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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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
andrew hendry 2009-11-24 15:16:05 +00:00 committed by David S. Miller
parent 1fd975a052
commit 429d33ace5
1 changed files with 3 additions and 1 deletions
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4
net/x25/x25_route.c
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@ -136,8 +136,10 @@ struct net_device *x25_dev_get(char *devname)
#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
&& dev->type != ARPHRD_ETHER
#endif
)))
))){
dev_put(dev);
dev = NULL;
}
return dev;
}