From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Thu, 14 May 2015 22:35:43 +0000 (-0700)
Subject: rcutorture: Better bounds checking for n_barrier_cbs
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d9eba768839ac24e47606af36e50c14f10c2211c;p=linux-beck.git

rcutorture: Better bounds checking for n_barrier_cbs

A negative value for rcutorture.n_barrier_cbs can pass a negative value
to the memory allocator, so this commit instead causes rcu_barrier()
testing to be disabled in this case.

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

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 59e32684c23b..7e29a3266139 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1507,7 +1507,7 @@ static int rcu_torture_barrier_init(void)
 	int i;
 	int ret;
 
-	if (n_barrier_cbs == 0)
+	if (n_barrier_cbs <= 0)
 		return 0;
 	if (cur_ops->call == NULL || cur_ops->cb_barrier == NULL) {
 		pr_alert("%s" TORTURE_FLAG