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From: Alasdair G Kergon <agk@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] lvcreate from a setuid-root binary
Date: Thu, 15 Nov 2018 17:57:18 +0000	[thread overview]
Message-ID: <20181115175718.GE5291@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <e5147fd46fc8d3acf7eebac26a50852f@cs.uni-dortmund.de>

On Thu, Nov 15, 2018 at 05:39:56PM +0100, Christoph Pleger wrote:
> I am calling lvcreate from a setuid-binary, which internally calls  

Let's stop there.  The fact you're asking a question about setuid 
suggests you don't understand enough to be able to use it safely.

Seriously, never use setuid for anything until you have a thorough
understanding of its internals (userspace and kernel) and ld-linux,
capabilities, process contexts, acls, selinux etc.  It's just too easy
to make your system insecure because of something you didn't even
realise you had to consider!  (I could tell you some funny stories...)

Go back to the beginning and describe the original problem you are 
trying to solve and the constraints you have and ask for advice about
ways to achieve it.

Alasdair

  reply	other threads:[~2018-11-15 17:57 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-15 16:39 [linux-lvm] lvcreate from a setuid-root binary Christoph Pleger
2018-11-15 17:57 ` Alasdair G Kergon [this message]
2018-11-16 13:43   ` Christoph Pleger
2018-11-16 15:32     ` Zdenek Kabelac
2018-11-16 16:12       ` Christoph Pleger
2018-11-16 17:21         ` Roger Heflin
2018-11-16 15:41     ` Stuart D. Gathman
2018-11-21  9:56       ` Christoph Pleger
2018-11-21  9:58         ` Vladislav Bogdanov
2018-11-21 10:23           ` Christoph Pleger
2018-11-17  0:24     ` Alasdair G Kergon
2018-11-19  8:55       ` Christoph Pleger
2018-11-19 13:01         ` Alasdair G Kergon
2018-11-19 13:19     ` Bryn M. Reeves
2018-11-19 15:17       ` Christoph Pleger
2018-11-19 15:35 ` Christoph Pleger
     [not found] <1044845531.2858991.1542636286779.ref@mail.yahoo.com>
2018-11-19 14:04 ` matthew patton
2018-11-19 15:03   ` Christoph Pleger
     [not found] <1479542688.2901829.1542643514135.ref@mail.yahoo.com>
2018-11-19 16:05 ` matthew patton
     [not found] <1657965510.4711397.1542904883060.ref@mail.yahoo.com>
2018-11-22 16:41 ` matthew patton

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