netdev - [PATCH 1/5] 8021q: Vlan driver should use rcu_barrier() on unload instead of syncronize

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20090608131128.10052.30759.stgit@localhost>
Date:	Mon, 08 Jun 2009 15:11:28 +0200
From:	Jesper Dangaard Brouer <hawk@...x.dk>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Jesper Dangaard Brouer <hawk@...x.dk>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	urs.thuermann@...kswagen.de, oliver.hartkopp@...kswagen.de,
	wg@...ndegger.com, vladislav.yasevich@...com, sri@...ibm.com,
	linux-sctp@...r.kernel.org, Trond.Myklebust@...app.com,
	linux-nfs@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: [PATCH 1/5] 8021q: Vlan driver should use rcu_barrier() on unload
	instead of syncronize_net()

The VLAN 8021q driver needs to call rcu_barrier() when unloading the module,
instead of syncronize_net().  This is needed to make sure that outstanding
call_rcu() callbacks have completed, before the callback function code is
removed on module unload.

Signed-off-by: Jesper Dangaard Brouer <hawk@...x.dk>
---

 net/8021q/vlan.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 714e1c3..fe64908 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -758,7 +758,7 @@ static void __exit vlan_cleanup_module(void)
 		BUG_ON(!hlist_empty(&vlan_group_hash[i]));
 
 	unregister_pernet_gen_device(vlan_net_id, &vlan_net_ops);
-	synchronize_net();
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
 
 	vlan_gvrp_uninit();
 }

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html