Unverified Commit 66263229 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!5058 net: fix possible store tearing in neigh_periodic_work() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhengchao Shao <shaozhengchao@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/FAWJ2YDGHCXOZM6KMUOV5WRR6PVXGQLO/ 
 
https://gitee.com/src-openeuler/kernel/issues/I95AWK 
 
Link:https://gitee.com/openeuler/kernel/pulls/5058

 

Reviewed-by: default avatarYue Haibing <yuehaibing@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents a300fa02 17688897

net/core/neighbour.c

+3 −1
Original line number Diff line number Diff line
@@ -935,7 +935,9 @@ static void neigh_periodic_work(struct work_struct *work) 
			    (state == NUD_FAILED ||

			     !time_in_range_open(jiffies, n->used,

						 n->used + NEIGH_VAR(n->parms, GC_STALETIME)))) {

				*np = n->next;

				rcu_assign_pointer(*np,

					rcu_dereference_protected(n->next,

						lockdep_is_held(&tbl->lock)));

				neigh_mark_dead(n);

				write_unlock(&n->lock);

				neigh_cleanup_and_release(n);