Created attachment 585639 [details]
grubby --default-kernel segault when run as user

Description of problem:
grubby --default-kernel segfault when run as non privileged users.
Even if it's not supposed to do so, the command should return insufficient privilege but not to segfault. 

Version-Release number of selected component (if applicable):
grubby-8.11-1.fc17

How reproducible:
always from two different setup running f17 (i686 and x86_64).

Steps to Reproduce:
1.$ grubby --default-kernel

  
Actual results:
grubby recieved SIGSEGV!  Backtrace (6):
grubby[0x40525f]
/lib64/libc.so.6[0x38ffc359e0]
grubby[0x401bc9]
grubby[0x404232]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x38ffc21735]
grubby[0x404691]

Expected results:
return an error code or the default kernel

Additional info:
When run as root (as probably expected) the right kernel is output in one of theses setup. (then there is another bug as #736188 for the other).
# grubby --default-kernel
/boot/vmlinuz-3.3.4-5.fc17.x86_64