4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Cong Wang xiyou.wangcong@gmail.com
[ Upstream commit f12c643209db0626f2f54780d86bb93bfa7a9c2d ]
When we delete a u32 key via u32_delete_key(), we forget to call idr_remove() to remove its handle from IDR.
Fixes: e7614370d6f0 ("net_sched: use idr to allocate u32 filter handles") Reported-by: Marcin Kabiesz admin@hostcenter.eu Tested-by: Marcin Kabiesz admin@hostcenter.eu Signed-off-by: Cong Wang xiyou.wangcong@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sched/cls_u32.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/sched/cls_u32.c +++ b/net/sched/cls_u32.c @@ -478,6 +478,7 @@ static int u32_delete_key(struct tcf_pro RCU_INIT_POINTER(*kp, key->next);
tcf_unbind_filter(tp, &key->res); + idr_remove(&ht->handle_idr, key->handle); tcf_exts_get_net(&key->exts); call_rcu(&key->rcu, u32_delete_key_freepf_rcu); return 0;