[Xen-changelog] [xen master] x86/HVM: adjust hvm_set_mem_pinned_cacheattr() error indications

[patchbot@xxxxxxx]

commit 0681fdbd36acfa314079804d3c30dc1c206e2685
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Mar 4 14:15:26 2016 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Mar 4 14:15:26 2016 +0100

    x86/HVM: adjust hvm_set_mem_pinned_cacheattr() error indications
    
    Make it return an error on bad domain kind or obviously bad GFN range.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/arch/x86/hvm/mtrr.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/mtrr.c b/xen/arch/x86/hvm/mtrr.c
index dc0bc88..80f868a 100644
--- a/xen/arch/x86/hvm/mtrr.c
+++ b/xen/arch/x86/hvm/mtrr.c
@@ -591,8 +591,11 @@ int32_t hvm_set_mem_pinned_cacheattr(
     struct hvm_mem_pinned_cacheattr_range *range;
     int rc = 1;
 
-    if ( !is_hvm_domain(d) || gfn_end < gfn_start )
-        return 0;
+    if ( !is_hvm_domain(d) )
+        return -EOPNOTSUPP;
+
+    if ( gfn_end < gfn_start || (gfn_start | gfn_end) >> paddr_bits )
+        return -EINVAL;
 
     if ( type == XEN_DOMCTL_DELETE_MEM_CACHEATTR )
     {
--
generated by git-patchbot for /home/xen/git/xen.git#master

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