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scftorture: Handle NULL argument passed to scf_add_to_free_list().

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Dan reported that after the rework the newly introduced
scf_add_to_free_list() may get a NULL pointer passed. This replaced
kfree() which was fine with a NULL pointer but scf_add_to_free_list()
isn't.

Let scf_add_to_free_list() handle NULL pointer.

Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/2375aa2c-3248-4ffa-b9b0-f0a24c50f237@stanley.mountain
Fixes: 4788c861ad ("scftorture: Use a lock-less list to free memory.")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Sebastian Andrzej Siewior 2024-11-12 17:20:23 +01:00 committed by Paul E. McKenney
parent 4788c861ad
commit f946cae86d
1 changed files with 2 additions and 0 deletions
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2
kernel/scftorture.c
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@ -155,6 +155,8 @@ static void scf_add_to_free_list(struct scf_check *scfcp)
struct llist_head *pool; struct llist_head *pool;
unsigned int cpu; unsigned int cpu;
if (!scfcp)
return;
cpu = raw_smp_processor_id() % nthreads; cpu = raw_smp_processor_id() % nthreads;
pool = &per_cpu(scf_free_pool, cpu); pool = &per_cpu(scf_free_pool, cpu);
llist_add(&scfcp->scf_node, pool); llist_add(&scfcp->scf_node, pool);