apparmor: rename audit_data->label to audit_data->subj_label

rename audit_data's label field to subj_label to better reflect its
use. Also at the same time drop unneeded assignments to ->subj_label
as the later call to aa_check_perms will do the assignment if needed.
Reviewed-by: Georgia Garcia <georgia.garcia@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>

security/apparmor/audit.c

@@ -113,8 +113,8 @@ static void audit_pre(struct audit_buffer *ab, void *va)
 			audit_log_format(ab, " error=%d", ad->error);
 	}
 
-	if (ad->label) {
-		struct aa_label *label = ad->label;
+	if (ad->subj_label) {
+		struct aa_label *label = ad->subj_label;
 
 		if (label_isprofile(label)) {
 			struct aa_profile *profile = labels_profile(label);
@@ -187,7 +187,7 @@ int aa_audit(int type, struct aa_profile *profile,
 	if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
 		type = AUDIT_APPARMOR_KILL;
 
-	ad->label = &profile->label;
+	ad->subj_label = &profile->label;
 
 	aa_audit_msg(type, ad, cb);
 

security/apparmor/file.c

@@ -67,7 +67,7 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
 
 	if (ad->peer) {
 		audit_log_format(ab, " target=");
-		aa_label_xaudit(ab, labels_ns(ad->label), ad->peer,
+		aa_label_xaudit(ab, labels_ns(ad->subj_label), ad->peer,
 				FLAG_VIEW_SUBNS, GFP_KERNEL);
 	} else if (ad->fs.target) {
 		audit_log_format(ab, " target=");

security/apparmor/include/audit.h

@@ -109,7 +109,7 @@ struct apparmor_audit_data {
 	int type;
 	u16 class;
 	const char *op;
-	struct aa_label *label;
+	struct aa_label *subj_label;
 	const char *name;
 	const char *info;
 	u32 request;

security/apparmor/ipc.c

@@ -71,7 +71,7 @@ static void audit_signal_cb(struct audit_buffer *ab, void *va)
 		audit_log_format(ab, " signal=rtmin+%d",
 				 ad->signal - SIGRT_BASE);
 	audit_log_format(ab, " peer=");
-	aa_label_xaudit(ab, labels_ns(ad->label), ad->peer,
+	aa_label_xaudit(ab, labels_ns(ad->subj_label), ad->peer,
 			FLAGS_NONE, GFP_ATOMIC);
 }
 

security/apparmor/lib.c

@@ -297,7 +297,7 @@ static void aa_audit_perms_cb(struct audit_buffer *ab, void *va)
 				   PERMS_NAMES_MASK);
 	}
 	audit_log_format(ab, " peer=");
-	aa_label_xaudit(ab, labels_ns(ad->label), ad->peer,
+	aa_label_xaudit(ab, labels_ns(ad->subj_label), ad->peer,
 				      FLAGS_NONE, GFP_ATOMIC);
 }
 
@@ -357,7 +357,6 @@ int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target,
 						    typeof(*rules), list);
 	struct aa_perms perms;
 
-	ad->label = &profile->label;
 	ad->peer = &target->label;
 	ad->request = request;
 
@@ -419,7 +418,7 @@ int aa_check_perms(struct aa_profile *profile, struct aa_perms *perms,
 	}
 
 	if (ad) {
-		ad->label = &profile->label;
+		ad->subj_label = &profile->label;
 		ad->request = request;
 		ad->denied = denied;
 		ad->error = error;

security/apparmor/lsm.c

@@ -722,11 +722,11 @@ static int apparmor_setprocattr(const char *name, void *value,
 	return error;
 
 fail:
-	ad.label = begin_current_label_crit_section();
+	ad.subj_label = begin_current_label_crit_section();
 	ad.info = name;
 	ad.error = error = -EINVAL;
 	aa_audit_msg(AUDIT_APPARMOR_DENIED, &ad, NULL);
-	end_current_label_crit_section(ad.label);
+	end_current_label_crit_section(ad.subj_label);
 	goto out;
 }
 

security/apparmor/net.c

@@ -100,7 +100,7 @@ void audit_net_cb(struct audit_buffer *ab, void *va)
 	}
 	if (ad->peer) {
 		audit_log_format(ab, " peer=");
-		aa_label_xaudit(ab, labels_ns(ad->label), ad->peer,
+		aa_label_xaudit(ab, labels_ns(ad->subj_label), ad->peer,
 				FLAGS_NONE, GFP_ATOMIC);
 	}
 }

security/apparmor/policy.c

@@ -733,7 +733,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
 
 /**
  * audit_policy - Do auditing of policy changes
- * @label: label to check if it can manage policy
+ * @subj_label: label to check if it can manage policy
  * @op: policy operation being performed
  * @ns_name: name of namespace being manipulated
  * @name: name of profile being manipulated (NOT NULL)
@@ -742,7 +742,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
  *
  * Returns: the error to be returned after audit is done
  */
-static int audit_policy(struct aa_label *label, const char *op,
+static int audit_policy(struct aa_label *subj_label, const char *op,
 			const char *ns_name, const char *name,
 			const char *info, int error)
 {
@@ -752,7 +752,7 @@ static int audit_policy(struct aa_label *label, const char *op,
 	ad.name = name;
 	ad.info = info;
 	ad.error = error;
-	ad.label = label;
+	ad.subj_label = subj_label;
 
 	aa_audit_msg(AUDIT_APPARMOR_STATUS, &ad, audit_cb);
 

security/apparmor/resource.c

@@ -36,7 +36,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
 			 rlim_names[ad->rlim.rlim], ad->rlim.max);
 	if (ad->peer) {
 		audit_log_format(ab, " peer=");
-		aa_label_xaudit(ab, labels_ns(ad->label), ad->peer,
+		aa_label_xaudit(ab, labels_ns(ad->subj_label), ad->peer,
 				FLAGS_NONE, GFP_ATOMIC);
 	}
 }

security/apparmor/task.c

@@ -217,7 +217,7 @@ static void audit_ptrace_cb(struct audit_buffer *ab, void *va)
 		}
 	}
 	audit_log_format(ab, " peer=");
-	aa_label_xaudit(ab, labels_ns(ad->label), ad->peer,
+	aa_label_xaudit(ab, labels_ns(ad->subj_label), ad->peer,
 			FLAGS_NONE, GFP_ATOMIC);
 }
 
@@ -263,7 +263,7 @@ static int profile_tracer_perm(struct aa_profile *tracer,
 	if (&tracer->label == tracee)
 		return 0;
 
-	ad->label = &tracer->label;
+	ad->subj_label = &tracer->label;
 	ad->peer = tracee;
 	ad->request = 0;
 	ad->error = aa_capable(&tracer->label, CAP_SYS_PTRACE,