Unverified Commit 1356fff3 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!15335 net: sched: Disallow replacing of child qdisc from one parent to another 

Merge Pull Request from: @ci-robot 
 
PR sync from: Wang Liang <wangliang74@huawei.com>
https://mailweb.openeuler.org/archives/list/kernel@openeuler.org/message/UDYQ2V3YS2HLVEZEYWV54WZF3DVZP5S7/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBM687 
 
Link:https://gitee.com/openeuler/kernel/pulls/15335

 

Reviewed-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
Reviewed-by: default avatarYuan Can <yuancan@huawei.com>
Signed-off-by: default avatarYuan Can <yuancan@huawei.com>
parents f974aa14 25491e5b

net/sched/sch_api.c

+4 −0
Original line number Diff line number Diff line
@@ -1519,6 +1519,10 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, 
				q = qdisc_lookup(dev, tcm->tcm_handle);

				if (!q)

					goto create_n_graft;

				if (q->parent != tcm->tcm_parent) {

					NL_SET_ERR_MSG(extack, "Cannot move an existing qdisc to a different parent");

					return -EINVAL;

				}

				if (n->nlmsg_flags & NLM_F_EXCL) {

					NL_SET_ERR_MSG(extack, "Exclusivity flag on, cannot override");

					return -EEXIST;