Audit: clean up all op= output to include string quoting

A number of places in the audit system we send an op= followed by a string
that includes spaces.  Somehow this works but it's just wrong.  This patch
moves all of those that I could find to be quoted.

Example:

Change From: type=CONFIG_CHANGE msg=audit(1244666690.117:31): auid=0 ses=1
subj=unconfined_u:unconfined_r:auditctl_t:s0-s0:c0.c1023 op=remove rule
key="number2" list=4 res=0

Change To: type=CONFIG_CHANGE msg=audit(1244666690.117:31): auid=0 ses=1
subj=unconfined_u:unconfined_r:auditctl_t:s0-s0:c0.c1023 op="remove rule"
key="number2" list=4 res=0

Signed-off-by: Eric Paris <eparis@redhat.com>

include/linux/audit.h

@@ -599,6 +599,8 @@ extern void		    audit_log_untrustedstring(struct audit_buffer *ab,
 extern void		    audit_log_d_path(struct audit_buffer *ab,
 					     const char *prefix,
 					     struct path *path);
+extern void		    audit_log_key(struct audit_buffer *ab,
+					  char *key);
 extern void		    audit_log_lost(const char *message);
 extern int		    audit_update_lsm_rules(void);
 
@@ -621,6 +623,7 @@ extern int audit_enabled;
 #define audit_log_n_untrustedstring(a,n,s) do { ; } while (0)
 #define audit_log_untrustedstring(a,s) do { ; } while (0)
 #define audit_log_d_path(b, p, d) do { ; } while (0)
+#define audit_log_key(b, k) do { ; } while (0)
 #define audit_enabled 0
 #endif
 #endif

kernel/audit.c

@@ -1450,6 +1450,15 @@ void audit_log_d_path(struct audit_buffer *ab, const char *prefix,
 	kfree(pathname);
 }
 
+void audit_log_key(struct audit_buffer *ab, char *key)
+{
+	audit_log_format(ab, " key=");
+	if (key)
+		audit_log_untrustedstring(ab, key);
+	else
+		audit_log_format(ab, "(null)");
+}
+
 /**
  * audit_log_end - end one audit record
  * @ab: the audit_buffer

kernel/audit_tree.c

@@ -441,13 +441,11 @@ static void kill_rules(struct audit_tree *tree)
 		if (rule->tree) {
 			/* not a half-baked one */
 			ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE);
-			audit_log_format(ab, "op=remove rule dir=");
+			audit_log_format(ab, "op=");
+			audit_log_string(ab, "remove rule");
+			audit_log_format(ab, " dir=");
 			audit_log_untrustedstring(ab, rule->tree->pathname);
-			if (rule->filterkey) {
+			audit_log_key(ab, rule->filterkey);
-				audit_log_format(ab, " key=");
-				audit_log_untrustedstring(ab, rule->filterkey);
-			} else
-				audit_log_format(ab, " key=(null)");
 			audit_log_format(ab, " list=%d res=1", rule->listnr);
 			audit_log_end(ab);
 			rule->tree = NULL;

kernel/audit_watch.c

@@ -234,11 +234,7 @@ static void audit_watch_log_rule_change(struct audit_krule *r, struct audit_watc
 		audit_log_string(ab, op);
 		audit_log_format(ab, " path=");
 		audit_log_untrustedstring(ab, w->path);
-		if (r->filterkey) {
+		audit_log_key(ab, r->filterkey);
-			audit_log_format(ab, " key=");
-			audit_log_untrustedstring(ab, r->filterkey);
-		} else
-			audit_log_format(ab, " key=(null)");
 		audit_log_format(ab, " list=%d res=1", r->listnr);
 		audit_log_end(ab);
 	}

kernel/auditfilter.c

@@ -1079,11 +1079,9 @@ static void audit_log_rule_change(uid_t loginuid, u32 sessionid, u32 sid,
 			security_release_secctx(ctx, len);
 		}
 	}
-	audit_log_format(ab, " op=%s rule key=", action);
+	audit_log_format(ab, " op=");
-	if (rule->filterkey)
+	audit_log_string(ab, action);
-		audit_log_untrustedstring(ab, rule->filterkey);
+	audit_log_key(ab, rule->filterkey);
-	else
-		audit_log_format(ab, "(null)");
 	audit_log_format(ab, " list=%d res=%d", rule->listnr, res);
 	audit_log_end(ab);
 }
@@ -1147,7 +1145,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
 			return PTR_ERR(entry);
 
 		err = audit_add_rule(entry);
-		audit_log_rule_change(loginuid, sessionid, sid, "add",
+		audit_log_rule_change(loginuid, sessionid, sid, "add rule",
 				      &entry->rule, !err);
 
 		if (err)
@@ -1163,7 +1161,7 @@ int audit_receive_filter(int type, int pid, int uid, int seq, void *data,
 			return PTR_ERR(entry);
 
 		err = audit_del_rule(entry);
-		audit_log_rule_change(loginuid, sessionid, sid, "remove",
+		audit_log_rule_change(loginuid, sessionid, sid, "remove rule",
 				      &entry->rule, !err);
 
 		audit_free_rule(entry);

kernel/auditsc.c

@@ -1137,7 +1137,7 @@ static int audit_log_single_execve_arg(struct audit_context *context,
 		if (has_cntl)
 			audit_log_n_hex(*ab, buf, to_send);
 		else
-			audit_log_format(*ab, "\"%s\"", buf);
+			audit_log_string(*ab, buf);
 
 		p += to_send;
 		len_left -= to_send;
@@ -1372,11 +1372,7 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 
 
 	audit_log_task_info(ab, tsk);
-	if (context->filterkey) {
+	audit_log_key(ab, context->filterkey);
-		audit_log_format(ab, " key=");
-		audit_log_untrustedstring(ab, context->filterkey);
-	} else
-		audit_log_format(ab, " key=(null)");
 	audit_log_end(ab);
 
 	for (aux = context->aux; aux; aux = aux->next) {