linux-kernel - Re: possible deadlock in __do_page

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Date:   Tue, 04 Jun 2019 16:08:45 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     syzbot <syzbot+606e524a3ca9617cf8c0@...kaller.appspotmail.com>,
        adilger.kernel@...ger.ca, hdanton@...a.com, jmorris@...ei.org,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org, serge@...lyn.com,
        syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: possible deadlock in __do_page_fault (2)

On Mon, 2019-06-03 at 15:04 -0700, syzbot wrote:
> syzbot has bisected this bug to:
> 
> commit 69d61f577d147b396be0991b2ac6f65057f7d445
> Author: Mimi Zohar <zohar@...ux.ibm.com>
> Date:   Wed Apr 3 21:47:46 2019 +0000
> 
>      ima: verify mprotect change is consistent with mmap policy
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16461c5aa00000
> start commit:   3c09c195 Add linux-next specific files for 20190531
> git tree:       linux-next
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=15461c5aa00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=11461c5aa00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6cfb24468280cd5c
> dashboard link: https://syzkaller.appspot.com/bug?extid=606e524a3ca9617cf8c0
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10572ca6a00000
> 
> Reported-by: syzbot+606e524a3ca9617cf8c0@...kaller.appspotmail.com
> Fixes: 69d61f577d14 ("ima: verify mprotect change is consistent with mmap  
> policy")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Thank you for the report.

Mimi