linux-kernel - Re: [PATCH RFC 0/3] drivers/char: remove /dev/kmem for good

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Message-ID: <be3e8470-a8a4-2111-5c5e-7a03c1f9ed16@redhat.com>
Date:   Mon, 22 Mar 2021 11:08:47 +0100
From:   David Hildenbrand <david@...hat.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        "Alexander A. Klimov" <grandmaster@...klimov.de>,
        Alexander Viro <viro@...iv.linux.org.uk>,
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        Andrew Morton <akpm@...ux-foundation.org>,
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        Yoshinori Sato <ysato@...rs.sourceforge.jp>
Subject: Re: [PATCH RFC 0/3] drivers/char: remove /dev/kmem for good

On 19.03.21 19:10, Steven Rostedt wrote:
> On Fri, 19 Mar 2021 15:34:49 +0100
> David Hildenbrand <david@...hat.com> wrote:
> 
>> Let's start a discussion if /dev/kmem is worth keeping around and
>> fixing/maintaining or if we should just remove it now for good.
> 
> The last time I used /dev/kmem was in 2003. While in Germany, my home
> firewall (in the US) got rooted. I could ssh into the box but had no way to
> shut it down because the rootkit took over all those commands (luckily it
> still allowed me to become root). I finally killed the box with:
> 
>   # ls -lR / > /dev/kmem
> 
>   ;-)


Wonder if "echo c > /proc/sysrq-trigger" already existed and would have 
worked back then. :)


-- 
Thanks,

David / dhildenb