From f865b71f27b75ab350d66292657261649b75b8dd Mon Sep 17 00:00:00 2001
From: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Date: Mon, 22 May 2017 15:55:39 +0200
Subject: [PATCH] libc: fix expired-timer calculation

---
 repos/libports/src/lib/libc/task.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/repos/libports/src/lib/libc/task.cc b/repos/libports/src/lib/libc/task.cc
index 9aa67f53f..edbc34e5b 100644
--- a/repos/libports/src/lib/libc/task.cc
+++ b/repos/libports/src/lib/libc/task.cc
@@ -252,7 +252,10 @@ struct Libc::Timeout
 	{
 		unsigned long const now = _timer_accessor.timer().curr_time();
 
-		return _expired ? 0 : _absolute_timeout_ms - now;
+		if (_expired || _absolute_timeout_ms < now)
+			return 0;
+
+		return _absolute_timeout_ms - now;
 	}
 };