ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x1
WARNING: CPU: 0 PID: 26920 at kernel/signal.c:363 task_participate_group_stop+0x205/0x260 kernel/signal.c:363
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 26920 Comm: 5 Not tainted 4.19.0-rc6+ #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
kobject: 'input18' (000000000f5e0531): kobject_uevent_env
 panic+0x238/0x4e7 kernel/panic.c:184
kobject: 'input18' (000000000f5e0531): fill_kobj_path: path = '/devices/virtual/input/input18'
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
kobject: 'input18' (000000000f5e0531): fill_kobj_path: path = '/devices/virtual/input/input18'
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
input:  as /devices/virtual/input/input18
kobject: 'input18::numlock' (000000005ca2544a): kobject_add_internal: parent: 'input18', set: 'devices'
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
kobject: 'input18::numlock' (000000005ca2544a): kobject_uevent_env
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:task_participate_group_stop+0x205/0x260 kernel/signal.c:363
Code: a4 00 00 00 bb 01 00 00 00 e8 77 fd 31 00 89 d8 5b 41 5c 41 5d 41 5e 5d c3 e8 67 fd 31 00 0f 0b e9 89 fe ff ff e8 5b fd 31 00 <0f> 0b e9 f6 fe ff ff 4c 89 e7 e8 9c 6d 75 00 e9 c2 fe ff ff e8 42
kobject: 'input18::numlock' (000000005ca2544a): fill_kobj_path: path = '/devices/virtual/input/input18/input18::numlock'
RSP: 0018:ffff880187c87878 EFLAGS: 00010046
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc900022f2000
RDX: 0000000000040000 RSI: ffffffff814cd835 RDI: 0000000000000005
RBP: ffff880187c87898 R08: ffff880187c08340 R09: ffffed003178b259
R10: ffffed003178b259 R11: ffff88018bc592cb R12: ffff8801d7a867a0
kobject: 'input18::numlock' (000000005ca2544a): kobject_uevent_env
R13: ffff8801d7a86700 R14: 0000000000040000 R15: 0000000000000004
kobject: 'input18::numlock' (000000005ca2544a): fill_kobj_path: path = '/devices/virtual/input/input18/input18::numlock'
 do_signal_stop+0x264/0x9a0 kernel/signal.c:2220
kobject: 'input18::mail' (000000006dab84b0): kobject_add_internal: parent: 'input18', set: 'devices'
kobject: 'input18::mail' (000000006dab84b0): kobject_uevent_env
 get_signal+0x9ff/0x1980 kernel/signal.c:2397
kobject: 'input18::mail' (000000006dab84b0): fill_kobj_path: path = '/devices/virtual/input/input18/input18::mail'
 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816
kobject: 'event4' (0000000017b3c31d): kobject_add_internal: parent: 'input18', set: 'devices'
kobject: 'event4' (0000000017b3c31d): kobject_uevent_env
kobject: 'event4' (0000000017b3c31d): fill_kobj_path: path = '/devices/virtual/input/input18/event4'
kobject: 'input18::numlock' (000000005ca2544a): kobject_uevent_env
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
kobject: 'input18::numlock' (000000005ca2544a): fill_kobj_path: path = '/devices/virtual/input/input18/input18::numlock'
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
kobject: 'input18::numlock' (000000005ca2544a): kobject_uevent_env
kobject: 'input18::numlock' (000000005ca2544a): fill_kobj_path: path = '/devices/virtual/input/input18/input18::numlock'
kobject: 'input18::numlock' (000000005ca2544a): kobject_cleanup, parent           (null)
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0023:          (null)
kobject: 'input18::numlock' (000000005ca2544a): calling ktype release
Code: Bad RIP value.
kobject: 'input18::numlock': free name
RSP: 002b:00000000ffc7bf10 EFLAGS: 00000200 ORIG_RAX: 000000000000000b
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
kobject: 'input18::mail' (000000006dab84b0): kobject_uevent_env
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..