Messages in this thread Patch in this message | | | Date | Mon, 28 Jan 2013 12:59:28 +0800 | From | Wang YanQing <> | Subject | [PATCH Resend Resend] smp:Fix use un-initialized cpumask_ipi |
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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 first.
kernel/smp.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/smp.c b/kernel/smp.c index 7c56aba..af86f5e 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 @@ -66,6 +69,7 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu) case CPU_DEAD: case CPU_DEAD_FROZEN: free_cpumask_var(cfd->cpumask); + free_cpumask_var(cfd->cpumask_ipi); break; #endif }; -- 1.7.11.1.116.g8228a23
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