!1591 net/sched: cls_u32: Fix reference counter leak leading to overflow

Merge Pull Request from: @ci-robot 
 
PR sync from: Lu Wei <luwei32@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/BHZDZMZMO33GAMZUG6UGXE75EWRFJO7B/ 
 
https://gitee.com/src-openeuler/kernel/issues/I7N3N2 
 
Link:https://gitee.com/openeuler/kernel/pulls/1591

 

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