lkml.org 
[lkml]   [2001]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: msync() bug
On Mon, 9 Jul 2001, Andrea Arcangeli wrote:
> On Tue, Jul 10, 2001 at 12:43:12AM +1000, Andrew Morton wrote:
> >
> > Question: What happens if a program mmap's a part of /dev/mem
> > which passes all of these tests? Couldn't it then pick some
>
> that cannot happen, remap_pte_range only maps invalid pages or reserved
> pages.
>
> > arbitrary member of mem_map[] which may or may not have
> > a non-zero ->mapping?

Anyone know why mmap() of /dev/mem behaves in this way - solves the
problem Andrew raises, but surely that could be solved in a better way?
Seems strange that mmap() cannot give you what read() and write() can.

Hugh

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:56    [W:3.059 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site