linux-kernel - Re: INFO: rcu detected stall in ip_set

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Date:   Fri, 24 Jan 2020 21:17:02 -0800
From:   syzbot <syzbot+c27b8d5010f45c666ed1@...kaller.appspotmail.com>
To:     bp@...en8.de, coreteam@...filter.org, davem@...emloft.net,
        fw@...len.de, hpa@...or.com, info@...ux.net, jeremy@...zel.net,
        kadlec@...ckhole.kfki.hu, kadlec@...filter.org,
        kstewart@...uxfoundation.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, pablo@...filter.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de, x86@...nel.org
Subject: Re: INFO: rcu detected stall in ip_set_udel

syzbot has bisected this bug to:

commit 23c42a403a9cfdbad6004a556c927be7dd61a8ee
Author: Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Date:   Sat Oct 27 13:07:40 2018 +0000

    netfilter: ipset: Introduction of new commands and protocol version 7

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1352c611e00000
start commit:   4703d911 Merge tag 'xarray-5.5' of git://git.infradead.org..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=10d2c611e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1752c611e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=83c00afca9cf5153
dashboard link: https://syzkaller.appspot.com/bug?extid=c27b8d5010f45c666ed1
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1568f9c9e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17db3611e00000

Reported-by: syzbot+c27b8d5010f45c666ed1@...kaller.appspotmail.com
Fixes: 23c42a403a9c ("netfilter: ipset: Introduction of new commands and protocol version 7")

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