[PATCH nft 1/5] rule: skip fuzzy lookup if object name is not available

[Pablo Neira Ayuso <pablo@netfilter.org>]

Skip fuzzy lookup for suggestions when handles are used.

Note that 4cf97abfee61 ("rule: Avoid segfault with anonymous chains")
already skips it for chain.

Fixes: 285bb67a11ad ("src: introduce simple hints on incorrect set")
Fixes: 9f7817a4e022 ("src: introduce simple hints on incorrect chain")
Fixes: d7476ddd5f7d ("src: introduce simple hints on incorrect table")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/rule.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/rule.c b/src/rule.c
index 80315837baf0..a5a668f9992c 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -211,6 +211,9 @@ struct set *set_lookup_fuzzy(const char *set_name,
 	struct table *table;
 	struct set *set;
 
+	if (!set_name)
+		return NULL;
+
 	string_misspell_init(&st);
 
 	list_for_each_entry(table, &cache->table_cache.list, cache.list) {
@@ -1214,6 +1217,9 @@ struct table *table_lookup_fuzzy(const struct handle *h,
 	struct string_misspell_state st;
 	struct table *table;
 
+	if (!h->table.name)
+		return NULL;
+
 	string_misspell_init(&st);
 
 	list_for_each_entry(table, &cache->table_cache.list, cache.list) {
@@ -1696,6 +1702,9 @@ struct obj *obj_lookup_fuzzy(const char *obj_name,
 	struct table *table;
 	struct obj *obj;
 
+	if (!obj_name)
+		return NULL;
+
 	string_misspell_init(&st);
 
 	list_for_each_entry(table, &cache->table_cache.list, cache.list) {
@@ -2191,6 +2200,9 @@ struct flowtable *flowtable_lookup_fuzzy(const char *ft_name,
 	struct table *table;
 	struct flowtable *ft;
 
+	if (!ft_name)
+		return NULL;
+
 	string_misspell_init(&st);
 
 	list_for_each_entry(table, &cache->table_cache.list, cache.list) {
-- 
2.30.2