linux-kernel - Re: possible deadlock in acct_pin

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Date:   Tue, 26 Mar 2019 20:53:01 -0700
From:   syzbot <syzbot+2a73a6ea9507b7112141@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, gregkh@...uxfoundation.org,
        kstewart@...uxfoundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, mark.rutland@....com,
        mszeredi@...hat.com, oleg@...hat.com, paulmck@...ux.vnet.ibm.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        viro@...iv.linux.org.uk
Subject: Re: possible deadlock in acct_pin_kill

syzbot has bisected this bug to:

commit e950564b97fd0f541b02eb207685d0746f5ecf29
Author: Miklos Szeredi <mszeredi@...hat.com>
Date:   Tue Jul 24 13:01:55 2018 +0000

     vfs: don't evict uninitialized inode

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12123143200000
start commit:   da5322e6 Merge tag 'selinux-pr-20181115' of git://git.kern..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=11123143200000
console output: https://syzkaller.appspot.com/x/log.txt?x=16123143200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d86f24333880b605
dashboard link: https://syzkaller.appspot.com/bug?extid=2a73a6ea9507b7112141
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12298533400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17ff545d400000

Reported-by: syzbot+2a73a6ea9507b7112141@...kaller.appspotmail.com
Fixes: e950564b97fd ("vfs: don't evict uninitialized inode")

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