linux-kernel - Re: process '/usr/bin/rsync' started with executable stack

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Message-ID: <alpine.DEB.2.22.1.446.2006232231410.3892@trent.utfs.org>
Date:   Tue, 23 Jun 2020 22:34:57 -0700 (PDT)
From:   Christian Kujau <lists@...dbynature.de>
To:     Kees Cook <keescook@...omium.org>
cc:     Alexey Dobriyan <adobriyan@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Willy Tarreau <w@....eu>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-kernel@...r.kernel.org
Subject: Re: process '/usr/bin/rsync' started with executable stack

On Tue, 23 Jun 2020, Kees Cook wrote:
> > If you run something with exec stack after the message
> > you shouldn't get it second time.
> 
> If you want to reset this flag, you can do:
>  # echo 1 > /sys/kernel/debug/clear_warn_once

Thanks. Although, I tend to not mount /sys/kernel/{config,debug,tracing} 
and other things, I always thought they are not needed and could maybe 
lower the attack surface if not mounted. Or maybe my tinfoil hat needs 
some adjustment...

Christian.
-- 
BOFH excuse #279:

The static electricity routing is acting up...