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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-03-21 09:27:28 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-31 06:46:30 -0700 |
| commit | aa7919e37fee531f6027a3b67f102f9c9fde03bb (patch) | |
| tree | ed6ecc4f5a17fb29aaff746eab7b6f456d090b9a | |
| parent | 3d036cbaab922bc261f6228fe8202ee6b0c10bb9 (diff) | |
| download | linux-stable-aa7919e37fee531f6027a3b67f102f9c9fde03bb.tar.gz | |
rcutorture: Fix cleanup path for invalid torture_type strings
[ Upstream commit b813afae7ab6a5e91b4e16cc567331d9c2ae1f04 ]
If the specified rcutorture.torture_type is not in the rcu_torture_init()
function's torture_ops[] array, rcutorture prints some console messages
and then invokes rcu_torture_cleanup() to set state so that a future
torture test can run. However, rcu_torture_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_torture_cleanup(),
thus avoiding relying on an irrelevant cur_ops value.
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index c596c6f1e457..0b7af7e2bcbb 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1826,6 +1826,10 @@ rcu_torture_cleanup(void) cur_ops->cb_barrier(); return; } + if (!cur_ops) { + torture_cleanup_end(); + return; + } rcu_torture_barrier_cleanup(); torture_stop_kthread(rcu_torture_stall, stall_task); @@ -1964,6 +1968,7 @@ rcu_torture_init(void) pr_cont(" %s", torture_ops[i]->name); pr_cont("\n"); firsterr = -EINVAL; + cur_ops = NULL; goto unwind; } if (cur_ops->fqs == NULL && fqs_duration != 0) { |