Merge pull request #144 from dfskoll/null-out-freed-pointers-to-avoid…

…-potential-use-after-free Clear out freed pointers for safety.
mariadb-corporation · Aug 30, 2020 · f7fa090 · f7fa090
2 parents cc40655 + 73dfd1e
commit f7fa090
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/libmariadb/mariadb_lib.c b/libmariadb/mariadb_lib.c
@@ -2108,6 +2108,10 @@ mysql_close(MYSQL *mysql)
     if (mysql->extension)
       free(mysql->extension);
 
+    /* Clear pointers for better safety */
+    mysql->net.extension = NULL;
+    mysql->extension = NULL;
+
     mysql->net.pvio= 0;
     if (mysql->free_me)
       free(mysql);