Re: BUG: spinlock bad magic in rhashtable_walk_enter

[syzbot]

syzbot has bisected this bug to:

commit 7e27e8d6130c5e88fac9ddec4249f7f2337fe7f8
Author: Junwei Hu <hujunwei4@xxxxxxxxxx>
Date:   Thu May 16 02:51:15 2019 +0000

    tipc: switch order of device registration to fix a crash

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17c22c72a00000
start commit:   510e2ced ipv6: fix src addr routing with the exception table
git tree:       net
final crash:    https://syzkaller.appspot.com/x/report.txt?x=14222c72a00000
console output: https://syzkaller.appspot.com/x/log.txt?x=10222c72a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=82f0809e8f0a8c87
dashboard link: https://syzkaller.appspot.com/bug?extid=01dd5c4b3c34a5cf9308
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16b6373ca00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1251e73ca00000

Reported-by: syzbot+01dd5c4b3c34a5cf9308@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 7e27e8d6130c ("tipc: switch order of device registration to fix a  
crash")

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