[PKT_SCHED] sch_htb: Use hlist_del_init().

Otherwise we can hit paths that (legally) do multiple deletes on the
same node and OOPS with the HLIST poison values there instead of
NULL.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 9b9c555c713f..4b52fa78935a 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1284,8 +1284,7 @@ static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
                                                   struct htb_class, sibling));
 
         /* note: this delete may happen twice (see htb_delete) */
-        if (!hlist_unhashed(&cl->hlist))
-                hlist_del(&cl->hlist);
+        hlist_del_init(&cl->hlist);
         list_del(&cl->sibling);
 
         if (cl->prio_activity)
@@ -1333,8 +1332,7 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg)
         sch_tree_lock(sch);
 
         /* delete from hash and active; remainder in destroy_class */
-        if (!hlist_unhashed(&cl->hlist))
-                hlist_del(&cl->hlist);
+        hlist_del_init(&cl->hlist);
 
         if (cl->prio_activity)
                 htb_deactivate(q, cl);