[PATCH v2 08/13] libxenguest: fix off-by-1 in colo-secondary-bitmap merging

[Jan Beulich]

Valid GFNs (having a representation in the dirty bitmap) need to be
strictly below p2m_size.

Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>

--- a/tools/libs/guest/xg_sr_save.c
+++ b/tools/libs/guest/xg_sr_save.c
@@ -614,7 +614,7 @@ static int colo_merge_secondary_dirty_bi
     for ( i = 0; i < count; i++ )
     {
         pfn = pfns[i];
-        if ( pfn > ctx->save.p2m_size )
+        if ( pfn >= ctx->save.p2m_size )
         {
             PERROR("Invalid pfn 0x%" PRIx64, pfn);
             rc = -1;