UBUNTU: SAUCE: (drop after 2.6.38) use %pK for /proc/kallsyms and /proc/modules

UBUNTU: SAUCE: (drop after 2.6.38) use %pK for /proc/kallsyms and /proc/modules

This should be in the 2.6.39 kernel from the -mm tree

In an effort to reduce kernel address leaks that might be used to
help target kernel privilege escalation exploits, this patch uses
%pK when displaying addresses in /proc/kallsyms, /proc/modules, and
/sys/module/*/sections/*.

Note that this changes %x to %p, so some legitimately 0 values in
/proc/kallsyms would have changed from 00000000 to "(null)". To avoid
this, "(null)" is not used when using the "K" format. Anything that was
already successfully parsing "(null)" in addition to full hex digits
should have no problem with this change. (Thanks to Joe Perches for
the suggestion.) Due to the %x to %p, "void *" casts are needed since
these addresses are already "unsigned long" everywhere internally, due
to their starting life as ELF section offsets.

Signed-off-by: Kees Cook <kees.cook@canonical.com>
Cc: Eugene Teo <eugene@redhat.com>
Cc: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>