libxml2/xmlAddChild-and-xmlAddNextSibling-may-not-attach-the.patch

105 lines
2.6 KiB
Diff

From 8f5ccada05ddd4a1ff8e399ad39fc7cd4bd33325 Mon Sep 17 00:00:00 2001
From: David Kilzer <ddkilzer@apple.com>
Date: Wed, 7 Jul 2021 19:24:36 -0700
Subject: [PATCH] xmlAddChild() and xmlAddNextSibling() may not attach their
second argument
Use the return value of xmlAddChild() and xmlAddNextSibling()
instead of the second argument directly.
Found by OSS-Fuzz.
Fixes #316
---
xinclude.c | 14 ++++++--------
xpointer.c | 13 ++++++-------
2 files changed, 12 insertions(+), 15 deletions(-)
diff --git a/xinclude.c b/xinclude.c
index b2e6ea1..2a0614d 100644
--- a/xinclude.c
+++ b/xinclude.c
@@ -1014,15 +1014,15 @@ xmlXIncludeCopyRange(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
if (list == NULL) {
list = tmp;
listParent = cur->parent;
+ last = tmp;
} else {
if (level == lastLevel)
- xmlAddNextSibling(last, tmp);
+ last = xmlAddNextSibling(last, tmp);
else {
- xmlAddChild(last, tmp);
+ last = xmlAddChild(last, tmp);
lastLevel = level;
}
}
- last = tmp;
if (index2 > 1) {
end = xmlXIncludeGetNthChild(cur, index2 - 1);
@@ -1103,12 +1103,11 @@ xmlXIncludeCopyRange(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
}
if (tmp != NULL) {
if (level == lastLevel)
- xmlAddNextSibling(last, tmp);
+ last = xmlAddNextSibling(last, tmp);
else {
- xmlAddChild(last, tmp);
+ last = xmlAddChild(last, tmp);
lastLevel = level;
}
- last = tmp;
}
}
/*
@@ -1186,8 +1185,7 @@ xmlXIncludeCopyXPointer(xmlXIncludeCtxtPtr ctxt, xmlDocPtr target,
if (last == NULL) {
list = last = tmp;
} else {
- xmlAddNextSibling(last, tmp);
- last = tmp;
+ last = xmlAddNextSibling(last, tmp);
}
cur = cur->next;
continue;
diff --git a/xpointer.c b/xpointer.c
index 27a6a8c..fe2fca5 100644
--- a/xpointer.c
+++ b/xpointer.c
@@ -1483,16 +1483,16 @@ xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) {
return(list);
} else {
tmp = xmlCopyNode(cur, 0);
- if (list == NULL)
+ if (list == NULL) {
list = tmp;
- else {
+ parent = tmp;
+ } else {
if (last != NULL)
- xmlAddNextSibling(last, tmp);
+ parent = xmlAddNextSibling(last, tmp);
else
- xmlAddChild(parent, tmp);
+ parent = xmlAddChild(parent, tmp);
}
last = NULL;
- parent = tmp;
if (index2 > 1) {
end = xmlXPtrGetNthChild(cur, index2 - 1);
@@ -1574,8 +1574,7 @@ xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) {
if (last != NULL)
xmlAddNextSibling(last, tmp);
else {
- xmlAddChild(parent, tmp);
- last = tmp;
+ last = xmlAddChild(parent, tmp);
}
}
}
--
1.8.3.1