net/sched: cls_flower: Reject invalid ct_state flags rules
Reject the unsupported and invalid ct_state flags of cls flower rules. Fixes: e0ace68a ("net/sched: cls_flower: Add matching on conntrack info") Signed-off-by: wenxu <wenxu@ucloud.cn> Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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