[PATCH 088/117] Staging: hv: netvsc: Inline the code for free_net_device()

Dan Carpenter
Sat, 16 Jul 2011 10:33:42 -0000

On Fri, Jul 15, 2011 at 10:47:16AM -0700, K. Y. Srinivasan
wrote:
> -static void free_net_device(struct netvsc_device *device)
> -{
> -	WARN_ON(atomic_read(&device->refcnt) != 0);
> -	device->dev->ext = NULL;

device->dev->ext points to device.  We set it NULL here to prevent
a use after free bug.  What prevents that in the new code?

> -	kfree(device);
> -}

regards,
dan carpenter