File 19653-hvm-vcpuid-range-checks.patch of Package xen

# HG changeset patch
# User Keir Fraser <keir.fraser@citrix.com>
# Date 1243419460 -3600
# Node ID b671d568115f69d2ab223e9b71b6f8241a7dc1f9
# Parent  7dfc0a20fa598287e61b64d93ff6671e2c649e9a
x86/hvm: fix off-by-one errors in vcpuid range checks

Signed-off-by: Jan Beulich <jbeulich@novell.com>

--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -491,7 +491,7 @@ static int hvm_load_cpu_ctxt(struct doma
 
     /* Which vcpu is this? */
     vcpuid = hvm_load_instance(h);
-    if ( vcpuid > MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL ) 
+    if ( vcpuid >= MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL )
     {
         gdprintk(XENLOG_ERR, "HVM restore: domain has no vcpu %u\n", vcpuid);
         return -EINVAL;
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -667,7 +667,7 @@ static int hvm_load_mtrr_msr(struct doma
     struct hvm_hw_mtrr hw_mtrr;
 
     vcpuid = hvm_load_instance(h);
-    if ( vcpuid > MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL )
+    if ( vcpuid >= MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL )
     {
         gdprintk(XENLOG_ERR, "HVM restore: domain has no vcpu %u\n", vcpuid);
         return -EINVAL;
--- a/xen/arch/x86/hvm/vlapic.c
+++ b/xen/arch/x86/hvm/vlapic.c
@@ -911,7 +911,7 @@ static int lapic_load_hidden(struct doma
     
     /* Which vlapic to load? */
     vcpuid = hvm_load_instance(h); 
-    if ( vcpuid > MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL ) 
+    if ( vcpuid >= MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL )
     {
         gdprintk(XENLOG_ERR, "HVM restore: domain has no vlapic %u\n", vcpuid);
         return -EINVAL;
@@ -934,7 +934,7 @@ static int lapic_load_regs(struct domain
     
     /* Which vlapic to load? */
     vcpuid = hvm_load_instance(h); 
-    if ( vcpuid > MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL ) 
+    if ( vcpuid >= MAX_VIRT_CPUS || (v = d->vcpu[vcpuid]) == NULL )
     {
         gdprintk(XENLOG_ERR, "HVM restore: domain has no vlapic %u\n", vcpuid);
         return -EINVAL;