Merge pull request #2010 from pi-hole/fix/rev-servers-crash

Fix rev-server crash

Author: yubiuser

src/config/dnsmasq_config.c

@@ -732,6 +732,12 @@ bool __attribute__((const)) write_dnsmasq_config(struct config *conf, bool test_
 	{
 		log_warn("New dnsmasq configuration is not valid (%s), config remains unchanged", errbuf);
 
+		if(debug_flags[DEBUG_ANY])
+		{
+			log_debug(DEBUG_ANY, "Temporary dnsmasq config file left in place for debugging purposes");
+			return false;
+		}
+
 		// Remove temporary config file
 		if(remove(DNSMASQ_TEMP_CONF) != 0)
 		{

src/dnsmasq/option.c

@@ -1193,10 +1193,10 @@ static char *domain_rev4(int from_file, char *server, struct in_addr *addr4, int
 		return  _("error");
 	    }
 
-	  if (sdetails.orig_hostinfo)
-	    freeaddrinfo(sdetails.orig_hostinfo);
 	}
     }
+    if (sdetails.orig_hostinfo)
+      freeaddrinfo(sdetails.orig_hostinfo);
 
   return NULL;
 }
@@ -1280,11 +1280,10 @@ static char *domain_rev6(int from_file, char *server, struct in6_addr *addr6, in
 	      if (!add_update_server(flags, &serv_addr, &source_addr, interface, domain, NULL))
 		return  _("error");
 	    }
-
-	  if (sdetails.orig_hostinfo)
-	    freeaddrinfo(sdetails.orig_hostinfo);
 	}
     }
+    if (sdetails.orig_hostinfo)
+      freeaddrinfo(sdetails.orig_hostinfo);
 
   return NULL;
 }