kernel: [PARISC] led.c - fix potential stack overflow in led_proc_write()

[Eugene Teo <eugeneteo () kernel sg>]

Ilja reported way back in Nov 2007. A writer to /proc/pdc/led(?) can 
cause the kernel to consume an unbounded amount of stack, and result in 
stack corruption.

http://www.spinics.net/lists/linux-parisc/msg02960.html

If you need a CVE name, change the subject to indicate that. We are not 
requesting one as we do not support the PA-RISC architecture in our 
distribution.

Thanks, Eugene
--
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }