Commit 090eb578 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Greg Kroah-Hartman

rcuperf: Fix cleanup path for invalid perf_type strings

[ Upstream commit ad092c02 ]

If the specified rcuperf.perf_type is not in the rcu_perf_init()
function's perf_ops[] array, rcuperf prints some console messages and
then invokes rcu_perf_cleanup() to set state so that a future torture
test can run.  However, rcu_perf_cleanup() also attempts to end the
test that didn't actually start, and in doing so relies on the value
of cur_ops, a value that is not particularly relevant in this case.
This can result in confusing output or even follow-on failures due to
attempts to use facilities that have not been properly initialized.

This commit therefore sets the value of cur_ops to NULL in this case and
inserts a check near the beginning of rcu_perf_cleanup(), thus avoiding
relying on an irrelevant cur_ops value.
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 0b447e75
......@@ -453,6 +453,10 @@ rcu_perf_cleanup(void)
if (torture_cleanup_begin())
return;
if (!cur_ops) {
torture_cleanup_end();
return;
}
if (reader_tasks) {
for (i = 0; i < nrealreaders; i++)
......@@ -574,6 +578,7 @@ rcu_perf_init(void)
pr_alert(" %s", perf_ops[i]->name);
pr_alert("\n");
firsterr = -EINVAL;
cur_ops = NULL;
goto unwind;
}
if (cur_ops->init)
......
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