kernel panic at kern/arch/x86/trap.c:312, from core 2: Proc-ful Page Fault in the Kernel at 0x0000000000100108!
HW TRAP frame at 0xfffffff00009da30 on core 2
  rax  0x0000000000200200
  rbx  0x0000000000000000
  rcx  0xffff80001480bea2
  rdx  0x0000000000100100
  rbp  0xfffffff00009db98
  rsi  0xffff8000158e6020
  rdi  0xffff800015c52820
  r8   0x0000000000000000
  r9   0xffffffffc8ad3700
  r10  0x0000000000000018
  r11  0xfffffff0000c4e70
  r12  0xffff80001480bea2
  r13  0xffff800015c52820
  r14  0xffff800015c52820
  r15  0xffff8000158e6020
  trap 0x0000000e Page Fault
  gsbs 0xffffffffc89aa100
  fsbs 0x0000000000000000
  err  0x--------00000002
  rip  0xffffffffc2043a74
  cs   0x------------0008
  flag 0x0000000000010246
  rsp  0xfffffff00009daf8
  ss   0x------------0010
Backtrace of kernel context on Core 2:
#01 [<0xffffffffc2043a74>] in tree_file_rename at src/ns/tree_file.c:904
#02 [<0xffffffffc2043ed7>] in tree_chan_rename at src/ns/tree_file.c:955
#03 [<0xffffffffc2033738>] in __namec_from at src/ns/chan.c:1295
#04 [<0xffffffffc203413f>] in namec at src/ns/chan.c:1517
#05 [<0xffffffffc203dff1>] in sysrename at src/ns/sysfile.c:876
#06 [<0xffffffffc20566e2>] in sys_rename at src/syscall.c:2286
#07 [<0xffffffffc2059f09>] in syscall at src/syscall.c:2465
#08 [<0xffffffffc205a0d4>] in run_local_syscall at src/syscall.c:2500
#09 [<0xffffffffc205a609>] in prep_syscalls at src/syscall.c:2520
#10 [<0xffffffffc20abc0a>] in sysenter_callwrapper at arch/x86/trap.c:854