File libxc-sr-use-xc_is_known_page_type.patch of Package xen.30241

From: Olaf Hering <olaf@aepfle.de>
Date: Wed, 28 Oct 2020 14:29:50 +0100
Subject: libxc sr use xc_is_known_page_type

tools: use xc_is_known_page_type

Verify pfn type on sending side, also verify incoming batch of pfns.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
---
 tools/libxc/xc_sr_restore.c | 3 +--
 tools/libxc/xc_sr_save.c    | 6 ++++++
 2 files changed, 7 insertions(+), 2 deletions(-)

--- xen-4.14.0-testing.orig/tools/libxc/xc_sr_restore.c
+++ xen-4.14.0-testing/tools/libxc/xc_sr_restore.c
@@ -406,8 +406,7 @@ static int handle_page_data(struct xc_sr
         }
 
         type = (pages->pfn[i] & PAGE_DATA_TYPE_MASK) >> 32;
-        if ( ((type >> XEN_DOMCTL_PFINFO_LTAB_SHIFT) >= 5) &&
-             ((type >> XEN_DOMCTL_PFINFO_LTAB_SHIFT) <= 8) )
+        if ( xc_is_known_page_type(type) == false )
         {
             ERROR("Invalid type %#"PRIx32" for pfn %#"PRIpfn" (index %u)",
                   type, pfn, i);
--- xen-4.14.0-testing.orig/tools/libxc/xc_sr_save.c
+++ xen-4.14.0-testing/tools/libxc/xc_sr_save.c
@@ -147,6 +147,12 @@ static int write_batch(struct xc_sr_cont
 
     for ( i = 0; i < nr_pfns; ++i )
     {
+        if ( xc_is_known_page_type(types[i]) == false )
+        {
+            ERROR("Wrong type %#"PRIpfn" for pfn %#"PRIpfn, types[i], mfns[i]);
+            goto err;
+        }
+
         switch ( types[i] )
         {
         case XEN_DOMCTL_PFINFO_BROKEN: