This is a note to let you know that I've just added the patch titled
KVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO
to the 5.15-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-xen-fix-get_attr-of-kvm_xen_attr_type_shared_info.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4e8436479ad3be76a3823e6ce466ae464ce71300 Mon Sep 17 00:00:00 2001
From: David Woodhouse <dwmw@xxxxxxxxxxxx>
Date: Mon, 15 Nov 2021 16:50:21 +0000
Subject: KVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO
From: David Woodhouse <dwmw@xxxxxxxxxxxx>
commit 4e8436479ad3be76a3823e6ce466ae464ce71300 upstream.
In commit 319afe68567b ("KVM: xen: do not use struct gfn_to_hva_cache") we
stopped storing this in-kernel as a GPA, and started storing it as a GFN.
Which means we probably should have stopped calling gpa_to_gfn() on it
when userspace asks for it back.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 319afe68567b ("KVM: xen: do not use struct gfn_to_hva_cache")
Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Message-Id: <20211115165030.7422-2-dwmw2@xxxxxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/xen.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kvm/xen.c
+++ b/arch/x86/kvm/xen.c
@@ -299,7 +299,7 @@ int kvm_xen_hvm_get_attr(struct kvm *kvm
break;
case KVM_XEN_ATTR_TYPE_SHARED_INFO:
- data->u.shared_info.gfn = gpa_to_gfn(kvm->arch.xen.shinfo_gfn);
+ data->u.shared_info.gfn = kvm->arch.xen.shinfo_gfn;
r = 0;
break;
Patches currently in stable-queue which might be from dwmw@xxxxxxxxxxxx are
queue-5.15/kvm-x86-xen-fix-get_attr-of-kvm_xen_attr_type_shared_info.patch
