From 8449f0a15bca9cfd0c1a727a9319cb08d83a6426 Mon Sep 17 00:00:00 2001
From: Sergey Bugaev <bugaevc@serenityos.org>
Date: Sat, 30 May 2020 22:37:24 +0300
Subject: [PATCH] LibIPC: Fix server crashes on client disconnects

The server should always survive client communication errors.
---
 Libraries/LibIPC/ClientConnection.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Libraries/LibIPC/ClientConnection.h b/Libraries/LibIPC/ClientConnection.h
index d1a7803425..0a821cd296 100644
--- a/Libraries/LibIPC/ClientConnection.h
+++ b/Libraries/LibIPC/ClientConnection.h
@@ -121,7 +121,8 @@ public:
                 return;
             default:
                 perror("Connection::post_message write");
-                ASSERT_NOT_REACHED();
+                shutdown();
+                return;
             }
         }
 
@@ -130,6 +131,9 @@ public:
 
     void drain_messages_from_client()
     {
+        if (!m_socket->is_open())
+            return;
+
         Vector<u8> bytes;
         for (;;) {
             u8 buffer[4096];
@@ -143,7 +147,8 @@ public:
             }
             if (nread < 0) {
                 perror("recv");
-                ASSERT_NOT_REACHED();
+                shutdown();
+                return;
             }
             bytes.append(buffer, nread);
         }