From 518d157f76c743612159118def1b5b3a130817f0 Mon Sep 17 00:00:00 2001
From: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Date: Tue, 6 Nov 2018 14:39:00 +0100
Subject: [PATCH] os: avoid null pointer acces in alarm lib

Issue #3022
---
 repos/os/src/lib/alarm/alarm.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/repos/os/src/lib/alarm/alarm.cc b/repos/os/src/lib/alarm/alarm.cc
index cdd331c2ab..945d29e39f 100644
--- a/repos/os/src/lib/alarm/alarm.cc
+++ b/repos/os/src/lib/alarm/alarm.cc
@@ -261,7 +261,7 @@ bool Alarm_scheduler::next_deadline(Alarm::Time *deadline)
 	if (deadline)
 		*deadline = _head->_raw.deadline;
 
-	if (*deadline < _min_handle_period.deadline) {
+	if (deadline && *deadline < _min_handle_period.deadline) {
 		*deadline = _min_handle_period.deadline;
 	}
 	return true;