From: Wang YanQing <udknight@gmail.com>
To: mingo@kernel.org
Cc: torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-tip-commits@vger.kernel.org, akpm@linux-foundation.org,
hpa@zytor.com, paulmck@linux.vnet.ibm.com, stable@kernel.org,
tglx@linutronix.de
Subject: [PATCH] smp:Fix use un-initialized cpumask_ipi
Date: Mon, 28 Jan 2013 11:30:47 +0800 [thread overview]
Message-ID: <20130128033047.GA3024@udknight> (raw)
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@gmail.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
reply other threads:[~2013-01-28 3:30 UTC|newest]
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