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| author | Micah Gruber <micah.gruber@gmail.com> | 2007-07-23 16:05:52 +0800 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-07-30 15:44:50 -0400 |
| commit | 9351982b25ace7ee5ed82b6f4a7ea1151f31d267 (patch) | |
| tree | c12bba41d41a68e44bf8fdaeb9780fc17a0c647d /drivers/net | |
| parent | 80ba80a9bf25d251237694c3fcee850a73324532 (diff) | |
| download | linux-9351982b25ace7ee5ed82b6f4a7ea1151f31d267.tar.gz | |
Fix a potential NULL pointer dereference in write_bulk_callback() in drivers/net/usb/pegasus.c
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@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/usb/pegasus.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c index a05fd97e5bc2..04cba6bf3d54 100644 --- a/drivers/net/usb/pegasus.c +++ b/drivers/net/usb/pegasus.c @@ -768,11 +768,13 @@ done: 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; |