Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 1 Comm: init Not tainted 4.14.0-rc8-mm1+ #21 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+0x1e4/0x41c kernel/panic.c:183 __warn+0x1dc/0x200 kernel/panic.c:547 report_bug+0x211/0x2d0 lib/bug.c:184 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline] do_trap+0x260/0x390 arch/x86/kernel/traps.c:260 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310 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:ffff8801da2e78c8 EFLAGS: 00010093 RAX: ffff8801da2d8040 RBX: ffff8801da2d8040 RCX: ffffffff814436ee RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801da2d84c0 RBP: ffff8801da2e78e0 R08: 1ffffffff0d2717b R09: 000000000000000c R10: 0000000000000000 R11: ffffffff8746ada0 R12: ffff8801da2e9840 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801da2d85b8 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: 0033:0x7f830e6f9dd3 RSP: 002b:00007ffe70be5dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000017 RAX: fffffffffffffdfe RBX: 00007ffe70be5f70 RCX: 00007f830e6f9dd3 RDX: 0000000000000000 RSI: 00007ffe70be6120 RDI: 000000000000000b RBP: 00007ffe70be6120 R08: 00007ffe70be61a0 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00007ffe70be6500 R14: 0000000000000000 R15: 0000000000000000 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..