smp:Fix use un-initialized cpumask_ipi

PATCH RESEND Superseded Wang YanQing 1 participant 1 message Jan 28, 2013

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Wang YanQing

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2013-01-28 04:49 UTC #0 lore raw

PATCH RESEND 1/1 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 <[email protected]>

---
I am sorry for miss it first.

 kernel/smp.c | 4 ++++
 1 file changed, 4 insertions(+)

kernel/smp.c +4 -0

index 7c56aba..af86f5e 100644
@@ -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_ini);
 		break;
 #endif
 	};

Signature · 1 line

1.7.11.1.116.g8228a23