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From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: James Morris <jmorris@namei.org>
Cc: linux-security-module@vger.kernel.org,
	Dmitry Vyukov <dvyukov@google.com>,
	syzbot <syzbot+29569ed06425fcf67a95@syzkaller.appspotmail.com>,
	syzbot <syzbot+e1b8084e532b6ee7afab@syzkaller.appspotmail.com>
Subject: Re: [PATCH] tomoyo: Add a kernel config option for fuzzing testing.
Date: Wed, 13 Mar 2019 05:56:30 +0900
Message-ID: <5b69c819-eed4-1825-9e67-fff1206e9e3f@i-love.sakura.ne.jp> (raw)
In-Reply-To: <alpine.LRH.2.21.1903130519440.27366@namei.org>

On 2019/03/13 3:21, James Morris wrote:
> On Thu, 28 Feb 2019, Tetsuo Handa wrote:
> 
>> syzbot is reporting kernel panic triggered by memory allocation fault
>> injection before loading TOMOYO's policy [1]. To make the fuzzing tests
>> useful, we need to assign a profile other than "disabled" (no-op) mode.
>> Therefore, let's allow syzbot to load TOMOYO's built-in policy for
>> "learning" mode using a kernel config option. This option must not be
>> enabled for kernels built for production system, for this option also
>> disables domain/program checks when modifying policy configuration via
>> /sys/kernel/security/tomoyo/ interface.
> 
> I don't understand the logic here. If the cause of this is no policy 
> loaded combined with running out of memory, shouldn't the no-policy issue 
> be dealt with earlier?
> 

This patch is for automatically loading minimal policy at boot time
in order to address the no-policy issue. By applying this patch, syzbot
can test TOMOYO module without modifying userspace to load TOMOYO's policy
when /sbin/init starts.

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-28 14:06 Tetsuo Handa
2019-03-04 13:35 ` Tetsuo Handa
2019-03-04 14:34   ` Stephen Smalley
2019-03-04 23:59     ` Tetsuo Handa
2019-03-05  3:32       ` James Morris
2019-03-11 13:18         ` Tetsuo Handa
2019-03-12 17:19           ` James Morris
2019-03-12 21:15             ` Tetsuo Handa
2019-03-12 21:19               ` James Morris
2019-03-12 21:56               ` Edwin Zimmerman
2019-03-13 20:00                 ` James Morris
2019-03-12 18:21 ` James Morris
2019-03-12 20:56   ` Tetsuo Handa [this message]
2019-03-12 21:24     ` James Morris
2019-03-13 10:29       ` Tetsuo Handa
2019-03-13 13:17         ` Paul Moore
2019-03-25 21:09           ` Tetsuo Handa

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