kernel panic at kern/arch/x86/trap.c:540, from core 3: Double fault!  Check the kernel stack pointer; you likely ran off the end of the stack.
HW TRAP frame at 0xfffffff00001df40 on core 3
  rax  0xffffffffc8667b08
  rbx  0xffffffffc8667b08
  rcx  0x6f01c1591b43b39d
  rdx  0x0000000000000046
  rbp  0xfffffff0000afcb8
  rsi  0xffff800002c62648
  rdi  0xffffffffc8667b08
  r8   0x0000000000000000
  r9   0x6f01c1591b43b39d
  r10  0x0000000000000000
  r11  0x0000000000000000
  r12  0xffff800002c62648
  r13  0x0000000000000246
  r14  0xffff800002c62648
  r15  0xffff800002c62620
  trap 0x00000008 Double Fault
  gsbs 0xffffffffc8668140
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc8667b52
  cs   0x------------0008
  flag 0x0000000000010002
  rsp  0xfffffff0000afcb0
  ss   0x------------0010
Backtrace of kernel context on Core 3:
#01 [<0xffffffffc8667b52>] in per_cpu_info
#02 [<0xffffffffc20001ca>] in __set_alarm at src/alarm.c:240
#03 [<     [inline]     >] in __set_alarm_rkm at src/alarm.c:260
#03 [<0xffffffffc2000662>] in set_alarm at src/alarm.c:271
#04 [<     [inline]     >] in set_proc_alarm at drivers/dev/alarm.c:447
#04 [<0xffffffffc207235f>] in alarmwrite at drivers/dev/alarm.c:468
#05 [<0xffffffffc2040221>] in rwrite at src/ns/sysfile.c:1123
#06 [<0xffffffffc204043b>] in syswrite at src/ns/sysfile.c:1141
#07 [<0xffffffffc2055f61>] in sys_write at src/syscall.c:1785
#08 [<0xffffffffc2059439>] in syscall at src/syscall.c:2528
#09 [<0xffffffffc2059604>] in run_local_syscall at src/syscall.c:2563
#10 [<0xffffffffc2059b39>] in prep_syscalls at src/syscall.c:2583
#11 [<0xffffffffc20ab38a>] in sysenter_callwrapper at arch/x86/trap.c:854
kernel panic at kern/src/rcu.c:323, from core 2: assertion failed: rpi->gp_acked + 1 == READ_ONCE(rsp->gpnum)
Stack Backtrace on Core 2:
#01 [<0xffffffffc200a2bc>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009afd>] in _panic at src/init.c:268
#03 [<0xffffffffc20504fb>] in rcu_report_qs_rpi at src/rcu.c:323
#04 [<0xffffffffc2050edc>] in rcu_report_qs at src/rcu.c:338
#05 [<0xffffffffc2054633>] in __smp_idle at src/smp.c:75