1 files changed, 0 insertions, 52 deletions
diff --git a/system/xen/xsa/xsa227.patch b/system/xen/xsa/xsa227.patch
deleted file mode 100644
index 86aa41e2d4..0000000000
--- a/system/xen/xsa/xsa227.patch
+++ /dev/null
@@ -1,52 +0,0 @@
-From fa7268b94f8a0a7792ee12d5b8e23a60e52a3a84 Mon Sep 17 00:00:00 2001
-From: Andrew Cooper <andrew.cooper3@citrix.com>
-Date: Tue, 20 Jun 2017 19:18:54 +0100
-Subject: [PATCH] x86/grant: Disallow misaligned PTEs
-
-Pagetable entries must be aligned to function correctly.  Disallow attempts
-from the guest to have a grant PTE created at a misaligned address, which
-would result in corruption of the L1 table with largely-guest-controlled
-values.
-
-This is XSA-227
-
-Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
-Reviewed-by: Jan Beulich <jbeulich@suse.com>
----
- xen/arch/x86/mm.c | 13 +++++++++++++
- 1 file changed, 13 insertions(+)
-
-diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
-index 97b3b4b..00f517a 100644
---- a/xen/arch/x86/mm.c
-+++ b/xen/arch/x86/mm.c
-@@ -3763,6 +3763,9 @@ static int create_grant_pte_mapping(
-     l1_pgentry_t ol1e;
-     struct domain *d = v->domain;
- 
-+    if ( !IS_ALIGNED(pte_addr, sizeof(nl1e)) )
-+        return GNTST_general_error;
-+
-     adjust_guest_l1e(nl1e, d);
- 
-     gmfn = pte_addr >> PAGE_SHIFT;
-@@ -3819,6 +3822,16 @@ static int destroy_grant_pte_mapping(
-     struct page_info *page;
-     l1_pgentry_t ol1e;
- 
-+    /*
-+     * addr comes from Xen's active_entry tracking so isn't guest controlled,
-+     * but it had still better be PTE-aligned.
-+     */
-+    if ( !IS_ALIGNED(addr, sizeof(ol1e)) )
-+    {
-+        ASSERT_UNREACHABLE();
-+        return GNTST_general_error;
-+    }
-+
-     gmfn = addr >> PAGE_SHIFT;
-     page = get_page_from_gfn(d, gmfn, NULL, P2M_ALLOC);
- 
--- 
-2.1.4
-