From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Thu, 14 May 2015 23:55:45 +0000 (-0700)
Subject: rcutorture: Bounds-check rcutorture.shuffle_interval
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e8e255f7191fb6491dd1d96cfbbe19981f6eb3dd;p=linux-beck.git

rcutorture: Bounds-check rcutorture.shuffle_interval

Specifying a negative rcutorture.shuffle_interval value will cause a
negative value to be used as a sleep time.  This commit therefore
refuses to start shuffling unless the rcutorture.shuffle_interval
value is greater than zero.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 2cbe569ac5dd..1cead7806ca6 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1821,7 +1821,7 @@ rcu_torture_init(void)
 		if (firsterr)
 			goto unwind;
 	}
-	if (test_no_idle_hz) {
+	if (test_no_idle_hz && shuffle_interval > 0) {
 		firsterr = torture_shuffle_init(shuffle_interval * HZ);
 		if (firsterr)
 			goto unwind;