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

Dan Carpenter
2011-07-16T10:35:36Z

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