Skip WfsDelay when the exploit has clearly failed

lib/msf/base/simple/exploit.rb

@@ -237,6 +237,9 @@ module Exploit
 
     # Report the failure (and attempt) in the database
     self.report_failure
+
+    # Interrupt any session waiters in the handler
+    self.interrupt_handler
   end
   #
   # Calls the class method.

lib/msf/core/exploit.rb

@@ -1193,9 +1193,23 @@ class Exploit < Msf::Module
   # value can be one of the Handler::constants.
   #
   def handler(*args)
-    return if not payload_instance
-    return if not handler_enabled?
-    return payload_instance.handler(*args)
+    return unless (
+      payload_instance &&
+      handler_enabled?
+    )
+    payload_instance.handler(*args)
+  end
+
+  #
+  # Break out of the session wait loop (WfsDelay)
+  #
+  def interrupt_handler
+    return unless (
+      payload_instance &&
+      handler_enabled? &&
+      payload_instance.respond_to?(:interrupt_wait_for_session)
+    )
+    payload_instance.interrupt_wait_for_session()
   end
 
   ##

lib/msf/core/handler.rb

@@ -162,6 +162,14 @@ module Handler
     return session
   end
 
+  #
+  # Interrupts a wait_for_session call by notifying with a nil event
+  #
+  def interrupt_wait_for_session
+    return unless session_waiter_event
+    session_waiter_event.notify(nil)
+  end
+
   #
   # Set by the exploit module to configure handler
   #