diff options
Diffstat (limited to 'kvm-fix-page-struct-leak-in-handle_vmon.patch')
| -rw-r--r-- | kvm-fix-page-struct-leak-in-handle_vmon.patch | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/kvm-fix-page-struct-leak-in-handle_vmon.patch b/kvm-fix-page-struct-leak-in-handle_vmon.patch deleted file mode 100644 index b29bcea03..000000000 --- a/kvm-fix-page-struct-leak-in-handle_vmon.patch +++ /dev/null @@ -1,49 +0,0 @@ -From patchwork Tue Jan 24 10:56:21 2017 -Content-Type: text/plain; charset="utf-8" -MIME-Version: 1.0 -Content-Transfer-Encoding: 7bit -Subject: kvm: fix page struct leak in handle_vmon -From: Paolo Bonzini <pbonzini@redhat.com> -X-Patchwork-Id: 9534885 -Message-Id: <1485255381-18069-1-git-send-email-pbonzini@redhat.com> -To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org -Cc: dvyukov@google.com -Date: Tue, 24 Jan 2017 11:56:21 +0100 - -handle_vmon gets a reference on VMXON region page, -but does not release it. Release the reference. - -Found by syzkaller; based on a patch by Dmitry. - -Reported-by: Dmitry Vyukov <dvyukov@google.com> -Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> -Reviewed-by: David Hildenbrand <david@redhat.com> ---- - arch/x86/kvm/vmx.c | 9 +++++++-- - 1 file changed, 7 insertions(+), 2 deletions(-) - -diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c -index 42cc3d6f4d20..0f7345035210 100644 ---- a/arch/x86/kvm/vmx.c -+++ b/arch/x86/kvm/vmx.c -@@ -7085,13 +7085,18 @@ static int nested_vmx_check_vmptr(struct kvm_vcpu *vcpu, int exit_reason, - } - - page = nested_get_page(vcpu, vmptr); -- if (page == NULL || -- *(u32 *)kmap(page) != VMCS12_REVISION) { -+ if (page == NULL) { - nested_vmx_failInvalid(vcpu); -+ return kvm_skip_emulated_instruction(vcpu); -+ } -+ if (*(u32 *)kmap(page) != VMCS12_REVISION) { - kunmap(page); -+ nested_release_page_clean(page); -+ nested_vmx_failInvalid(vcpu); - return kvm_skip_emulated_instruction(vcpu); - } - kunmap(page); -+ nested_release_page_clean(page); - vmx->nested.vmxon_ptr = vmptr; - break; - case EXIT_REASON_VMCLEAR: |