# Re: \[PATCH v12 07/22\] selftests/vm: fixed bugs in pkey\_disable\_clear()

- From: Dave Hansen \<hidden\>
- Date: 2018-03-16 22:08:31 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2018/03/5218925
- Thread: https://ratatoskr.run/linux-kselftest/2018/02/5195852/t.md

```text
On 02/21/2018 05:55 PM, Ram Pai wrote:
> --- a/tools/testing/selftests/vm/protection_keys.c
> +++ b/tools/testing/selftests/vm/protection_keys.c
> @@ -461,7 +461,7 @@ void pkey_disable_clear(int pkey, int flags)
>  			pkey, pkey, pkey_rights);
>  	pkey_assert(pkey_rights >= 0);
>  
> -	pkey_rights |= flags;
> +	pkey_rights &= ~flags;
>  
>  	ret = pkey_set(pkey, pkey_rights, 0);
>  	/* pkey_reg and flags have the same format */
> @@ -475,7 +475,7 @@ void pkey_disable_clear(int pkey, int flags)
>  	dprintf1("%s(%d) pkey_reg: 0x%016lx\n", __func__,
>  			pkey, rdpkey_reg());
>  	if (flags)
> -		assert(rdpkey_reg() > orig_pkey_reg);
> +		assert(rdpkey_reg() < orig_pkey_reg);
>  }
>  
>  void pkey_write_allow(int pkey)

This seems so horribly wrong that I wonder how it worked in the first
place.  Any idea?
```