File pacemaker-libcrmcommon-xml-comments-v2-diffs.patch of Package pacemaker.14737

commit b7fa323267388eb4e1c2a90c57d736a04d76060c
Author: Ken Gaillot <kgaillot@redhat.com>
Date:   Thu Jul 7 10:55:44 2016 -0500

    Fix: libcrmcommon: properly handle XML comments when comparing v2 patchset diffs
    
    This bug existed since v2 patchsets were created, but did not result in any
    known problematic behavior until 1073786e exercised the code differently,
    at which point the crmd could get into an infinite election loop when there is
    more than one comment at the same level within a CIB XML element, the partition
    has only one node, and the partition does not yet have a DC.
    
    It is also possible that ACLs could be bypassed in some cases when changing
    only comments.

diff --git a/lib/common/xml.c b/lib/common/xml.c
index 11be300..7791e21 100644
--- a/lib/common/xml.c
+++ b/lib/common/xml.c
@@ -4284,15 +4284,13 @@ __xml_diff_object(xmlNode * old, xmlNode * new)
 
     for (cIter = __xml_first_child(old); cIter != NULL; ) {
         xmlNode *old_child = cIter;
-        xmlNode *new_child = find_entity(new, crm_element_name(cIter), ID(cIter));
+        xmlNode *new_child = find_element(new, cIter);
 
         cIter = __xml_next(cIter);
         if(new_child) {
             __xml_diff_object(old_child, new_child);
 
         } else {
-            xml_private_t *p = old_child->_private;
-
             /* Create then free (which will check the acls if necessary) */
             xmlNode *candidate = add_node_copy(new, old_child);
             xmlNode *top = xmlDocGetRootElement(candidate->doc);
@@ -4301,7 +4299,9 @@ __xml_diff_object(xmlNode * old, xmlNode * new)
             __xml_acl_apply(top); /* Make sure any ACLs are applied to 'candidate' */
             free_xml(candidate);
 
-            if(NULL == find_entity(new, crm_element_name(old_child), ID(old_child))) {
+            if (find_element(new, old_child) == NULL) {
+                xml_private_t *p = old_child->_private;
+
                 p->flags |= xpf_skip;
             }
         }
@@ -4309,7 +4309,7 @@ __xml_diff_object(xmlNode * old, xmlNode * new)
 
     for (cIter = __xml_first_child(new); cIter != NULL; ) {
         xmlNode *new_child = cIter;
-        xmlNode *old_child = find_entity(old, crm_element_name(cIter), ID(cIter));
+        xmlNode *old_child = find_element(old, cIter);
 
         cIter = __xml_next(cIter);
         if(old_child == NULL) {
@@ -4321,9 +4321,10 @@ __xml_diff_object(xmlNode * old, xmlNode * new)
             /* Check for movement, we already checked for differences */
             int p_new = __xml_offset(new_child);
             int p_old = __xml_offset(old_child);
-            xml_private_t *p = new_child->_private;
 
             if(p_old != p_new) {
+                xml_private_t *p = new_child->_private;
+
                 crm_info("%s.%s moved from %d to %d",
                          new_child->name, ID(new_child), p_old, p_new);
                 __xml_node_dirty(new);
@@ -4331,12 +4332,10 @@ __xml_diff_object(xmlNode * old, xmlNode * new)
 
                 if(p_old > p_new) {
                     p = old_child->_private;
-                    p->flags |= xpf_skip;
-
                 } else {
                     p = new_child->_private;
-                    p->flags |= xpf_skip;
                 }
+                p->flags |= xpf_skip;
             }
         }
     }