Re: [patch] avoid unaligned access when accessing poll stack

From: Andi Kleen <ak_at_suse.de>
Date: 2006-04-01 13:44:09
On Saturday 01 April 2006 04:35, Mitchell Blank Jr wrote:

>   * I also changed "size" to be unsigned since that makes more sense and
>     is less prone to overflow bugs.  I'm also a little scared by the
>     "kmalloc(6 * size)" since that type of call is a classic multiply-overflow
>     security hole (hence libc's calloc() API).  However "size" is constrained
>     by fdt->max_fdset so I think it isn't exploitable.  The kernel doesn't
>     have an overflow-safe API for kmalloc'ing arrays, does it?

kcalloc. But it's slow since it memsets.

-Andi

-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Sat Apr 01 13:44:56 2006

This archive was generated by hypermail 2.1.8 : 2006-04-01 13:45:07 EST