!7425 net: gtp: Fix Use-After-Free in gtp_dellink

Merge Pull Request from: @ci-robot 
 
PR sync from: Pu Lehui <pulehui@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/L6ZVOTXHVYWD2RETARXLW3PQSQDA65LZ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9O0MU 
 
Link:https://gitee.com/openeuler/kernel/pulls/7425

 

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