This is a note to let you know that I've just added the patch titled
KVM: MMU: fix CR4.SMEP=1, CR0.WP=0 with shadow pages
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-mmu-fix-cr4.smep-1-cr0.wp-0-with-shadow-pages.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 898761158be7682082955e3efa4ad24725305fc7 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Thu, 2 Apr 2015 11:04:05 +0200
Subject: KVM: MMU: fix CR4.SMEP=1, CR0.WP=0 with shadow pages
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
commit 898761158be7682082955e3efa4ad24725305fc7 upstream.
smep_andnot_wp is initialized in kvm_init_shadow_mmu and shadow pages
should not be reused for different values of it. Thus, it has to be
added to the mask in kvm_mmu_pte_write.
Reviewed-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4078,7 +4078,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *
++vcpu->kvm->stat.mmu_pte_write;
kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE);
- mask.cr0_wp = mask.cr4_pae = mask.nxe = 1;
+ mask.cr0_wp = mask.cr4_pae = mask.nxe = mask.smep_andnot_wp = 1;
for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn) {
if (detect_write_misaligned(sp, gpa, bytes) ||
detect_write_flooding(sp)) {
Patches currently in stable-queue which might be from pbonzini@xxxxxxxxxx are
queue-3.14/kvm-mmu-fix-cr4.smep-1-cr0.wp-0-with-shadow-pages.patch
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