diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.cpp
@@ -97,6 +97,8 @@
     uint16_t &port, std::string &socket_name) {
   if (port == UINT16_MAX)
     port = GetNextAvailablePort();
+  if (port == UINT16_MAX)
+    return Status("Could not find an available port to launch a gdbserver.");
 
   // Spawn a new thread to accept the port that gets bound after binding to
   // port 0 (zero).