linux-kernel - Re: [PATCH 1/3] MIPS: uaccess: Added __get/__put_kernel

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Date:   Tue, 30 Mar 2021 22:02:08 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] MIPS: uaccess: Added __get/__put_kernel_nofault

On Tue, Mar 30, 2021 at 07:48:35PM +0200, Christoph Hellwig wrote:
> On Tue, Mar 30, 2021 at 07:26:58PM +0200, Thomas Bogendoerfer wrote:
> > Added __get/__put_kernel_nofault as preparation for removing
> > get/set_fs.
> 
> For !CONFIG_EVA __get_user_common is simply defined to
> __get_kernel_common, which probably does the wrong thing here
> as it would allow access to user space addresses, won't it?

it does, so I'm missing a copy_from_kernel_nofault_allowed() function,
which only allows kernel access, right ?

Thomas.

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