[PATCH] [2.6.22] Fix a potential NULL pointer dereference in write_bulk_callback()in drivers/net/usb/pegasus.c

[Micah Gruber]

This patch fixes a potential null dereference bug where we dereference 
pegasus before a null check. This patch simply moves the dereferencing 
after the null check.

Signed-off-by: Micah Gruber <micah.gruber@xxxxxxxxx>

---

--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -768,11 +768,13 @@
static void write_bulk_callback(struct urb *urb)
{
       pegasus_t *pegasus = urb->context;
-       struct net_device *net = pegasus->net;
+       struct net_device *net;

       if (!pegasus)
               return;

+       net = pegasus->net;
+
       if (!netif_device_present(net) || !netif_running(net))
               return;
-
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