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

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Date:	Sat, 11 Jul 2015 17:52:29 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Chris Metcalf <cmetcalf@...hip.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Don Zickus <dzickus@...hat.com>,
	Ulrich Obergfell <uobergfe@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 1/4] smpboot: Fix memory leak on error handling

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

Reviewed-by: Chris Metcalf <cmetcalf@...hip.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Chris Metcalf <cmetcalf@...hip.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ulrich Obergfell <uobergfe@...hat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 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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