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Date: Thu, 22 Apr 2010 12:10:38 -0700 From: Greg KH <gregkh@...e.de> To: linux-kernel@...r.kernel.org, stable@...nel.org Cc: stable-review@...nel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk, Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>, Avi Kivity <avi@...hat.com> Subject: [187/197] KVM: SVM: Fix memory leaks that happen when svm_create_vcpu() fails 2.6.32-stable review patch. If anyone has any objections, please let us know. ------------------ From: Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp> (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 <yoshikawa.takuya@....ntt.co.jp> Signed-off-by: Avi Kivity <avi@...hat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de> --- arch/x86/kvm/svm.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -694,29 +694,28 @@ static struct kvm_vcpu *svm_create_vcpu( 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( 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: -- 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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