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[v3,14/21] l2tp: exit_net cleanup check added

Message ID	debf3bbe-b505-d0fa-4cc1-2d503c04647e@virtuozzo.com
State	Changes Requested, archived
Delegated to:	David Miller
Headers	show Return-Path: <netdev-owner@vger.kernel.org> From: Vasily Averin <vvs@virtuozzo.com> Subject: [PATCH v3 14/21] l2tp: exit_net cleanup check added To: netdev@vger.kernel.org References: <4fdc4264-e338-6ee8-a662-7d98b45733a1@virtuozzo.com> Message-ID: <debf3bbe-b505-d0fa-4cc1-2d503c04647e@virtuozzo.com> Date: Mon, 6 Nov 2017 16:25:08 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <4fdc4264-e338-6ee8-a662-7d98b45733a1@virtuozzo.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk
Series	exit_net checks for objects initialized in net_init hook \| expand [v2,00/21] exit_net checks for objects initialized in net_init hook [v3,01/21] grace: replace BUG_ON by WARN_ONCE in exit_net hook [v3,02/21] lockd: added cleanup checks in exit_net hook [v3,03/21] exit_net cleanup: geneve sock_list check [v3,04/21] ppp: exit_net cleanup checks added [v3,05/21] vxlan: exit_net cleanup checks added [v3,06/21] netdev: exit_net cleanup check added [v3,07/21] nfs4blocklayout: exit_net cleanup check added [v3,08/21] nfs client: exit_net cleanup check added [v3,09/21] fib_notifier: exit_net cleanup check added [v3,10/21] fib_rules: exit_net cleanup check added [v3,11/21] clusterip: exit_net cleanup check added [v3,12/21] xfrm6_tunnel: exit_net cleanup check added [v3,13/21] af_key: replace BUG_ON on WARN_ONCE in net_exit hook [v3,14/21] l2tp: exit_net cleanup check added [v3,15/21] nf_tables: exit_net cleanup check added [v3,16/21] nfnetlink_log: exit_net cleanup check added [v3,17/21] nfnetlink_gueue: exit_net cleanup check added [v3,18/21] x_tables: exit_net cleanup check added [v3,19/21] packet: exit_net cleanup check added [v3,20/21] phonet: exit_net cleanup check added [v3,21/21] sunrpc: exit_net cleanup check added

Commit Message

Vasily Averin Nov. 6, 2017, 1:25 p.m. UTC

Be sure that l2tp_session_hlist array initialized in net_init hook
was return to initial state.

Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
---
 net/l2tp/l2tp_core.c | 7 +++++++
 1 file changed, 7 insertions(+)

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Patch

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 02d6110..249a2ed 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1888,6 +1888,7 @@  static __net_exit void l2tp_exit_net(struct net *net)
 {
 	struct l2tp_net *pn = l2tp_pernet(net);
 	struct l2tp_tunnel *tunnel = NULL;
+	int hash;
 
 	rcu_read_lock_bh();
 	list_for_each_entry_rcu(tunnel, &pn->l2tp_tunnel_list, list) {
@@ -1897,6 +1898,12 @@  static __net_exit void l2tp_exit_net(struct net *net)
 
 	flush_workqueue(l2tp_wq);
 	rcu_barrier();
+
+	for (hash = 0; hash < L2TP_HASH_SIZE_2; hash++)
+		if (WARN_ONCE(!hlist_empty(&pn->l2tp_session_hlist[hash]),
+			      "net %x %s: session_hlist is not empty\n",
+			      net->ns.inum, __func__))
+			break;
 }
 
 static struct pernet_operations l2tp_net_ops = {