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workqueue: Fix possible memory leaks in wq_numa_init() 

[ Upstream commit f728c4a9e8405caae69d4bc1232c54ff57b5d20f ]

In error handling branch "if (WARN_ON(node == NUMA_NO_NODE))", the
previously allocated memories are not released. Doing this before
allocating memory eliminates memory leaks.

tj: Note that the condition only occurs when the arch code is pretty broken
and the WARN_ON might as well be BUG_ON().

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhen Lei 2021-07-22 11:03:52 +08:00 committed by Greg Kroah-Hartman
parent 9b4f0170e0
commit b6cee35839
1 changed files with 7 additions and 5 deletions
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12
kernel/workqueue.c
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@ -5869,6 +5869,13 @@ static void __init wq_numa_init(void)
return;
}
for_each_possible_cpu(cpu) {
if (WARN_ON(cpu_to_node(cpu) == NUMA_NO_NODE)) {
pr_warn("workqueue: NUMA node mapping not available for cpu%d, disabling NUMA support\n", cpu);
return;
}
}
wq_update_unbound_numa_attrs_buf = alloc_workqueue_attrs();
BUG_ON(!wq_update_unbound_numa_attrs_buf);
@ -5886,11 +5893,6 @@ static void __init wq_numa_init(void)
for_each_possible_cpu(cpu) {
node = cpu_to_node(cpu);
if (WARN_ON(node == NUMA_NO_NODE)) {
pr_warn("workqueue: NUMA node mapping not available for cpu%d, disabling NUMA support\n", cpu);
/* happens iff arch is bonkers, let's just proceed */
return;
}
cpumask_set_cpu(cpu, tbl[node]);
}