syzbot has bisected this issue to:

commit 489b30b53f0540b9f8e391cbb2839cea48b5d1c1 Author: Kirill Tkhai ktkhai@virtuozzo.com Date: Thu Mar 15 09:10:57 2018 +0000

net: Convert l2tp_net_ops

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=175b598f900000 start commit: fcadab74 Merge tag 'drm-fixes-2020-10-01-1' of git://anong.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=14db598f900000 console output: https://syzkaller.appspot.com/x/log.txt?x=10db598f900000 kernel config: https://syzkaller.appspot.com/x/.config?x=89ab6a0c48f30b49 dashboard link: https://syzkaller.appspot.com/bug?extid=4cf3e4e092f2f4120a52 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=145eb667900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15422c1f900000

Reported-by: syzbot+4cf3e4e092f2f4120a52@syzkaller.appspotmail.com Fixes: 489b30b53f05 ("net: Convert l2tp_net_ops")

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