From: Xiao Guangrong <[email protected]> We should flush all tlbs after drop spte on sync_page path since
Quote from Avi: | sync_page | drop_spte | kvm_mmu_notifier_invalidate_page | kvm_unmap_rmapp | spte doesn't exist -> no flush | page is freed | guest can write into freed page? KVM-Stable-Tag. Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 590bf12..ca0e5e8 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -786,6 +786,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, else nonpresent = shadow_notrap_nonpresent_pte; drop_spte(vcpu->kvm, &sp->spt[i], nonpresent); + kvm_flush_remote_tlbs(vcpu->kvm); continue; } -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
