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From: L A Walsh <lkml@tlinx.org>
To: Karel Zak <kzak@redhat.com>
Cc: util-linux@vger.kernel.org
Subject: Re: Bug: mount doing bad security check: only root can use -types, (effective EUID is 5013)
Date: Tue, 06 Jun 2017 08:11:31 -0700	[thread overview]
Message-ID: <5936C623.4030205@tlinx.org> (raw)
In-Reply-To: <5936B8E5.8050901@tlinx.org>

L A Walsh wrote:
>
>    But my EUID isn't 5013 ("LOGINUID" is). That's the complaint/bug.
---
FWIW, I display them in perl, and they also show 0/0:
 sudo bash -c 'perl -e "use P;P \"UID=$<, EUID=$>\""; /bin/mount devpts 
/tmp/mnt -t devpts'   
UID=0, EUID=0
mount: only root can use "--types" option (effective UID is 5013)

I.e. both bash & perl show UID/EUID being 0 before I call mount.
I don't get it.

I looked at mount's src-code, and have no idea why it's not
returning the right value.

  parent reply	other threads:[~2017-06-06 15:11 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-05 23:07 Bug: mount doing bad security check: only root can use -types, (effective EUID is 5013) L A Walsh
2017-06-06  9:36 ` Karel Zak
2017-06-06 14:15   ` L A Walsh
2017-06-06 15:10     ` Karel Zak
2017-06-06 15:11     ` L A Walsh [this message]
2017-06-06 15:21       ` Tilman Schmidt
2017-06-06 16:03         ` Karel Zak
2017-06-06 16:10         ` L A Walsh
2017-06-06 17:12           ` Patch: ensure mount & umount are root-owned before setting SUID bit L A Walsh
2017-06-20 11:14             ` Karel Zak

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