------------[ cut here ]------------ WARNING: CPU: 0 PID: 8701 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: 0 PID: 8701 Comm: kworker/0:0 Not tainted 4.4.150-g5541782 #83 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: sock_diag_events sock_diag_broadcast_destroy_work 0000000000000000 c17b2413734e16ce ffff88009402fa30 ffffffff81e14e2d ffffffff83a44e40 ffff8800b59db000 ffffffff83f13300 0000000000000009 00000000000000a7 ffff88009402faf0 ffffffff8140d3c4 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] panic+0x19e/0x38d kernel/panic.c:112 [] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455 [] warn_slowpath_null+0x29/0x30 kernel/panic.c:492 [] inet_sock_destruct+0x598/0x760 net/ipv4/af_inet.c:167 [] l2tp_tunnel_destruct+0x33e/0x590 net/l2tp/l2tp_core.c:1235 [] sk_destruct+0x4c/0x4c0 net/core/sock.c:1447 [] sock_diag_broadcast_destroy_work+0x21a/0x390 net/core/sock_diag.c:153 [] process_one_work+0x7df/0x1600 kernel/workqueue.c:2064 [] worker_thread+0xd9/0xfc0 kernel/workqueue.c:2196 [] kthread+0x268/0x300 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..