From: Karel Zak <kzak@redhat.com>
To: Peter Cordes <peter@cordes.ca>
Cc: halfdog <me@halfdog.net>, util-linux@vger.kernel.org
Subject: Re: util-linux mount/unmount ASLR bypass via environment variable
Date: Fri, 12 Jan 2018 13:47:23 +0100 [thread overview]
Message-ID: <20180112124723.mduisaaklkxcmddu@ws.net.home> (raw)
In-Reply-To: <20180112115000.GF29852@cordes.ca>
On Fri, Jan 12, 2018 at 07:50:00AM -0400, Peter Cordes wrote:
> On Fri, Jan 12, 2018 at 11:15:59AM +0100, Karel Zak wrote:
> > Good point. Fixed, now for SUIDs it's without the addresses:
> >
> > $ LIBMOUNT_DEBUG=all mount
> > 18622: libmount: CXT: ----> allocate [RESTRICTED]
> > 18622: libmount: TAB: alloc
> > ...
>
> Would it be useful to warn that addresses are being hidden? People
> might not realize they're missing out on that when debugging.
OK.
# LIBMOUNT_DEBUG=all ./mount.static
14676: libmount: don't print memory addresses (SUID executable).
14676: libmount: INIT: library debug mask: 0x100ffff
14676: libmount: INIT: library version: 2.31.188
14676: libmount: INIT: feature: btrfs
14676: libmount: INIT: feature: assert
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
prev parent reply other threads:[~2018-01-12 12:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-11 18:51 util-linux mount/unmount ASLR bypass via environment variable halfdog
2018-01-12 10:15 ` Karel Zak
2018-01-12 11:50 ` Peter Cordes
2018-01-12 12:47 ` Karel Zak [this message]
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