kernel warning at kern/src/printfmt.c:130, from core 2: _x && _x < ULIM
Stack Backtrace on Core 2:
#01 [<0xffffffffc200a42c>] in backtrace at src/kdebug.c:235
#02 [<0xffffffffc2009c54>] in _warn at src/init.c:326
#03 [<0xffffffffc20490a0>] in vprintfmt at src/printfmt.c:130
#04 [<0xffffffffc2049322>] in vsnprintf at src/printfmt.c:328
#05 [<0xffffffffc2058549>] in vset_errstr at src/syscall.c:509
#06 [<0xffffffffc205867b>] in set_error at src/syscall.c:542
#07 [<0xffffffffc2039a39>] in cmderror at src/ns/parse.c:121
#08 [<0xffffffffc2039b2b>] in lookupcmd at src/ns/parse.c:152
#09 [<0xffffffffc206274c>] in igbectl at drivers/net/etherigbe.c:731
#10 [<0xffffffffc20795b9>] in etherwrite at drivers/dev/ether.c:490
#11 [<0xffffffffc2040649>] in rwrite at src/ns/sysfile.c:1117
#12 [<0xffffffffc204089b>] in syswrite at src/ns/sysfile.c:1135
#13 [<0xffffffffc20593f9>] in sys_write at src/syscall.c:1785
#14 [<0xffffffffc2059f59>] in syscall at src/syscall.c:2577
#15 [<0xffffffffc205ab08>] in run_local_syscall at src/syscall.c:2614
#16 [<0xffffffffc205b049>] in prep_syscalls at src/syscall.c:2634
#17 [<0xffffffffc20ac912>] in sysenter_callwrapper at arch/x86/trap.c:877
kernel panic at kern/arch/x86/trap.c:318, from core 2: Proc-ful Page Fault in the Kernel at 0x000000000000000a!
HW TRAP frame at 0xfffffff00008e960 on core 2
  rax  0xfffffff00008ead0
  rbx  0x000000000000000a
  rcx  0xffff800004abe278
  rdx  0xffff800004abe277
  rbp  0xfffffff00008ea48
  rsi  0xfffffff00008eac8
  rdi  0x0000000000000000
  r8   0x0000000000000010
  r9   0x0000000000000030
  r10  0xffff8000000b8f00
  r11  0xffffffffc20b8af6
  r12  0xffffffffc2048840
  r13  0xfffffff00008eac8
  r14  0x000000000000000a
  r15  0xffff800004abe1e0
  trap 0x0000000e Page Fault
  gsbs 0xffffffffc8e38080
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc20192b0
  cs   0x------------0008
  flag 0x0000000000010296
  rsp  0xfffffff00008ea28
  ss   0x------------0010
Backtrace of kernel context on Core 2:
#01 [<0xffffffffc20192b0>] in printchan at src/net/eipconv.c:152
#02 [<0xffffffffc2048ac9>] in vprintfmt at src/printfmt.c:131
#03 [<0xffffffffc2049322>] in vsnprintf at src/printfmt.c:328
#04 [<0xffffffffc2058549>] in vset_errstr at src/syscall.c:509
#05 [<0xffffffffc205867b>] in set_error at src/syscall.c:542
#06 [<0xffffffffc2039a39>] in cmderror at src/ns/parse.c:121
#07 [<0xffffffffc2039b2b>] in lookupcmd at src/ns/parse.c:152
#08 [<0xffffffffc206274c>] in igbectl at drivers/net/etherigbe.c:731
#09 [<0xffffffffc20795b9>] in etherwrite at drivers/dev/ether.c:490
#10 [<0xffffffffc2040649>] in rwrite at src/ns/sysfile.c:1117
#11 [<0xffffffffc204089b>] in syswrite at src/ns/sysfile.c:1135
#12 [<0xffffffffc20593f9>] in sys_write at src/syscall.c:1785
#13 [<0xffffffffc2059f59>] in syscall at src/syscall.c:2577
#14 [<0xffffffffc205ab08>] in run_local_syscall at src/syscall.c:2614
#15 [<0xffffffffc205b049>] in prep_syscalls at src/syscall.c:2634
#16 [<0xffffffffc20ac912>] in sysenter_callwrapper at arch/x86/trap.c:877