LSM: Convert from initcall to struct lsm_info
In preparation for doing more interesting LSM init probing, this converts
the existing initcall system into an explicit call into a function pointer
from a section-collected struct lsm_info array.
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: James Morris <james.morris@microsoft.com>
Reviewed-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 97a020c616..d13059fe 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -2039,6 +2039,18 @@
extern void security_add_hooks(struct security_hook_list *hooks, int count,
char *lsm);
+struct lsm_info {
+ int (*init)(void); /* Required. */
+};
+
+extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
+
+#define security_initcall(lsm) \
+ static struct lsm_info __lsm_##lsm \
+ __used __section(.lsm_info.init) \
+ __aligned(sizeof(unsigned long)) \
+ = { .init = lsm, }
+
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
/*
* Assuring the safety of deleting a security module is up to