Hi, After upgrading to 6.6.57 I noticed that my IPv6 firewall config failed to load. Quick investigation flagged NFLOG to be the issue: # ip6tables -I INPUT -j NFLOG Warning: Extension NFLOG revision 0 not supported, missing kernel module? ip6tables: No chain/target/match by that name. The regression is caused by the following commit: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?h=linux-6.6.y&id=997f67d813ce0cf5eb3cdb8f124da68141e91b6c More precisely, the bug is in the change below: +#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) + { + .name = "NFLOG", + .revision = 0, + .family = NFPROTO_IPV4, + .checkentry = nflog_tg_check, + .destroy = nflog_tg_destroy, + .target = nflog_tg, + .targetsize = sizeof(struct xt_nflog_info), + .me = THIS_MODULE, + }, +#endif Replacing NFPROTO_IPV4 with NFPROTO_IPV6 fixed the issue. Looking at the commit, it seems that at least one more target (MARK) may be also impacted: +#if IS_ENABLED(CONFIG_IP6_NF_IPTABLES) + { + .name = "MARK", + .revision = 2, + .family = NFPROTO_IPV4, + .target = mark_tg, + .targetsize = sizeof(struct xt_mark_tginfo2), + .me = THIS_MODULE, + }, +#endif The same errors seem to be present in the main tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0bfcb7b71e735560077a42847f69597ec7dcc326 I also suspect other -stable trees may be impacted by the same issue. Best regards, Krzysztof Olędzki
