kernel panic at kern/arch/x86/trap.c:540, from core 2: Double fault!  Check the kernel stack pointer; you likely ran off the end of the stack.
HW TRAP frame at 0xfffffff000026f40 on core 2
  rax  0x000000000000003d
  rbx  0xffffffffc8667ec0
  rcx  0xffffffffc8667ec8
  rdx  0x00000020e629aecf
  rbp  0xfffffff0000a9fd8
  rsi  0x0000000000000003
  rdi  0xffffffffc8667ec0
  r8   0x0000000000000000
  r9   0xffffffffc8667fb8
  r10  0x0000000000000078
  r11  0xffffffffc8667f78
  r12  0xffff80000217cf60
  r13  0x0000000000000002
  r14  0x0000000000000000
  r15  0x0000000000000002
  trap 0x00000008 Double Fault
  gsbs 0xffffffffc8667ec0
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc209f6c1
  cs   0x------------0008
  flag 0x0000000000010246
  rsp  0xfffffff0000a9fd8
  ss   0x------------0010
Backtrace of kernel context on Core 2:
#01 [<0xffffffffc209f6c1>] in cpu_halt at arch/x86/idle.c:20
#02 [<0xffffffffc2054706>] in __smp_idle at src/smp.c:84
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 0xfffffff00001af40 on core 3
  rax  0x0000000080000001
  rbx  0xffffffffc20bd480
  rcx  0x00000000000003d4
  rdx  0x0000000000001163
  rbp  0xfffffff000100c48
  rsi  0x0000000000000780
  rdi  0xffffffffc210eb30
  r8   0xffff8000000b8fa0
  r9   0x0000000000000f00
  r10  0xffff8000000b8f00
  r11  0xffff8000000b8ec0
  r12  0xffffffffc20b89cf
  r13  0x0000000000000034
  r14  0x0000000000000075
  r15  0xffff8000144e0f40
  trap 0x00000008 Double Fault
  gsbs 0xffffffffc8668140
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc2048014
  cs   0x------------0008
  flag 0x0000000000010202
  rsp  0xfffffff000100c48
  ss   0x------------0010
Backtrace of kernel context on Core 3:
#01 [<     [inline]     >] in spin_unlock_irqsave.part.2 at include/atomic.h:302
#01 [<0xffffffffc2048014>] in print_unlock.part.2 at src/printf.c:37
#02 [<0xffffffffc2048179>] in print_unlock at src/printf.c:32
#03 [<0xffffffffc2009b94>] in _warn at src/init.c:323
#04 [<0xffffffffc2034c3d>] in statcheck at src/ns/convM2D.c:51
#05 [<0xffffffffc203dee8>] in validstat at src/ns/sysfile.c:961
#06 [<0xffffffffc203e0a6>] in syswstat at src/ns/sysfile.c:1159
#07 [<0xffffffffc2055c5f>] in sys_wstat at src/syscall.c:2329
#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