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hc
2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf 
 kernel/net/netfilter/nf_conntrack_helper.c
....@@ -404,6 +404,9 @@
404404 	BUG_ON(me->expect_class_max >= NF_CT_MAX_EXPECT_CLASSES);
405405 	BUG_ON(strlen(me->name) > NF_CT_HELPER_NAME_LEN - 1);
406406 
407
+	if (!nf_ct_helper_hash)
408
+		return -ENOENT;
409
+
407410 	if (me->expect_policy->max_expected > NF_CT_EXPECT_MAX_CNT)
408411 		return -EINVAL;
409412 
....@@ -587,4 +590,5 @@
587590 {
588591 	nf_ct_extend_unregister(&helper_extend);
589592 	kvfree(nf_ct_helper_hash);
593
+	nf_ct_helper_hash = NULL;
590594 }