IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready qtaguid: iface_stat: create6(lo): no inet dev ------------[ cut here ]------------ WARNING: CPU: 1 PID: 19334 at net/ipv4/af_inet.c:167 inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 19334 Comm: kworker/1:7 Not tainted 4.9.123-g7fa8c15 #80 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: sock_diag_events sock_diag_broadcast_destroy_work ffff8801c3e37a00 ffffffff81eb9689 ffffffff83c48ac0 00000000ffffffff 0000000000000000 0000000000000001 00000000000000a7 ffff8801c3e37ac0 ffffffff81423f75 0000000041b58ab3 ffffffff843bb880 ffffffff81423db6 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bf/0x3bc kernel/panic.c:179 [] __warn.cold.9+0xc1/0x17f kernel/panic.c:542 [] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [] inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167 [] l2tp_tunnel_destruct+0x339/0x590 net/l2tp/l2tp_core.c:1329 [] __sk_destruct+0x55/0x590 net/core/sock.c:1428 [] sk_destruct+0x63/0x80 net/core/sock.c:1463 [] sock_diag_broadcast_destroy_work+0x21a/0x390 net/core/sock_diag.c:154 [] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092 [] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..