From: Borislav Petkov <bp@alien8.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Franck Bui" <fbui@suse.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Ingo Molnar" <mingo@kernel.org>,
"Linus Torvalds" <torvalds@linux-foundation.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Subject: Re: [PATCH -v3.1 2/2] printk: Add kernel parameter to control writes to /dev/kmsg
Date: Wed, 6 Jul 2016 20:32:45 +0200 [thread overview]
Message-ID: <20160706183245.GJ7300@pd.tnic> (raw)
In-Reply-To: <20160706135211.3e4f968e@gandalf.local.home>
On Wed, Jul 06, 2016 at 01:52:11PM -0400, Steven Rostedt wrote:
> Hmm, this does nothing to stop user space from doing the following:
>
> while :; do echo '5,0,0,-;hello' > /dev/kmsg; done
I wouldn't worry too much if /dev/kmsg has root:root perms elsewhere
too, like it is the case in my guest here:
crw-r--r-- 1 root root 1, 11 Jul 6 22:28 /dev/kmsg
root can shoot herself in the foot in countless ways anyway.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
prev parent reply other threads:[~2016-07-06 18:33 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-04 14:24 [PATCH -v3 0/2] printk.devkmsg: Ratelimit it by default Borislav Petkov
2016-07-04 14:24 ` [PATCH -v3 1/2] ratelimit: Extend to print suppressed messages on release Borislav Petkov
2016-07-05 18:26 ` Steven Rostedt
2016-07-05 18:45 ` Borislav Petkov
2016-07-05 18:57 ` Steven Rostedt
2016-07-05 19:42 ` Borislav Petkov
2016-07-05 19:49 ` Steven Rostedt
2016-07-05 20:08 ` Joe Perches
2016-07-05 20:53 ` Christian Borntraeger
2016-07-05 21:14 ` Paolo Bonzini
2016-07-05 21:23 ` Christian Borntraeger
2016-07-05 21:31 ` Borislav Petkov
2016-07-06 13:28 ` [PATCH -v3.1 " Borislav Petkov
2016-07-06 13:40 ` Steven Rostedt
2016-07-06 14:59 ` [PATCH -v3.2 " Borislav Petkov
2016-07-07 1:17 ` Steven Rostedt
2016-07-07 5:36 ` Borislav Petkov
2016-07-06 14:50 ` [PATCH -v3.1 " Joe Perches
2016-07-04 14:24 ` [PATCH -v3 2/2] printk: Add kernel parameter to control writes to /dev/kmsg Borislav Petkov
2016-07-05 21:47 ` Steven Rostedt
2016-07-05 22:02 ` Borislav Petkov
2016-07-05 22:08 ` Steven Rostedt
2016-07-06 13:29 ` [PATCH -v3.1 " Borislav Petkov
2016-07-06 17:52 ` Steven Rostedt
2016-07-06 18:32 ` Borislav Petkov [this message]
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