Sadako ?????:
Do you actually have the virtualbox _host_ running under hardened-sources?
If so, could you please upload your kernel config somewhere?
Try the following:
Disable CONFIG_PAX_NOELFRELOCS to compile virtualbox (you can enable it
after to run virtualbox).
Disable CONFIG_PAX_KERNEXEC and CONFIG_PAX_MEMORY_UDEREF to run virtualbox.
Disable V-T/AMD-V for your guests.
It used to work for me with hardened-sources-2.6.25 on Athlon X2 (i386)
until I moved to vmware server (that is, by the way, requires just
KERNEXEC to be disabled).
