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Diffstat (limited to 'security/tomoyo/load_policy.c')
-rw-r--r--security/tomoyo/load_policy.c76
1 files changed, 53 insertions, 23 deletions
diff --git a/security/tomoyo/load_policy.c b/security/tomoyo/load_policy.c
index 3312e5624f24..6a5463d26635 100644
--- a/security/tomoyo/load_policy.c
+++ b/security/tomoyo/load_policy.c
@@ -8,8 +8,27 @@
#include "common.h"
-/* path to policy loader */
-static const char *tomoyo_loader = "/sbin/tomoyo-init";
+#ifndef CONFIG_SECURITY_TOMOYO_OMIT_USERSPACE_LOADER
+
+/*
+ * Path to the policy loader. (default = CONFIG_SECURITY_TOMOYO_POLICY_LOADER)
+ */
+static const char *tomoyo_loader;
+
+/**
+ * tomoyo_loader_setup - Set policy loader.
+ *
+ * @str: Program to use as a policy loader (e.g. /sbin/tomoyo-init ).
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_loader_setup(char *str)
+{
+ tomoyo_loader = str;
+ return 0;
+}
+
+__setup("TOMOYO_loader=", tomoyo_loader_setup);
/**
* tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
@@ -18,24 +37,38 @@ static const char *tomoyo_loader = "/sbin/tomoyo-init";
*/
static bool tomoyo_policy_loader_exists(void)
{
- /*
- * Don't activate MAC if the policy loader doesn't exist.
- * If the initrd includes /sbin/init but real-root-dev has not
- * mounted on / yet, activating MAC will block the system since
- * policies are not loaded yet.
- * Thus, let do_execve() call this function every time.
- */
struct path path;
-
+ if (!tomoyo_loader)
+ tomoyo_loader = CONFIG_SECURITY_TOMOYO_POLICY_LOADER;
if (kern_path(tomoyo_loader, LOOKUP_FOLLOW, &path)) {
- printk(KERN_INFO "Not activating Mandatory Access Control now "
- "since %s doesn't exist.\n", tomoyo_loader);
+ printk(KERN_INFO "Not activating Mandatory Access Control "
+ "as %s does not exist.\n", tomoyo_loader);
return false;
}
path_put(&path);
return true;
}
+/*
+ * Path to the trigger. (default = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER)
+ */
+static const char *tomoyo_trigger;
+
+/**
+ * tomoyo_trigger_setup - Set trigger for activation.
+ *
+ * @str: Program to use as an activation trigger (e.g. /sbin/init ).
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_trigger_setup(char *str)
+{
+ tomoyo_trigger = str;
+ return 0;
+}
+
+__setup("TOMOYO_trigger=", tomoyo_trigger_setup);
+
/**
* tomoyo_load_policy - Run external policy loader to load policy.
*
@@ -51,24 +84,19 @@ static bool tomoyo_policy_loader_exists(void)
*/
void tomoyo_load_policy(const char *filename)
{
+ static bool done;
char *argv[2];
char *envp[3];
- if (tomoyo_policy_loaded)
+ if (tomoyo_policy_loaded || done)
return;
- /*
- * Check filename is /sbin/init or /sbin/tomoyo-start.
- * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
- * be passed.
- * You can create /sbin/tomoyo-start by
- * "ln -s /bin/true /sbin/tomoyo-start".
- */
- if (strcmp(filename, "/sbin/init") &&
- strcmp(filename, "/sbin/tomoyo-start"))
+ if (!tomoyo_trigger)
+ tomoyo_trigger = CONFIG_SECURITY_TOMOYO_ACTIVATION_TRIGGER;
+ if (strcmp(filename, tomoyo_trigger))
return;
if (!tomoyo_policy_loader_exists())
return;
-
+ done = true;
printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
tomoyo_loader);
argv[0] = (char *) tomoyo_loader;
@@ -79,3 +107,5 @@ void tomoyo_load_policy(const char *filename)
call_usermodehelper(argv[0], argv, envp, 1);
tomoyo_check_profile();
}
+
+#endif