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Bug 1071: Add NULL check in get_dom_node_list_index

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If the parent parameter of get_dom_node_list_index referred to a node
that did not have children, then get_dom_node_list called by it could
return the address of a null pointer, and get_dom_node_list_index would
then pass that null pointer to get_dom_node_list_pos, which would crash.
That would be the same kind of crash as the one in get_dom_node_child.
It never happened in practice though: because all calls are in the form
get_dom_node_list_index(node->parent, node), the list must contain at
least the given node, and the pointer cannot be null.  The documentation
of get_dom_node_list_index allows arbitrary nodes as arguments however,
so it's best to add a check.
This commit is contained in:
Kalle Olavi Niemitalo 2009-04-04 22:41:43 +03:00 committed by Kalle Olavi Niemitalo
parent 0c1a27ee99
commit b7f45ca80b
1 changed files with 1 additions and 1 deletions
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src/dom/node.c
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@ -247,7 +247,7 @@ get_dom_node_list_index(struct dom_node *parent, struct dom_node *node)
{ {
struct dom_node_list **list = get_dom_node_list(parent, node); struct dom_node_list **list = get_dom_node_list(parent, node);
return list ? get_dom_node_list_pos(*list, node) : -1; return (list && *list) ? get_dom_node_list_pos(*list, node) : -1;
} }
struct dom_node * struct dom_node *