Kernel panic - not syncing: panic_on_warn set ...

CPU: 3 PID: 1 Comm: init Not tainted 4.14.0-next-20171114+ #14
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:177
 fixup_bug arch/x86/kernel/traps.c:246 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:926
RIP: 0010:task_participate_group_stop+0x1ce/0x230 kernel/signal.c:340
RSP: 0018:ffff88002df8f8c8 EFLAGS: 00010093
RAX: ffff88002df86040 RBX: ffff88002df86040 RCX: ffffffff8144169e
RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff88002df864c0
RBP: ffff88002df8f8e0 R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000000 R11: ffffffff8744dce0 R12: ffff88007faa6040
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88002df865b8
 do_signal_stop+0x217/0x910 kernel/signal.c:2041
 get_signal+0x55a/0x16c0 kernel/signal.c:2296
 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:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x94/0x96
RIP: 0033:0x7f7dd5e7ddd3
RSP: 002b:00007ffd230cecf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017
RAX: fffffffffffffdfe RBX: 00007ffd230ceea0 RCX: 00007f7dd5e7ddd3
RDX: 0000000000000000 RSI: 00007ffd230cf050 RDI: 000000000000000b
RBP: 00007ffd230cf050 R08: 00007ffd230cf0d0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00007ffd230cf430 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..