[PATCH AUTOSEL 5.4 044/109] workqueue: Fix possible memory leaks in wq_numa_init()
From: Sasha Levin <sashal@kernel.org>
Date: 2021-09-09 12:55:13
Also in:
lkml
Subsystem:
the rest, workqueue · Maintainers:
Linus Torvalds, Tejun Heo
From: Zhen Lei <redacted> [ 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 <redacted> Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- kernel/workqueue.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 6aeb53b4e19f..885d4792abdf 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c@@ -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]); }
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2.30.2