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

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Message-ID: <20200625100429.GB2571@kadam>
Date:   Thu, 25 Jun 2020 13:04:29 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Christian Kujau <lists@...dbynature.de>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Willy Tarreau <w@....eu>, linux-kernel@...r.kernel.org
Subject: Re: process '/usr/bin/rsync' started with executable stack

On Wed, Jun 24, 2020 at 12:39:24PM -0700, Kees Cook wrote:
> On Wed, Jun 24, 2020 at 07:51:48PM +0300, Dan Carpenter wrote:
> > In Debian testing the initrd triggers the warning.
> > 
> > [   34.529809] process '/usr/bin/fstype' started with executable stack
> 
> Where does fstype come from there? I am going to guess it is either
> busybox or linked against klibc?
> 
> klibc has known problems with executable stacks due to its trampoline
> implementation:
> https://wiki.ubuntu.com/SecurityTeam/Roadmap/ExecutableStacks

Yeah.  It comes from klibc-utils.

regards,
dan carpenter