Re: [patch 2.6.13-rc4] fix get_user_pages bug

Linus Torvalds
2005-08-03T16:39:31Z

On Wed, 3 Aug 2005, Linus Torvalds wrote:
>
> Ok, I applied this because it was reasonably pretty and I liked the
> approach. It seems buggy, though, since it was using "switch ()" to test
> the bits (wrongly, afaik), and I'm going to apply the appended on top of
> it. Holler quickly if you disagreee..

Another problem I just thought of.

What about PROT_NONE pages? Afaik, they have _exactly_ the same issue on
the read side as a PROT_READ page has on the write side: pte_read() may
fail on them.

What makes us not get into an infinite loop there?

Linus