From 51bce128f78116e29ed6417df587f743bfe456a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Duval?= <jerome.duval@gmail.com>
Date: Fri, 12 Apr 2024 16:44:36 +0200
Subject: [PATCH] tcp: don't allow read on listening sockets

fix #18884

Change-Id: If4e337316ea4faa2f00fa73295c57e93de0a2cbc
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7616
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Rene Gollent <rene@gollent.com>
---
 src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp b/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
index c0dd281024..69bef56d5e 100644
--- a/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
+++ b/src/add-ons/kernel/network/protocols/tcp/TCPEndpoint.cpp
@@ -942,7 +942,7 @@ TCPEndpoint::ReadData(size_t numBytes, uint32 flags, net_buffer** _buffer)
 
 	*_buffer = NULL;
 
-	if (fState == CLOSED) {
+	if (fState == CLOSED || fState == LISTEN) {
 		if (socket->error != B_OK)
 			return socket->error;
 		return ENOTCONN;