Re: [PATCH] lib: introduce strdup_from_user

From: Scott Wood
Date: Fri Jun 03 2011 - 15:06:07 EST


On Fri, 3 Jun 2011 21:39:28 +0300
Alexey Dobriyan <adobriyan@xxxxxxxxx> wrote:

> On Fri, Jun 3, 2011 at 9:34 PM, Timur Tabi <timur@xxxxxxxxxxxxx> wrote:
> > Would it be better if I did this:
>
> The point is data should cross kernelspace/userspace boundary only once.
>

Why does it matter, as long as it doesn't hurt the kernel if userspace
plays games (i.e. take care of the NUL termination), and it's not a
performance problem?

-Scott

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