[11460] in bugtraq
Re: vlock + magic SysRQ key
daemon@ATHENA.MIT.EDU (Tim Fletcher)
Sat Aug 21 06:27:55 1999
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Message-Id: <Pine.LNX.4.10.9908142206330.8584-100000@night-shade.parrswood.org>
Date: Fri, 20 Aug 1999 01:42:35 +0100
Reply-To: Tim Fletcher <tim@NIGHT-SHADE.DEMON.CO.UK>
From: Tim Fletcher <tim@NIGHT-SHADE.DEMON.CO.UK>
X-To: "Dmitry Yu. Bolkhovityanov" <D.Yu.Bolkhovityanov@INP.NSK.SU>
To: BUGTRAQ@SECURITYFOCUS.COM
In-Reply-To: <7C5CD4B49A6@csd.inp.nsk.su>
Following an email exchange with the Slackware maintainer Patrick J.
Volkerding <volkerdi@slackware.com> he put the Magic SysRq in all the
prebuilt kernels shipped with slackware 4.0. I guess this was a bad idea
on my part.
I would still like to see Magic SysRq in install disk kernels as it helps
to debug installs that die.
Also I note from the 2.2.11 changelog that Magic SysRq can be runtime
enabled / disabled
Thou the kernel src tree from Slackware 4.0 is pristene 2.2.6, so any home
make kernels will have the SysRq turned off by default
<Snip>
> CONFIG_MAGIC_SYSRQ is enabled by default in the 2.2.5 kernel which is
> shipped with RedHat-6.0:
>
> viper:/usr/src/linux-2.2.5% grep SYSRQ arch/i386/defconfig .config
> arch/i386/defconfig:CONFIG_MAGIC_SYSRQ=y
> .config:CONFIG_MAGIC_SYSRQ=y
> viper:/usr/src/linux-2.2.5% uname -a
> Linux some.inet.address 2.2.5-15 #1 Mon Apr 19 22:21:09 EDT 1999 i586 unknown
>
> In 2.2.5-22 kernel (the last version in updates/) arch/i386/defconfig has
> CONFIG_MAGIC_SYSRQ also enabled.
>
> The most interesting is that standard kernel distribution
> (linux-2.2.5.tar.gz) doesn't have SYSRQ enabled -- it was set to "y" by
> RedHat (probably during beta-testing), and is "y" for all architectures.
>
> So, those who use RedHat don't even have to say "Y" and decide if they
> are hackers or not -- the decision was made for them beforehand ;-).
--
Tim Fletcher .~.
/V\ L I N U X
tjdf@st-andrews.ac.uk // \ >Don't fear the penguin<
tim@night-shade.demon.co.uk /( )\
^^-^^
Organic chemistry is the chemistry of carbon compounds. Biochemistry
is the study of carbon compounds that crawl.
-- Mike Adams
