diff options
Diffstat (limited to 'net/sched/sch_api.c')
| -rw-r--r-- | net/sched/sch_api.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 5d017c06a96f..e3e91cf867eb 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1664,6 +1664,10 @@ replay: 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; |