From: Liang Zhu <lnzhu@users.noreply.github.com>
Date: Fri, 1 Nov 2024 15:26:05 +0000 (-0700)
Subject: Fix heap corruption when calling ub_ctx_delete in Windows (#1157)
X-Git-Tag: release-1.23.0rc1~108
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=1c24cd79cccc55db6424aca348a288ba25b1bf21;p=thirdparty%2Funbound.git

Fix heap corruption when calling ub_ctx_delete in Windows (#1157)
---

diff --git a/util/tube.c b/util/tube.c
index 7d98b93c3..96187e134 100644
--- a/util/tube.c
+++ b/util/tube.c
@@ -584,7 +584,10 @@ void tube_close_write(struct tube* ATTR_UNUSED(tube))
 void tube_remove_bg_listen(struct tube* tube)
 {
 	verbose(VERB_ALGO, "tube remove_bg_listen");
-	ub_winsock_unregister_wsaevent(tube->ev_listen);
+	if (tube->ev_listen != NULL) {
+		ub_winsock_unregister_wsaevent(tube->ev_listen);
+		tube->ev_listen = NULL;
+	}
 }
 
 void tube_remove_bg_write(struct tube* tube)