linux-kernel - [PATCH] x86: Plug memory leak in sparse irq

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Date:	Tue, 28 Sep 2010 20:57:19 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	LKML <linux-kernel@...r.kernel.org>
cc:	x86@...nel.org, Yinghai Lu <yhlu.kernel@...il.com>
Subject: [PATCH] x86: Plug memory leak in sparse irq

free_irq_cfg() is not freeing the cpumask_vars in irq_cfg.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...nel.org
---
 arch/x86/kernel/apic/io_apic.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/x86/kernel/apic/io_apic.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/io_apic.c
+++ linux-2.6/arch/x86/kernel/apic/io_apic.c
@@ -311,9 +311,11 @@ void arch_init_copy_chip_data(struct irq
 	init_copy_irq_2_pin(old_cfg, cfg, node);
 }
 
-static void free_irq_cfg(struct irq_cfg *old_cfg)
+static void free_irq_cfg(struct irq_cfg *cfg)
 {
-	kfree(old_cfg);
+	free_cpumask_var(cfg->domain);
+	free_cpumask_var(cfg->old_domain);
+	kfree(cfg);
 }
 
 void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc)
--
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