[PATCH] ip_gre.c in 2.6.0-test5

[Michal Ludvig <michal@xxxxxxxx>]

Hi all,
this trivial patch fixes possible kernel crash when using GRE tunnels in 
2.6.0-test. The problem was that "dev->init" wasn't set before 
register_netdevice() call and so the initialization function was never 
called. Consequently some fields in the tunnel structure were not 
initialized what finally led to a kernel crash upon receiving the first 
packet over the GRE tunnel.

Michal Ludvig
--
* A mouse is a device used to point at the xterm you want to type in.
* Personal homepage - http://www.logix.cz/~mic

# Patch for http://bugme.osdl.org/show_bug.cgi?id=1130 
# Applies cleanly to 2.6.0-test5
# Michal Ludvig <mludvig@xxxxxxx>
--- linux-2.6.0-test5-clean/net/ipv4/ip_gre.c   2003-09-08 21:50:18.000000000 
+0200
+++ linux-2.6.0-test5/net/ipv4/ip_gre.c 2003-09-23 16:50:09.000000000 +0200
@@ -271,13 +271,17 @@ static struct ip_tunnel * ipgre_tunnel_l
        }
 
        dev = alloc_netdev(sizeof(*t), name, ipgre_tunnel_setup);
+       if (!dev)
+         return NULL;
+
+       dev->init = ipgre_tunnel_init;
+
        if (register_netdevice(dev) < 0) {
                kfree(dev);
                goto failed;
        }
 
        nt = dev->priv;
-       dev->init = ipgre_tunnel_init;
        nt->parms = *parms;
 
        dev_hold(dev);