apparmor: add user mode flag

Allow the profile to contain a user mode prompt flag. This works similar
to complain mode but will try to send messages to a userspace daemon.
If the daemon is not present or timesout regular informent will occur.

Signed-off-by: John Johansen <john.johansen@canonical.com>

security/apparmor/include/policy.h

@@ -44,6 +44,8 @@ extern const char *const aa_profile_mode_names[];
 
 #define COMPLAIN_MODE(_profile)	PROFILE_MODE((_profile), APPARMOR_COMPLAIN)
 
+#define USER_MODE(_profile)	PROFILE_MODE((_profile), APPARMOR_USER)
+
 #define KILL_MODE(_profile) PROFILE_MODE((_profile), APPARMOR_KILL)
 
 #define PROFILE_IS_HAT(_profile) ((_profile)->label.flags & FLAG_HAT)
@@ -67,6 +69,7 @@ enum profile_mode {
 	APPARMOR_COMPLAIN,	/* allow and log access violations */
 	APPARMOR_KILL,		/* kill task on access violation */
 	APPARMOR_UNCONFINED,	/* profile set to unconfined */
+	APPARMOR_USER,		/* modified complain mode to userspace */
 };
 
 

security/apparmor/include/policy_unpack.h

@@ -36,6 +36,7 @@ struct aa_load_ent *aa_load_ent_alloc(void);
 #define PACKED_MODE_COMPLAIN	1
 #define PACKED_MODE_KILL	2
 #define PACKED_MODE_UNCONFINED	3
+#define PACKED_MODE_USER	4
 
 struct aa_ns;
 

security/apparmor/lib.c

@@ -327,11 +327,8 @@ void aa_apply_modes_to_perms(struct aa_profile *profile, struct aa_perms *perms)
 		perms->kill = ALL_PERMS_MASK;
 	else if (COMPLAIN_MODE(profile))
 		perms->complain = ALL_PERMS_MASK;
-/*
- *  TODO:
- *	else if (PROMPT_MODE(profile))
- *		perms->prompt = ALL_PERMS_MASK;
- */
+	else if (USER_MODE(profile))
+		perms->prompt = ALL_PERMS_MASK;
 }
 
 /**

security/apparmor/policy.c

@@ -94,6 +94,7 @@ const char *const aa_profile_mode_names[] = {
 	"complain",
 	"kill",
 	"unconfined",
+	"user",
 };
 
 

security/apparmor/policy_unpack.c

@@ -761,6 +761,8 @@ static struct aa_profile *unpack_profile(struct aa_ext *e, char **ns_name)
 	} else if (tmp == PACKED_MODE_UNCONFINED) {
 		profile->mode = APPARMOR_UNCONFINED;
 		profile->label.flags |= FLAG_UNCONFINED;
+	} else if (tmp == PACKED_MODE_USER) {
+		profile->mode = APPARMOR_USER;
 	} else {
 		goto fail;
 	}