This is a note to let you know that I've just added the patch titled
KVM: x86/mmu: Check every prev_roots in __kvm_mmu_free_obsolete_roots()
to the 5.18-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-x86-mmu-check-every-prev_roots-in-__kvm_mmu_free_obsolete_roots.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cf4a8693d97a51dccf5a1557248d12d6d8be4b9e Mon Sep 17 00:00:00 2001
From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
Date: Mon, 6 Jun 2022 18:59:05 -0600
Subject: KVM: x86/mmu: Check every prev_roots in __kvm_mmu_free_obsolete_roots()
From: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
commit cf4a8693d97a51dccf5a1557248d12d6d8be4b9e upstream.
When freeing obsolete previous roots, check prev_roots as intended, not
the current root.
Signed-off-by: Shaoqin Huang <shaoqin.huang@xxxxxxxxx>
Fixes: 527d5cd7eece ("KVM: x86/mmu: Zap only obsolete roots if a root shadow page is zapped")
Message-Id: <20220607005905.2933378-1-shaoqin.huang@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/mmu/mmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5168,7 +5168,7 @@ static void __kvm_mmu_free_obsolete_root
roots_to_free |= KVM_MMU_ROOT_CURRENT;
for (i = 0; i < KVM_MMU_NUM_PREV_ROOTS; i++) {
- if (is_obsolete_root(kvm, mmu->root.hpa))
+ if (is_obsolete_root(kvm, mmu->prev_roots[i].hpa))
roots_to_free |= KVM_MMU_ROOT_PREVIOUS(i);
}
Patches currently in stable-queue which might be from shaoqin.huang@xxxxxxxxx are
queue-5.18/kvm-x86-mmu-check-every-prev_roots-in-__kvm_mmu_free_obsolete_roots.patch
