Fixed errors found by MSAN

libmysqld/libmysql.c

@@ -1141,6 +1141,7 @@ my_bool STDCALL mysql_embedded(void)
 void my_net_local_init(NET *net)
 {
   net->max_packet=   (uint) net_buffer_length;
+  net->read_timeout= net->write_timeout= 0;
   my_net_set_read_timeout(net, CLIENT_NET_READ_TIMEOUT);
   my_net_set_write_timeout(net, CLIENT_NET_WRITE_TIMEOUT);
   net->retry_count=  1;

mysql-test/main/mysql_upgrade.test

@@ -17,7 +17,7 @@ let $MYSQLD_DATADIR= `select @@datadir`;
 file_exists $MYSQLD_DATADIR/mysql_upgrade_info;
 
 --echo Run it again - should say already completed
---replace_result $MYSQL_SERVER_VERSION VERSION
+--replace_regex /upgraded to .*, use/upgraded to VERSION, use/
 --exec $MYSQL_UPGRADE 2>&1
 
 # It should have created a file in the MySQL Servers datadir

mysql-test/suite/csv/read_only.test

@@ -1,3 +1,4 @@
+--source include/not_as_root.inc
 #
 # MDEV-11883 MariaDB crashes with out-of-memory when query information_schema
 #

sql/sql_load.cc

@@ -2031,8 +2031,8 @@ int READ_INFO::read_xml(THD *thd)
       
     case '=': /* attribute name end - read the value */
       //check for tag field and attribute name
-      if(!memcmp(tag.c_ptr_safe(), STRING_WITH_LEN("field")) &&
-         !memcmp(attribute.c_ptr_safe(), STRING_WITH_LEN("name")))
+      if(!strcmp(tag.c_ptr_safe(), "field") &&
+         !strcmp(attribute.c_ptr_safe(), "name"))
       {
         /*
           this is format <field name="xx">xx</field>