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authorMatthew Garrett <matthewgarrett@google.com>2019-08-19 17:17:39 -0700
committerJames Morris <jmorris@namei.org>2019-08-19 21:54:15 -0700
commit000d388ed3bbed745f366ce71b2bb7c2ee70f449 (patch)
tree8df5d266713aa79f5009a515ec5db597a61aba30 /include
parentsecurity: Add a "locked down" LSM hook (diff)
downloadlinux-dev-000d388ed3bbed745f366ce71b2bb7c2ee70f449.tar.xz
linux-dev-000d388ed3bbed745f366ce71b2bb7c2ee70f449.zip
security: Add a static lockdown policy LSM
While existing LSMs can be extended to handle lockdown policy, distributions generally want to be able to apply a straightforward static policy. This patch adds a simple LSM that can be configured to reject either integrity or all lockdown queries, and can be configured at runtime (through securityfs), boot time (via a kernel parameter) or build time (via a kconfig option). Based on initial code by David Howells. Signed-off-by: Matthew Garrett <mjg59@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/security.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h
index 04cf48fab15d..74787335d9ce 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -97,6 +97,9 @@ enum lsm_event {
* potentially a moving target. It is easy to misuse this information
* in a way that could break userspace. Please be careful not to do
* so.
+ *
+ * If you add to this, remember to extend lockdown_reasons in
+ * security/lockdown/lockdown.c.
*/
enum lockdown_reason {
LOCKDOWN_NONE,