rcutorture: Fix rcu_torture_cbflood() for callback-free RCU (3a0af333) · Commits · 戴 / test

The rcu_torture_cbflood() function correctly checks for flavors of RCU that lack analogs to call_rcu() and rcu_barrier(), but in that case it fails to terminate correctly. In fact, it terminates so incorrectly that segfaults can result. This commit therefore causes rcu_torture_cbflood() to do the proper wait-for-stop procedure. Signed-off-by:

Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/rcutorture.c

+2 −3

Original line number	Diff line number	Diff line
		@@ -823,9 +823,7 @@ rcu_torture_cbflood(void *arg)
		}
		if (err) {
		VERBOSE_TOROUT_STRING("rcu_torture_cbflood disabled: Bad args or OOM");
		while (!torture_must_stop())
		schedule_timeout_interruptible(HZ);
		return 0;
		goto wait_for_stop;
		}
		VERBOSE_TOROUT_STRING("rcu_torture_cbflood task started");
		do {
		@@ -844,6 +842,7 @@ rcu_torture_cbflood(void *arg)
		stutter_wait("rcu_torture_cbflood");
		} while (!torture_must_stop());
		vfree(rhp);
		wait_for_stop:
		torture_kthread_stopping("rcu_torture_cbflood");
		return 0;
		}

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