--- zzzz-none-000/linux-3.18.24/net/ipv6/ip6mr.c	2015-10-31 20:39:51.000000000 +0000
+++ rtl96-5690pro-762/linux-3.18.24/net/ipv6/ip6mr.c	2024-08-14 08:36:37.000000000 +0000
@@ -1473,7 +1473,7 @@
 		if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
 		    ipv6_addr_equal(&c->mf6c_mcastgrp,
 				    &mfc->mf6cc_mcastgrp.sin6_addr) &&
-		    (parent == -1 || parent == mfc->mf6cc_parent)) {
+		    (parent == -1 || parent == c->mf6c_parent)) {
 			found = true;
 			break;
 		}