[RFC] fs, proc: Introduce the /proc/<pid>/map_files/ directory v2

Vasiliy Kulikov segoon at openwall.com
Thu Aug 25 10:54:38 PDT 2011


On Thu, Aug 25, 2011 at 21:39 +0400, Cyrill Gorcunov wrote:
> On Thu, Aug 25, 2011 at 09:36:42PM +0400, Vasiliy Kulikov wrote:
> ...
> > > +
> > > +	result = ERR_PTR(-EPERM);
> > > +	if (!ptrace_may_access(task, PTRACE_MODE_READ));
> > > +		goto out_no_mm;
> > 
> > Probably
> > 
> >     result = ERR_PTR(-ENOENT);
> > 
> > belongs here?
> > 
> 
> Don't think so, it should point that permission failed
> rather no such entry. Or this might break some tools?

I mean the place exactly where I've put it to indicate simple_strtoul(),
get_task_mm(), or find_exact_vma() error.  EPERM for ptrace_may_access()
is OK.

Thanks,

-- 
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments


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