From d5d330f82a54d23ef16fdbd3579e40e1a8364743 Mon Sep 17 00:00:00 2001
From: Daniel Black <daniel@mariadb.org>
Date: Tue, 27 May 2025 16:18:50 +1000
Subject: [PATCH] mariadb_reconnect: reconnection may fail to allocate
 extensions

If this the case, tmp_mysql.extensions will be a null pointer
and the rest of the reconnection cannot continue.
---
 libmariadb/mariadb_lib.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libmariadb/mariadb_lib.c b/libmariadb/mariadb_lib.c
index 5122166c..bb99384f 100644
--- a/libmariadb/mariadb_lib.c
+++ b/libmariadb/mariadb_lib.c
@@ -2111,7 +2111,14 @@ my_bool STDCALL mariadb_reconnect(MYSQL *mysql)
     return(1);
   }
 
-  mysql_init(&tmp_mysql);
+  if (!mysql_init(&tmp_mysql))
+  {
+    /* extensions may have failed to allocate */
+    SET_CLIENT_ERROR(mysql, CR_OUT_OF_MEMORY, SQLSTATE_UNKNOWN, 0);
+    tmp_mysql.free_me= 0;
+    mysql_close(&tmp_mysql);
+    return(1);
+  }
   tmp_mysql.free_me= 0;
   tmp_mysql.options=mysql->options;
   if (mysql->extension->conn_hdlr)