linux-kernel - Re: race in audit_log_untrusted_string for task

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Date:	Mon, 17 Mar 2014 09:01:45 -0400
From:	Steve Grubb <sgrubb@...hat.com>
To:	Richard Guy Briggs <rgb@...hat.com>
Cc:	linux-audit@...hat.com, LKML <linux-kernel@...r.kernel.org>,
	Eric Paris <eparis@...hat.com>
Subject: Re: race in audit_log_untrusted_string for task_struct::comm

On Saturday, March 15, 2014 07:28:46 PM Richard Guy Briggs wrote:
> I'm inclined to go get_task_comm() in all 5 locations, but if we care
> more about locking overhead, I'll switch to memcpy().
> 
> Steve, do we care about the integrity of the comm field?

In the case of interpreters, its about the only thing we know about the 
application being executed. For example, a shell script will have exe=/bin/sh, 
so comm= is our only clue.

-Steve
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