usb ethernet gadget, workaround network stack API glitch

Another workaround for the glitch in the network layer, whereby one call
ignores the (otherwise kernel-wide) convention that free() calls should
not oops when passed nulls.  This code already handles that API glitch in
most other paths.

From: Erik Hovland <erik@hovland.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 8f9f217e0a68..96df8413f391 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1735,7 +1735,8 @@ enomem:
                 defer_kevent (dev, WORK_RX_MEMORY);
         if (retval) {
                 DEBUG (dev, "rx submit --> %d\n", retval);
-                dev_kfree_skb_any (skb);
+                if (skb)
+                        dev_kfree_skb_any(skb);
                 spin_lock(&dev->req_lock);
                 list_add (&req->list, &dev->rx_reqs);
                 spin_unlock(&dev->req_lock);