linux-kernel - Re: possible deadlock in sch_direct

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Date:   Sat, 30 Nov 2019 13:04:01 -0800
From:   syzbot <syzbot+29cc278357da941e304e@...kaller.appspotmail.com>
To:     davem@...emloft.net, jhs@...atatu.com, jiri@...nulli.us,
        kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org,
        lucien.xin@...il.com, netdev@...r.kernel.org, pabeni@...hat.com,
        syzkaller-bugs@...glegroups.com, xiyou.wangcong@...il.com,
        yoshfuji@...ux-ipv6.org
Subject: Re: possible deadlock in sch_direct_xmit

syzbot has bisected this bug to:

commit c84bed440e4e11a973e8c0254d0dfaccfca41fb0
Author: Xin Long <lucien.xin@...il.com>
Date:   Sun Oct 1 14:00:56 2017 +0000

     ip_gre: erspan device should keep dst

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=153a767ee00000
start commit:   c92a9a46
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=173a767ee00000
console output: https://syzkaller.appspot.com/x/log.txt?x=133a767ee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=46986c099cb53bc6
dashboard link: https://syzkaller.appspot.com/bug?extid=29cc278357da941e304e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=143636c9800000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16856849800000

Reported-by: syzbot+29cc278357da941e304e@...kaller.appspotmail.com
Fixes: c84bed440e4e ("ip_gre: erspan device should keep dst")

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