linux-kernel - [PATCH 3/3] X25: Fix oops and refcnt problems from x25_dev

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Date:	Wed, 25 Nov 2009 12:16:05 +1100
From:	andrew hendry <andrew.hendry@...il.com>
To:	netdev@...r.kernel.org
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-x25@...r.kernel.org
Subject: [PATCH 3/3] X25: Fix oops and refcnt problems from x25_dev_get

Calls to x25_dev_get check for dev = NULL which was not set.
It allowed x25 to set routes and ioctls on down interfaces.
This caused oopses and refcnt problems on device_unregister.

Signed-off-by: Andrew Hendry <andrew.hendry@...il.com>

--- a/net/x25/x25_route.c	2009-11-25 09:30:52.003038597 +1100
+++ b/net/x25/x25_route.c	2009-11-25 09:33:37.627093701 +1100
@@ -136,8 +136,10 @@ struct net_device *x25_dev_get(char *dev
 #if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
 					&& dev->type != ARPHRD_ETHER
 #endif
-					)))
+					))){
 		dev_put(dev);
+		dev = NULL;
+	}

 	return dev;
 }
--
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