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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5679C589.1060102@oracle.com>
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/