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

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-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • [patch] avoid unaligned access when accessing poll stack
    • From: Jes Sorensen <[email protected]>
  • Re: [patch] avoid unaligned access when accessing poll stack
    • From: Jes Sorensen <[email protected]>
  • Re: [patch] avoid unaligned access when accessing poll stack
    • From: Mitchell Blank Jr <[email protected]>

• Prev by Date: Re: [patch] avoid unaligned access when accessing poll stack
• Next by Date: Re: [RFC] sched.c : procfs tunables
• Previous by thread: Re: [patch] avoid unaligned access when accessing poll stack
• Next by thread: Re: [patch] avoid unaligned access when accessing poll stack
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]