From: tedu <tedu@openbsd.org>
Date: Mon, 4 Jul 2016 16:12:52 +0000 (+0000)
Subject: switch calculuated thrsleep timeout to unsigned to prevent overflow
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=2195d075538ce466c030e9d6dcc122b37c492476;p=openbsd

switch calculuated thrsleep timeout to unsigned to prevent overflow
into negative values, which later causes a panic.
reported by Tim Newsham at NCC.
ok guenther
---

diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index 83e7eba33bf..d72e0f5f3c3 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_synch.c,v 1.131 2016/03/29 02:43:47 jsg Exp $	*/
+/*	$OpenBSD: kern_synch.c,v 1.132 2016/07/04 16:12:52 tedu Exp $	*/
 /*	$NetBSD: kern_synch.c,v 1.37 1996/04/22 01:38:37 christos Exp $	*/
 
 /*
@@ -491,7 +491,7 @@ thrsleep(struct proc *p, struct sys___thrsleep_args *v)
 	long ident = (long)SCARG(uap, ident);
 	struct timespec *tsp = (struct timespec *)SCARG(uap, tp);
 	void *lock = SCARG(uap, lock);
-	long long to_ticks = 0;
+	unsigned long long to_ticks = 0;
 	int abort, error;
 	clockid_t clock_id = SCARG(uap, clock_id) & 0x7;
 	int lockflags = SCARG(uap, clock_id) & 0x8;