netlbl_unlhsh_add_addr6() always returned zero after netlbl_af6list_add(), masking failures such as duplicate IPv6 static label entries. Signed-off-by: Chenguang Zhao <zhaochenguang@kylinos.cn> Acked-by: Paul Moore <paul@paul-moore.com> Link: https://patch.msgid.link/20260522022910.398416-1-zhaochenguang@kylinos.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org>