mailmap: xcalloc mailmap_info

This is to avoid reaching free of uninitialized members.

With an invalid .mailmap (and perhaps in other cases), it can reach
free(mi->name) with garbage for example.

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/mailmap.c b/mailmap.c
index f12bb45a3f734e48f003a7a2943d168c26778603..4892d497343a2d04812e331b379af2f8403db139 100644 (file)
--- a/mailmap.c
+++ b/mailmap.c
@@ -61,8 +61,7 @@ static void add_mapping(struct string_list *map,
        } else {
                /* create mailmap entry */
                struct string_list_item *item = string_list_insert_at_index(index, old_email, map);
-               item->util = xmalloc(sizeof(struct mailmap_entry));
-               memset(item->util, 0, sizeof(struct mailmap_entry));
+               item->util = xcalloc(1, sizeof(struct mailmap_entry));
                ((struct mailmap_entry *)item->util)->namemap.strdup_strings = 1;
        }
        me = (struct mailmap_entry *)map->items[index].util;
@@ -77,7 +76,7 @@ static void add_mapping(struct string_list *map,
                if (new_email)
                        me->email = xstrdup(new_email);
        } else {
-               struct mailmap_info *mi = xmalloc(sizeof(struct mailmap_info));
+               struct mailmap_info *mi = xcalloc(1, sizeof(struct mailmap_info));
                debug_mm("mailmap: adding (complex) entry for %s at index %d\n", old_email, index);
                if (new_name)
                        mi->name = xstrdup(new_name);