WARNING: CPU: 0 PID: 1 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230 kernel/signal.c:340
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 1 Comm: init Not tainted 4.14.0-rc7+ #163
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:906
RIP: 0010:task_participate_group_stop+0x1ce/0x230 kernel/signal.c:340
RSP: 0018:ffff8801d9edf8b8 EFLAGS: 00010097
RAX: ffff8801d9ed4040 RBX: ffff8801d9ed4040 RCX: 0000000000000012
RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d9ed44d0
RBP: ffff8801d9edf8d0 R08: ffffffff814392fc R09: 000000000000000c
R10: ffff8801d9edf7b0 R11: 0000000000000000 R12: ffff8801d9ee1740
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d9ed45c8
 do_signal_stop+0x217/0x910 kernel/signal.c:2042
 get_signal+0x55a/0x16d0 kernel/signal.c:2297
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath+0x42f/0x510 arch/x86/entry/common.c:266
 entry_SYSCALL_64_fastpath+0xbc/0xbe
RIP: 0033:0x7f2e64060dd3
RSP: 002b:00007ffe7cff4ca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
RAX: fffffffffffffdfe RBX: 00007ffe7cff4e50 RCX: 00007f2e64060dd3
RDX: 0000000000000000 RSI: 00007ffe7cff5000 RDI: 000000000000000b
RBP: 00007ffe7cff5000 R08: 00007ffe7cff5080 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00007ffe7cff53e0 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..