linux-kernel - [ 03/23] neighbour: populate neigh_parms on alloc before calling ndo_neigh

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Date:	Thu, 12 Sep 2013 10:44:59 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Veaceslav Falico <vfalico@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [ 03/23] neighbour: populate neigh_parms on alloc before calling ndo_neigh_setup

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Veaceslav Falico <vfalico@...hat.com>

[ Upstream commit 63134803a6369dcf7dddf7f0d5e37b9566b308d2 ]

dev->ndo_neigh_setup() might need some of the values of neigh_parms, so
populate them before calling it.

Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/core/neighbour.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1442,16 +1442,18 @@ struct neigh_parms *neigh_parms_alloc(st
 		atomic_set(&p->refcnt, 1);
 		p->reachable_time =
 				neigh_rand_reach_time(p->base_reachable_time);
+		dev_hold(dev);
+		p->dev = dev;
+		write_pnet(&p->net, hold_net(net));
+		p->sysctl_table = NULL;
 
 		if (ops->ndo_neigh_setup && ops->ndo_neigh_setup(dev, p)) {
+			release_net(net);
+			dev_put(dev);
 			kfree(p);
 			return NULL;
 		}
 
-		dev_hold(dev);
-		p->dev = dev;
-		write_pnet(&p->net, hold_net(net));
-		p->sysctl_table = NULL;
 		write_lock_bh(&tbl->lock);
 		p->next		= tbl->parms.next;
 		tbl->parms.next = p;


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