viro wrote:

> On Thu, Jun 24, 2021 at 10:45:23PM +0000, Al Viro wrote:
>
>> 13) there's bdflush(1, whatever), which is equivalent to exit(0).
>> IMO it's long past the time to simply remove the sucker.
> Incidentally, calling that from ptraced process on alpha leads to
> the same headache for tracer.  _If_ we leave it around, this is
> another candidate for "hit yourself with that special signal" -
> both alpha and m68k have that syscall, and IMO adding an asm
> wrapper for that one is over the top.
>
> Said that, we really ought to bury that thing:
>
> commit 2f268ee88abb33968501a44368db55c63adaad40
> Author: Andrew Morton <akpm@...eo.com>
> Date:   Sat Dec 14 03:16:29 2002 -0800
>
>      [PATCH] deprecate use of bdflush()
> 	
>      Patch from Robert Love <rml@...h9.net>
> 		
>      We can never get rid of it if we do not deprecate it - so do so and
>      print a stern warning to those who still run bdflush daemons.
>
> Deprecated for 18.5 years by now - I seriously suspect that we have
> some contributors younger than that...

Haven't found that warning in over 7 years' worth of console logs, and 
I'm a good candidate for running the oldest userland in existence for m68k.

Time to let it go.

Cheers,

     Michael