linux-kernel - Re: kernel panic: MAC Initialization failed. (3)

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Message-ID: <254a6393-a1ac-0627-ad02-3ee2819938ff@i-love.sakura.ne.jp>
Date:   Mon, 11 Mar 2019 22:45:55 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     casey@...aufler-ca.com, james.morris@...rosoft.com,
        jmorris@...ei.org, john.johansen@...onical.com,
        keescook@...omium.org, serge@...lyn.com, takedakn@...data.co.jp
Cc:     syzbot <syzbot+2ee3f8974c2e7dc69feb@...kaller.appspotmail.com>,
        linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: kernel panic: MAC Initialization failed. (3)

F.Y.I. Nothing is wrong with that commit. That commit merely allows enabling TOMOYO and
one of SELinux/Smack/AppArmor at the same time for syzbot's kernel command line options.
This problem will be handled by a patch at
https://lore.kernel.org/linux-security-module/1551362770-8655-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp/
and then updating syzbot to build kernels with this option enabled.

Well, it is wonderful that syzbot started bisecting. ;-)

On 2019/03/11 22:26, syzbot wrote:
> syzbot has bisected this bug to:
> 
> commit 89a9684ea158dd7eef1728be9f0aed9a7d41cf19
> Author: Kees Cook <keescook@...omium.org>
> Date:   Tue Feb 12 18:23:18 2019 +0000
> 
>     LSM: Ignore "security=" when "lsm=" is specified
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11572723200000
> start commit:   89a9684e LSM: Ignore "security=" when "lsm=" is specified
> git tree:       linux-next
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=13572723200000
> console output: https://syzkaller.appspot.com/x/log.txt?x=15572723200000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=c0f38652d28b522f
> dashboard link: https://syzkaller.appspot.com/bug?extid=2ee3f8974c2e7dc69feb
> userspace arch: amd64
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14c68242c00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17190c8ac00000
> 
> Reported-by: syzbot+2ee3f8974c2e7dc69feb@...kaller.appspotmail.com
> Fixes: 89a9684e ("LSM: Ignore "security=" when "lsm=" is specified")
>