xt_TEE.c needs nf_dup_ipv6.c to support ipv6 packet duplication. So that if xt_TEE is enabled, nf_dup_ipv6 will be automatically selected. But there is build failure scenario. test config: CONFIG_NETFILTER_XT_TARGET_TEE=y CONFIG_NF_DUP_IPV6=m compile result: net/netfilter/xt_TEE.o: In function `tee_tg6': net/netfilter/xt_TEE.c:57: undefined reference to `nf_dup_ipv6' This patch forces to avoid above config. Fixes: 5d400a4933e8 ("netfilter: Kconfig: Change select IPv6 dependencies") Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Reported-by: Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> Signed-off-by: Taehee Yoo <ap420073@xxxxxxxxx> --- net/netfilter/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig index 2ab870ef233a..a0c2712290ea 100644 --- a/net/netfilter/Kconfig +++ b/net/netfilter/Kconfig @@ -1011,7 +1011,7 @@ config NETFILTER_XT_TARGET_TEE depends on IPV6 || IPV6=n depends on !NF_CONNTRACK || NF_CONNTRACK select NF_DUP_IPV4 - select NF_DUP_IPV6 if IP6_NF_IPTABLES + select NF_DUP_IPV6 if IP6_NF_IPTABLES != n ---help--- This option adds a "TEE" target with which a packet can be cloned and this clone be rerouted to another nexthop. -- 2.17.1