tree bae6bd123c8f573e844a7af11c96eb5f6a73e0ee
parent 8a6f83afd0c5355db6d11394a798e94950306239
author Kees Cook <kees@ubuntu.com> 1238712569 -0700
committer James Morris <jmorris@namei.org> 1238719631 +1100

modules: sysctl to block module loading

Implement a sysctl file that disables module-loading system-wide since
there is no longer a viable way to remove CAP_SYS_MODULE after the system
bounding capability set was removed in 2.6.25.

Value can only be set to "1", and is tested only if standard capability
checks allow CAP_SYS_MODULE.  Given existing /dev/mem protections, this
should allow administrators a one-way method to block module loading
after initial boot-time module loading has finished.

Signed-off-by: Kees Cook <kees.cook@canonical.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>