linux-kernel - Re: WARNING in cgroup_rstat

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Date:   Wed, 14 Aug 2019 18:26:01 -0700
From:   syzbot <syzbot+370e4739fa489334a4ef@...kaller.appspotmail.com>
To:     ast@...nel.org, daniel@...earbox.net, hdanton@...a.com,
        john.fastabend@...il.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: WARNING in cgroup_rstat_updated

syzbot has bisected this bug to:

commit e9db4ef6bf4ca9894bb324c76e01b8f1a16b2650
Author: John Fastabend <john.fastabend@...il.com>
Date:   Sat Jun 30 13:17:47 2018 +0000

     bpf: sockhash fix omitted bucket lock in sock_close

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=143286e2600000
start commit:   31cc088a Merge tag 'drm-next-2019-07-19' of git://anongit...
git tree:       net-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=163286e2600000
console output: https://syzkaller.appspot.com/x/log.txt?x=123286e2600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4dba67bf8b8c9ad7
dashboard link: https://syzkaller.appspot.com/bug?extid=370e4739fa489334a4ef
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16dd57dc600000

Reported-by: syzbot+370e4739fa489334a4ef@...kaller.appspotmail.com
Fixes: e9db4ef6bf4c ("bpf: sockhash fix omitted bucket lock in sock_close")

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