lkml.org 
[lkml]   [2003]   [Sep]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Local DoS on single_open?
On Thu, Sep 11, 2003 at 02:42:13PM +1000, Keith Owens wrote:
> single_open() requires the kernel to kmalloc a buffer which lives until
> the userspace caller closes the file. What prevents a malicious user
> opening the same /proc entry multiple times, allocating lots of kmalloc
> space and causing a local DoS?

Size of that buffer is limited. IOW, it's not different from opening
e.g. a shitload of pipes or sockets.
-
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 13:48    [from the cache]
©2003-2011 Jasper Spaans