BIT16SZ 2, GBIT16(buf) 0 kernel panic at kern/arch/x86/trap.c:537, from core 2: This is bad!
Double fault!  Check the kernel stack pointer; you likely ran off the end of the stack.
HW TRAP frame at 0xfffffff00001df40 on core 2
  rax  0x000000000000003d
  rbx  0xffffffffc8667ec0
  rcx  0xffffffffc8667ec8
  rdx  0x00000022841efc69
  rbp  0xfffffff0000d6fd8
  rsi  0x0000000000000003
  rdi  0xffffffffc8667ec0
  r8   0x0000000000000000
  r9   0xffffffffc8667fb8
  r10  0x0000000000000078
  r11  0xffffffffc8667f78
  r12  0xffff800002174020
  r13  0x0000000000000002
  r14  0x0000000000000000
  r15  0x0000000000000002
  trap 0x00000008 Double Fault
  gsbs 0xffffffffc8667ec0
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc209f611
  cs   0x------------0008
  flag 0x0000000000010246
  rsp  0xfffffff0000d6fd8
  ss   0x------------0010
Backtrace of kernel context on Core 2:
#01 [<0xffffffffc209f611>] in cpu_halt at arch/x86/idle.c:20
#02 [<0xffffffffc2054696>] in __smp_idle at src/smp.c:84
kernel panic at kern/arch/x86/trap.c:537, from core 3: Double fault!  Check the kernel stack pointer; you likely ran off the end of the stack.
HW TRAP frame at 0xfffffff000026f40 on core 3
  rax  0x0000000000000003
  rbx  0x415d415c415b421a
  rcx  0x0000000000000003
  rdx  0x0000000000000000
  rbp  0xfffffff0000beef8
  rsi  0xffff80000d429100
  rdi  0xffffffffc20ad035
  r8   0x000030000003cee8
  r9   0x0000000000000020
  r10  0xffff8000000b8f00
  r11  0x0000000000000000
  r12  0xffff800002174f40
  r13  0xffffffffc20ad04d
  r14  0xffff80000d429100
  r15  0xffffffffc20ad035
  trap 0x00000008 Double Fault
  gsbs 0xffffffffc8668140
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc2052d27
  cs   0x------------0008
  flag 0x0000000000010086
  rsp  0xfffffff0000beec8
  ss   0x------------0010
Backtrace of kernel context on Core 3:
#01 [<0xffffffffc2052d27>] in kmem_cache_free at src/slab.c:637
#02 [<0xffffffffc205a73d>] in process_routine_kmsg at src/trap.c:228
#03 [<0xffffffffc204d303>] in proc_restartcore at src/process.c:798
#04 [<0xffffffffc20ab2a0>] in sysenter_callwrapper at arch/x86/trap.c:853