PR sync from: Yi Yang yiyang13@huawei.com
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/DNNWU6GWE43KHSQXBVHMSM654CMOOHOX/
Fix it by revert hulk patch and backport patch from mainline.

Yi Yang (2):
Revert "tty: fix pid memleak in disassociate_ctty()"
tty: tty_jobctrl: fix pid memleak in disassociate_ctty()

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2.25.1

#I9ER2W:【olk - 5.10】cgroup结合cpu上下线测试长稳环境出现 BUG: unable to handle page fault for address: 00003984d0425d58