[Xen-changelog] [xen stable-4.2] x86/shadow: fix off-by-one in MMIO permission check

[patchbot@xxxxxxx]

commit 927fcee39803c4134d82d03d410bf90d76457d90
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu May 23 10:10:08 2013 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu May 23 10:10:08 2013 +0200

    x86/shadow: fix off-by-one in MMIO permission check
    
    iomem_access_permitted() wants an inclusive range as input.
    
    Also use pfn_to_paddr() in nearby code instead of open coding it.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Tim Deegan <tim@xxxxxxx>
    master commit: afa65ddfd88184a894d9364bec587554c28c20e0
    master date: 2013-05-15 14:34:05 +0200
---
 xen/arch/x86/mm/shadow/multi.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/mm/shadow/multi.c b/xen/arch/x86/mm/shadow/multi.c
index ca4a241..08a86a5 100644
--- a/xen/arch/x86/mm/shadow/multi.c
+++ b/xen/arch/x86/mm/shadow/multi.c
@@ -603,13 +603,13 @@ _sh_propagate(struct vcpu *v,
         else if ( d->arch.hvm_domain.is_in_uc_mode )
             sflags |= pat_type_2_pte_flags(PAT_TYPE_UNCACHABLE);
         else
-            if ( iomem_access_permitted(d, mfn_x(target_mfn), 
mfn_x(target_mfn) + 1) )
+            if ( iomem_access_permitted(d, mfn_x(target_mfn), 
mfn_x(target_mfn)) )
             {
                 if ( p2mt == p2m_mmio_direct )
                     sflags |= get_pat_flags(v,
                             gflags,
                             gfn_to_paddr(target_gfn),
-                            ((paddr_t)mfn_x(target_mfn)) << PAGE_SHIFT,
+                            pfn_to_paddr(mfn_x(target_mfn)),
                             MTRR_TYPE_UNCACHABLE); 
                 else if ( iommu_snoop )
                     sflags |= pat_type_2_pte_flags(PAT_TYPE_WRBACK);
@@ -617,7 +617,7 @@ _sh_propagate(struct vcpu *v,
                     sflags |= get_pat_flags(v,
                             gflags,
                             gfn_to_paddr(target_gfn),
-                            ((paddr_t)mfn_x(target_mfn)) << PAGE_SHIFT,
+                            pfn_to_paddr(mfn_x(target_mfn)),
                             NO_HARDCODE_MEM_TYPE);
             }
     }
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.2

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