From 4994684ce10924a0302567c315c91b0a64eeef46 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 18 Sep 2020 13:30:33 -0700 Subject: rcutorture: Prevent hangs for invalid arguments If an rcutorture torture-test run is given a bad kvm.sh argument, the test will complain to the console, which is good. What is bad is that from the user's perspective, it will just hang for the time specified by the --duration argument. This commit therefore forces an immediate kernel shutdown if a rcu_torture_init()-time error occurs, thus avoiding the appearance of a hang. It also forces a console splat in this case to clearly indicate the presence of an error. Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'kernel') diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 916ea4f66e4b..db3767110c60 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2647,7 +2647,6 @@ rcu_torture_init(void) for (i = 0; i < ARRAY_SIZE(torture_ops); i++) pr_cont(" %s", torture_ops[i]->name); pr_cont("\n"); - WARN_ON(!IS_MODULE(CONFIG_RCU_TORTURE_TEST)); firsterr = -EINVAL; cur_ops = NULL; goto unwind; @@ -2815,6 +2814,10 @@ rcu_torture_init(void) unwind: torture_init_end(); rcu_torture_cleanup(); + if (shutdown_secs) { + WARN_ON(!IS_MODULE(CONFIG_RCU_TORTURE_TEST)); + kernel_power_off(); + } return firsterr; } -- cgit v1.2.3-59-g8ed1b