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KVM: x86/xen: Fix get_attr of KVM_XEN_ATTR_TYPE_SHARED_INFO

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commit 4e8436479a upstream.

In commit 319afe6856 ("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@vger.kernel.org
Fixes: 319afe6856 ("KVM: xen: do not use struct gfn_to_hva_cache")
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20211115165030.7422-2-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Woodhouse 2021-11-15 16:50:21 +00:00 committed by Greg Kroah-Hartman
parent b22ef13e8e
commit c897c53642
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/xen.c
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@ -299,7 +299,7 @@ int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data)
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;