# Re: \[PATCH\] vsprintf: Do not break early boot with probing addresses

- From: Sergey Senozhatsky \<hidden\>
- Date: 2019-05-14 02:25:33 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2019/05/5595968
- Thread: https://ratatoskr.run/linuxppc-dev/2019/05/5592853/t.md

```text
On (05/14/19 11:07), Sergey Senozhatsky wrote:
> How about this:
> 
> 	if ptr < PAGE_SIZE		-> "(null)"

No, this is totally stupid. Forget about it. Sorry.


> 	if IS_ERR_VALUE(ptr)		-> "(fault)"

But Steven's "(fault)" is nice.

	-ss
```