lkml.org 
[lkml]   [2012]   [Jul]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH TRIVIAL] mm: Fix build warning in kmem_cache_create()
On Mon, 16 Jul 2012, David Rientjes wrote:

> > The kernel cannot check everything and will blow up in unexpected ways if
> > someone codes something stupid. There are numerous debugging options that
> > need to be switched on to get better debugging information to investigate
> > deper. Adding special code to replicate these checks is bad.
> >
>
> Disagree, CONFIG_SLAB does not blow up for a NULL name string and just
> corrupts userspace.

Ohh.. So far we only had science fiction. Now kernel fiction.... If you
could corrupt userspace using sysfs with a NULL string then you'd first
need to fix sysfs support.

And if you really want to be totally safe then I guess you need to audit
the kernel and make sure that every core kernel function that takes a
string argument does check for it to be NULL just in case.


\
 
 \ /
  Last update: 2012-07-17 17:21    [W:0.099 / U:1.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site