# Re: \[PATCHv1 5/7\] TAP: Extending tap device create/destroy APIs

- From: Eric Dumazet \<hidden\>
- Date: 2017-01-06 23:24:26 
- List: netdev
- Page: https://ratatoskr.run/netdev/2017/01/4906895
- Thread: https://ratatoskr.run/netdev/2017/01/4906758/t.md

```text
On Fri, 2017-01-06 at 14:33 -0800, Sainath Grandhi wrote:

> +static int tap_list_add(dev_t major, const char *device_name)
> +{
> +	int err = 0;
> +	struct major_info *tap_major;
> +
> +	tap_major = kzalloc(sizeof(*tap_major), GFP_ATOMIC);
> +
> +	tap_major->major = MAJOR(major);
> +


kzalloc() can perfectly return NULL.

You do not want to crash it that happens.
```