!2412 netfilter: xt_sctp: validate the flag_info count

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhengchao Shao <shaozhengchao@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/7FP3ZE7U3NX7XIKIIP5VZRC4XQM4TANZ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I85CAQ 
 
Link:https://gitee.com/openeuler/kernel/pulls/2412

 

Reviewed-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>