From 764a47273a858ebd62e560430af19aeed6abcb85 Mon Sep 17 00:00:00 2001 From: Takuya Yoshikawa Date: Tue, 9 Mar 2010 14:55:19 +0900 Subject: [PATCH] KVM: SVM: Fix memory leaks that happen when svm_create_vcpu() fails (Cherry-picked from commit b7af40433870aa0636932ad39b0c48a0cb319057) svm_create_vcpu() does not free the pages allocated during the creation when it fails to complete the allocations. This patch fixes it. Signed-off-by: Takuya Yoshikawa Signed-off-by: Avi Kivity Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/svm.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 7e5bebeee2fe..8e65552aa61e 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -694,29 +694,28 @@ static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) if (err) goto free_svm; + err = -ENOMEM; page = alloc_page(GFP_KERNEL); - if (!page) { - err = -ENOMEM; + if (!page) goto uninit; - } - err = -ENOMEM; msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); if (!msrpm_pages) - goto uninit; + goto free_page1; nested_msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER); if (!nested_msrpm_pages) - goto uninit; - - svm->msrpm = page_address(msrpm_pages); - svm_vcpu_init_msrpm(svm->msrpm); + goto free_page2; hsave_page = alloc_page(GFP_KERNEL); if (!hsave_page) - goto uninit; + goto free_page3; + svm->nested.hsave = page_address(hsave_page); + svm->msrpm = page_address(msrpm_pages); + svm_vcpu_init_msrpm(svm->msrpm); + svm->nested.msrpm = page_address(nested_msrpm_pages); svm->vmcb = page_address(page); @@ -733,6 +732,12 @@ static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) return &svm->vcpu; +free_page3: + __free_pages(nested_msrpm_pages, MSRPM_ALLOC_ORDER); +free_page2: + __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER); +free_page1: + __free_page(page); uninit: kvm_vcpu_uninit(&svm->vcpu); free_svm: -- 2.34.1