From: Stephan Bosch <stephan.bosch@open-xchange.com>
Date: Mon, 21 Mar 2022 11:22:38 +0000 (+0100)
Subject: lib-http: http-server-connection - Fix segfault occurring when output is resumed... 
X-Git-Tag: 2.3.21~100
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d3aa3d876a98a5a757be46f1b9bee22e1bd3cd3e;p=thirdparty%2Fdovecot%2Fcore.git

lib-http: http-server-connection - Fix segfault occurring when output is resumed on closed connection.
---

diff --git a/src/lib-http/http-server-connection.c b/src/lib-http/http-server-connection.c
index 801a7037f1..ad704eabed 100644
--- a/src/lib-http/http-server-connection.c
+++ b/src/lib-http/http-server-connection.c
@@ -929,11 +929,14 @@ void http_server_connection_output_halt(struct http_server_connection *conn)
 
 void http_server_connection_output_resume(struct http_server_connection *conn)
 {
-	if (conn->output_halted) {
-		conn->output_halted = FALSE;
-		o_stream_set_flush_callback(conn->conn.output,
-					    http_server_connection_output, conn);
-	}
+	if (!conn->output_halted)
+		return;
+	conn->output_halted = FALSE;
+
+	if (conn->conn.output == NULL)
+		return;
+	o_stream_set_flush_callback(conn->conn.output,
+				    http_server_connection_output, conn);
 }
 
 bool http_server_connection_pending_payload(