!1551 ksmbd: allocate one more byte for implied bcc[0

Merge Pull Request from: @ci-robot 
 
PR sync from: Li Nan <linan122@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ZPU6DOWXQ62ZYWCTSJSULWSJFG2MUIKX/ 
 
https://gitee.com/openeuler/kernel/issues/I7LU2I 
 
Link:https://gitee.com/openeuler/kernel/pulls/1551

 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>