kernel panic at kern/arch/x86/trap.c:312, from core 0: Proc-ful Page Fault in the Kernel at 0x00000002deadbac6!
HW TRAP frame at 0xfffffff00006dd00 on core 0
  rax  0x0000000000000001
  rbx  0x00000002deadbabe
  rcx  0x0000000000000000
  rdx  0x00000002deadbac6
  rbp  0xfffffff00006ddc8
  rsi  0x00000000ffffffff
  rdi  0x00000002deadbac6
  r8   0x0000000000000000
  r9   0x0000000000000000
  r10  0x0000000000000000
  r11  0x0000000000000202
  r12  0xffff80000218c3a0
  r13  0x00000000ffffffff
  r14  0x0000000000000003
  r15  0xffff80000218c000
  trap 0x0000000e Page Fault
  gsbs 0xffffffffc880b9c0
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc2007b47
  cs   0x------------0008
  flag 0x0000000000010206
  rsp  0xfffffff00006ddc8
  ss   0x------------0010
Backtrace of kernel context on Core 0:
#01 [<0xffffffffc2007b47>] in kref_put at include/kref.h:67
#02 [<0xffffffffc2007ec6>] in remove_fd_tap at src/fdtap.c:136
#03 [<     [inline]     >] in handle_tap_req at src/syscall.c:2318
#03 [<0xffffffffc205889c>] in sys_tap_fds at src/syscall.c:2338
#04 [<0xffffffffc2059569>] in syscall at src/syscall.c:2455
#05 [<0xffffffffc2059734>] in run_local_syscall at src/syscall.c:2490
#06 [<0xffffffffc2059c69>] in prep_syscalls at src/syscall.c:2510
#07 [<0xffffffffc20ab5fa>] in sysenter_callwrapper at arch/x86/trap.c:854