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Message-ID: <20130128033047.GA3024@udknight> Date: Mon, 28 Jan 2013 11:30:47 +0800 From: Wang YanQing <udknight@...il.com> To: mingo@...nel.org Cc: torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org, akpm@...ux-foundation.org, hpa@...or.com, paulmck@...ux.vnet.ibm.com, stable@...nel.org, tglx@...utronix.de Subject: [PATCH] smp:Fix use un-initialized cpumask_ipi c7b798525b50256c8084215a139fa40b0114bfcc [smp: Fix SMP function call empty cpu mask race] use the un-initialized variable cpumask_ipi when enable CONFIG_CPUMASK_OFFSTACK. Signed-off-by: Wang YanQing <udknight@...il.com> --- I am sorry for miss it, I just think it when I was lying on the bed last night. :) kernel/smp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/smp.c b/kernel/smp.c index 7c56aba..a38aa18 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -57,6 +57,9 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu) if (!zalloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL, cpu_to_node(cpu))) return notifier_from_errno(-ENOMEM); + if (!zalloc_cpumask_var_node(&cfd->cpumask_ipi, GFP_KERNEL, + cpu_to_node(cpu))) + return notifier_from_errno(-ENOMEM); break; #ifdef CONFIG_HOTPLUG_CPU -- 1.7.11.1.116.g8228a23 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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