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 <udkni...@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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
