Re: INFO: task hung in ctrl_getfamily

[syzbot]

syzbot has bisected this bug to:

commit 928df1880e24bcd47d6359ff86df24db3dfba3c3
Author: Jon Maloy <jon.maloy@xxxxxxxxxxxx>
Date:   Thu Mar 15 15:48:51 2018 +0000

    tipc: obsolete TIPC_ZONE_SCOPE

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1377ec7d200000
start commit:   40e020c1 Linux 4.20-rc6
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=10f7ec7d200000
console output: https://syzkaller.appspot.com/x/log.txt?x=1777ec7d200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c8970c89a0efbb23
dashboard link: https://syzkaller.appspot.com/bug?extid=36edb5cac286af8e3385
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14f04d6d400000

Reported-by: syzbot+36edb5cac286af8e3385@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 928df1880e24 ("tipc: obsolete TIPC_ZONE_SCOPE")

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