lkml.org 
[lkml]   [2007]   [Apr]   [13]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
FromAndreas Gruenbacher <>
SubjectRe: [AppArmor 37/41] AppArmor: Main Part
DateFri, 13 Apr 2007 10:48:17 +0200
On Thursday 12 April 2007 12:37, Alan Cox wrote:
> > +		if (PTR_ERR(sa->name) == -ENOENT && (check & AA_CHECK_FD))
> > +			denied_mask = 0;
>
> Now there is an interesting question. Is PTR_ERR() safe for kernel
> pointers on all platforms or just for user ones ?

It's used for kernel pointers all over the place and mmap also mixes user 
addresses with -Exxx, so it's definitely supposed to work. I'm not sure how 
exactly the topmost page is kept from getting mapped.

Andreas
-
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: 2007-04-13 10:51    [from the cache]
©2003-2008