From be78d4a70de2aede3b9c4a644ce64c85141790cb Mon Sep 17 00:00:00 2001 From: Andrew Tridgell Date: Fri, 4 Dec 2009 17:46:14 +1100 Subject: s4-ldb: fixed show_deleted module not to corrupt parse trees The show_deleted module was using a static private ptr in the module to hold a parse tree to save on parsing. The code caused this static ptr to change with each search, which caused incorrect searches and numerous valgrind errors. This patch replaces it with a hand-built parse tree. --- source4/dsdb/samdb/ldb_modules/show_deleted.c | 49 ++++++++++++++------------- 1 file changed, 26 insertions(+), 23 deletions(-) (limited to 'source4/dsdb') diff --git a/source4/dsdb/samdb/ldb_modules/show_deleted.c b/source4/dsdb/samdb/ldb_modules/show_deleted.c index 557e36f0bd..11503e6d3b 100644 --- a/source4/dsdb/samdb/ldb_modules/show_deleted.c +++ b/source4/dsdb/samdb/ldb_modules/show_deleted.c @@ -40,7 +40,6 @@ static int show_deleted_search(struct ldb_module *module, struct ldb_request *re struct ldb_control *control; struct ldb_control **saved_controls; struct ldb_request *down_req; - struct ldb_parse_tree *nodeleted_tree; struct ldb_parse_tree *new_tree = req->op.search.tree; int ret; @@ -50,19 +49,33 @@ static int show_deleted_search(struct ldb_module *module, struct ldb_request *re control = ldb_request_get_control(req, LDB_CONTROL_SHOW_DELETED_OID); if (! control) { - nodeleted_tree = talloc_get_type(ldb_module_get_private(module), - struct ldb_parse_tree); - if (nodeleted_tree) { - new_tree = talloc(req, struct ldb_parse_tree); - if (!new_tree) { - ldb_oom(ldb); - return LDB_ERR_OPERATIONS_ERROR; - } - *new_tree = *nodeleted_tree; - /* Replace dummy part of 'and' with the old, tree, - without a parse step */ - new_tree->u.list.elements[0] = req->op.search.tree; + /* FIXME: we could use a constant tree here once we + are sure that no ldb modules modify trees + in-situ */ + new_tree = talloc(req, struct ldb_parse_tree); + if (!new_tree) { + ldb_oom(ldb); + return LDB_ERR_OPERATIONS_ERROR; } + new_tree->operation = LDB_OP_AND; + new_tree->u.list.num_elements = 2; + new_tree->u.list.elements = talloc_array(new_tree, struct ldb_parse_tree *, 2); + if (!new_tree->u.list.elements) { + ldb_oom(ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + new_tree->u.list.elements[0] = talloc(new_tree->u.list.elements, struct ldb_parse_tree); + new_tree->u.list.elements[0]->operation = LDB_OP_NOT; + new_tree->u.list.elements[0]->u.isnot.child = + talloc(new_tree->u.list.elements, struct ldb_parse_tree); + if (!new_tree->u.list.elements[0]->u.isnot.child) { + ldb_oom(ldb); + return LDB_ERR_OPERATIONS_ERROR; + } + new_tree->u.list.elements[0]->u.isnot.child->operation = LDB_OP_EQUALITY; + new_tree->u.list.elements[0]->u.isnot.child->u.equality.attr = "isDeleted"; + new_tree->u.list.elements[0]->u.isnot.child->u.equality.value = data_blob_string_const("TRUE"); + new_tree->u.list.elements[1] = req->op.search.tree; } ret = ldb_build_search_req_ex(&down_req, ldb, req, @@ -89,20 +102,10 @@ static int show_deleted_search(struct ldb_module *module, struct ldb_request *re static int show_deleted_init(struct ldb_module *module) { struct ldb_context *ldb; - struct ldb_parse_tree *nodeleted_tree; int ret; ldb = ldb_module_get_ctx(module); - nodeleted_tree = ldb_parse_tree(module, "(&(replace=me)(!(isDeleted=TRUE)))"); - if (!nodeleted_tree) { - ldb_debug(ldb, LDB_DEBUG_ERROR, - "show_deleted: Unable to parse isDeleted master expression!\n"); - return LDB_ERR_OPERATIONS_ERROR; - } - - ldb_module_set_private(module, nodeleted_tree); - ret = ldb_mod_register_control(module, LDB_CONTROL_SHOW_DELETED_OID); if (ret != LDB_SUCCESS) { ldb_debug(ldb, LDB_DEBUG_ERROR, -- cgit