linux-kernel - Re: bug in generic strncpy_from

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Message-ID: <CA+55aFz3JW6HnTC-4xqOBsgQNboLbjvZnQ0h7KfaZjQVinAt2g@mail.gmail.com>
Date:	Tue, 26 Feb 2013 16:30:50 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: bug in generic strncpy_from_user

On Tue, Feb 26, 2013 at 3:43 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> So I'll need to extend on that logic a bit more.

Ok, here's the fleshed-out patch. Also fixed to use "expand_stack()",
which is what the page fault handling actually uses. And it has the
GROWSUP case as well as a comment about this all.

So it all looks good. But it's still totally and entirely untested.

Because that's how I roll. Gangsta life!

              Linus

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