From 9de61e7014360f0195e78713946053454582c9f7 Mon Sep 17 00:00:00 2001
From: Norman Feske <norman.feske@genode-labs.com>
Date: Wed, 3 Mar 2021 17:35:57 +0100
Subject: [PATCH] base: detect truncated session args

This patch reflects the truncation of session arguments (e.g., by very
long session labels) by denying the session request.

Fixes #4037
---
 repos/base/src/lib/base/component.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/repos/base/src/lib/base/component.cc b/repos/base/src/lib/base/component.cc
index 568be31efb..8973e3b6b5 100644
--- a/repos/base/src/lib/base/component.cc
+++ b/repos/base/src/lib/base/component.cc
@@ -121,6 +121,11 @@ namespace {
 		                           Parent::Session_args const &args,
 		                           Affinity             const &affinity) override
 		{
+			if (!args.valid_string()) {
+				warning(name.string(), " session denied because of truncated arguments");
+				throw Service_denied();
+			}
+
 			Mutex::Guard guard(_mutex);
 
 			/*