linux-kernel - Re: [PATCH] IMA: policy can be updated zero times

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Date:	Tue, 22 Dec 2015 16:50:01 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Petko Manolov <petkan@...-labs.com>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:	dmitry.kasatkin@...il.com, james.l.morris@...cle.com,
	serge@...lyn.com, linux-ima-devel@...ts.sourceforge.net,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] IMA: policy can be updated zero times

On 12/22/2015 04:40 PM, Petko Manolov wrote:
>> Thanks, Sasha.  By the time ima_update_policy() is called
>> >ima_release_policy() has already output the policy update status
>> >message.  I guess an empty policy could be considered a valid policy.
>> >Could you add a msg indicating that the new policy was empty?
> 
> As far as I can say we can't get to ima_update_policy() with empty ima_temp_rules because ima_write_policy() will set valid_policy to 0 in case of an empty rule.  I'll double check it tomorrow, but please you do that too.

This is based on an actual crash rather than code analysis.


Thanks,
Sasha
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