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commit1bcc51ac07upstream. Reject the unsupported and invalid ct_state flags of cls flower rules. Fixes:e0ace68af2("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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>