From db04ff4863bf439500036b1882a9f2236f3c1d76 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 8 Oct 2018 06:22:41 -0400 Subject: [PATCH] net: sched: cls_u32: the tp_c argument of u32_set_parms() is always tp->data It must be tc_u_common associated with that tp (i.e. tp->data). Proof: * both ->ht_up and ->tp_c are assign-once * ->tp_c of anything inserted into tp_c->hlist is tp_c * hnodes never get reinserted into the lists or moved between those, so anything found by u32_lookup_ht(tp->data, ...) will have ->tp_c equal to tp->data. * tp->root->tp_c == tp->data. * ->ht_up of anything inserted into hnode->ht[...] is equal to hnode. * knodes never get reinserted into hash chains or moved between those, so anything returned by u32_lookup_key(ht, ...) will have ->ht_up equal to ht. * any knode returned by u32_get(tp, ...) will have ->ht_up->tp_c point to tp->data Signed-off-by: Al Viro Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/sched/cls_u32.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c index 53f34f8cde8b..3ed2c9866b36 100644 --- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -956,8 +956,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb, if (!new) return -ENOMEM; - err = u32_set_parms(net, tp, base, - rtnl_dereference(n->ht_up)->tp_c, new, tb, + err = u32_set_parms(net, tp, base, tp_c, new, tb, tca[TCA_RATE], ovr, extack); if (err) { @@ -1124,7 +1123,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb, } #endif - err = u32_set_parms(net, tp, base, ht->tp_c, n, tb, tca[TCA_RATE], ovr, + err = u32_set_parms(net, tp, base, tp_c, n, tb, tca[TCA_RATE], ovr, extack); if (err == 0) { struct tc_u_knode __rcu **ins; -- 2.30.2