From b975697da11ed62cbce7e528e3661e5e4ac1d81e Mon Sep 17 00:00:00 2001
From: Yuchen Pei <ycp@mariadb.com>
Date: Tue, 30 Jun 2026 13:15:15 +1000
Subject: [PATCH] MDEV-40103 Initialise thd->net in spider_create_sys_thd

net is used by THD::print_aborted_warning when threads are killed so
this needed to be initalised.

This fixes an msan "uninitialized value" bug
---
 storage/spider/spd_table.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/storage/spider/spd_table.cc b/storage/spider/spd_table.cc
index 2aaab524c6542..4f1a743f5fd4b 100644
--- a/storage/spider/spd_table.cc
+++ b/storage/spider/spd_table.cc
@@ -78,6 +78,11 @@ inline MYSQL_THD spider_create_sys_thd(SPIDER_THREAD *thread)
   THD *thd = create_thd();
   if (thd)
   {
+    if (my_net_init(&thd->net, NULL, thd, MYF(0)))
+    {
+      destroy_thd(thd);
+      return NULL;
+    }
     SPIDER_set_next_thread_id(thd);
     thd->mysys_var->current_cond = &thread->cond;
     thd->mysys_var->current_mutex = &thread->mutex;