Re: [PATCH 09/11] security: Protection for exploiting null dereference using mmap

[James Morris <jmorris@namei.org>]

On Tue, 10 Jul 2007, Jan Engelhardt wrote:

> 
> On Jul 8 2007 22:59, James Morris wrote:
> >@@ -420,8 +420,12 @@ static int dummy_file_ioctl (struct file *file, unsigned int command,
> > 
> > static int dummy_file_mmap (struct file *file, unsigned long reqprot,
> > 			    unsigned long prot,
> >-			    unsigned long flags)
> >+			    unsigned long flags,
> >+			    unsigned long addr,
> >+			    unsigned long addr_only)
> > {
> >+	if (addr < mmap_min_addr)
> >+		return -EACCES;
> > 	return 0;
> > }
> > 
> 
> Not -EPERM?

No, EACCES is what's used.


-- 
James Morris
<jmorris@namei.org>
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