From: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Date: Mon, 25 Oct 2010 07:43:32 +0000 (+0300)
Subject: Phonet: device notifier only runs on initial namespace
X-Git-Tag: v2.6.32.40~14
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c33790ec1212ef7a3f302c3e410cba6e0affe489;p=karo-tx-linux.git

Phonet: device notifier only runs on initial namespace

[bwh: This is only applicable to 2.6.32. Phonet was fixed upstream to
work with multiple net namespaces.]

This should really fix the OOPS when doing:

  unshare(CLONE_NEWNET);
  exit(0);

while the phonet module is loaded.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index 5a2275c4ee79..d94ca91334d3 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -225,6 +225,9 @@ static int phonet_device_notify(struct notifier_block *me, unsigned long what,
 {
 	struct net_device *dev = arg;
 
+	if (!net_eq(dev_net(dev), &init_net))
+		return 0;
+
 	switch (what) {
 	case NETDEV_REGISTER:
 		if (dev->type == ARPHRD_PHONET)