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Date: Sat, 17 Apr 2010 16:41:47 +0800 From: Lai Jiangshan <laijs@...fujitsu.com> To: Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>, LKML <linux-kernel@...r.kernel.org>, kvm-owner@...r.kernel.org Subject: [PATCH] kvm vmx: free vpid when fail to create vcpu Fix bug of the exception path, free allocated vpid when fail to create vcpu. Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com> --- diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 686492e..077cac5 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2290,6 +2290,16 @@ static void allocate_vpid(struct vcpu_vmx *vmx) spin_unlock(&vmx_vpid_lock); } +static void free_vpid(struct vcpu_vmx *vmx) +{ + if (!enable_vpid) + return; + spin_lock(&vmx_vpid_lock); + if (vmx->vpid != 0) + __clear_bit(vmx->vpid, vmx_vpid_bitmap); + spin_unlock(&vmx_vpid_lock); +} + static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap, u32 msr) { int f = sizeof(unsigned long); @@ -3915,10 +3925,7 @@ static void vmx_free_vcpu(struct kvm_vcpu *vcpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); - spin_lock(&vmx_vpid_lock); - if (vmx->vpid != 0) - __clear_bit(vmx->vpid, vmx_vpid_bitmap); - spin_unlock(&vmx_vpid_lock); + free_vpid(vmx); vmx_free_vmcs(vcpu); kfree(vmx->guest_msrs); kvm_vcpu_uninit(vcpu); @@ -3980,6 +3987,7 @@ free_msrs: uninit_vcpu: kvm_vcpu_uninit(&vmx->vcpu); free_vcpu: + free_vpid(vmx); kmem_cache_free(kvm_vcpu_cache, vmx); return ERR_PTR(err); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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