[PATCH 1/4] smpboot: Fix memory leak on error handling

[Frederic Weisbecker]

The cpumask is allocated before threads get created. If the latter step
fails, we need to free the cpumask.

Reviewed-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
 kernel/smpboot.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index 7c434c3..71aa90b 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -301,6 +301,7 @@ int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread)
 		ret = __smpboot_create_thread(plug_thread, cpu);
 		if (ret) {
 			smpboot_destroy_threads(plug_thread);
+			free_cpumask_var(plug_thread->cpumask);
 			goto out;
 		}
 		smpboot_unpark_thread(plug_thread, cpu);
-- 
2.1.4

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