linux-kernel - [PATCH 07/20] KVM: ia64: destroy ioapic device if fail to setup default irq routing

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Date:	Wed, 17 Feb 2010 15:45:17 +0200
From:	Avi Kivity <avi@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 07/20] KVM: ia64: destroy ioapic device if fail to setup default irq routing

From: Wei Yongjun <yjwei@...fujitsu.com>

If KVM_CREATE_IRQCHIP fail due to kvm_setup_default_irq_routing(),
ioapic device is not destroyed and kvm->arch.vioapic is not set to
NULL, this may cause KVM_GET_IRQCHIP and KVM_SET_IRQCHIP access to
unexcepted memory.

Signed-off-by: Wei Yongjun <yjwei@...fujitsu.com>
Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/ia64/kvm/kvm-ia64.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 0618898..26e0e08 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -968,7 +968,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
 			goto out;
 		r = kvm_setup_default_irq_routing(kvm);
 		if (r) {
-			kfree(kvm->arch.vioapic);
+			kvm_ioapic_destroy(kvm);
 			goto out;
 		}
 		break;
-- 
1.6.5.3

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