linux-kernel - Re: possible deadlock in mon_bin_vma

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Message-ID: <0000000000002da08e0597c5efbd@google.com>
Date:   Wed, 20 Nov 2019 04:01:00 -0800
From:   syzbot <syzbot+56f9673bb4cdcbeb0e92@...kaller.appspotmail.com>
To:     arnd@...db.de, gregkh@...uxfoundation.org, jrdr.linux@...il.com,
        keescook@...omium.org, kstewart@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        viro@...iv.linux.org.uk, zaitcev@...hat.com
Subject: Re: possible deadlock in mon_bin_vma_fault

syzbot has bisected this bug to:

commit 46eb14a6e1585d99c1b9f58d0e7389082a5f466b
Author: Pete Zaitcev <zaitcev@...hat.com>
Date:   Mon Jan 8 21:46:41 2018 +0000

     USB: fix usbmon BUG trigger

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14deb012e00000
start commit:   58c3f14f Merge tag 'riscv-for-linus-4.19-rc2' of git://git..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=16deb012e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=12deb012e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=531a917630d2a492
dashboard link: https://syzkaller.appspot.com/bug?extid=56f9673bb4cdcbeb0e92
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13dca13e400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17cbe492400000

Reported-by: syzbot+56f9673bb4cdcbeb0e92@...kaller.appspotmail.com
Fixes: 46eb14a6e158 ("USB: fix usbmon BUG trigger")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection