!4288 net/rds: Fix UBSAN: array-index-out-of-bounds in rds_cmsg_recv

Merge Pull Request from: @ci-robot 
 
PR sync from: Dong Chenchen <dongchenchen2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/WQNUNNYY2WBRJR44JORQZTAON7VMYIUL/ 
 
https://gitee.com/src-openeuler/kernel/issues/I8YC9I 
 
Link:https://gitee.com/openeuler/kernel/pulls/4288

 

Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>