lkml.org 
[lkml]   [2008]   [Feb]   [12]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 12 Feb 2008 14:50:48 +0200
FromRiku Voipio <>
SubjectRe: futex local DoS on most architectures
Thomas Gleixner wrote:
> We have to disable the complete PI/robust functionality for those
> archs, which do not implement futex_atomic_cmpxchg_inatomic(). The
> code in question relies on a valid implementation and does not expect
> -ENOSYS, which is returned by the stub implementation in
> asm-generic/futex.h
>
> Pointed out by: Mikael Pettersson, Riku Voipio and Adrian Bunk
> 
Original credits for finding this issue belong to Lennert Buytenhek.
> This patch is intended for easy backporting and needs to be cleaned up
> further for current mainline.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Acked-by: Ingo Molnar <mingo@elte.hu>
Looks good for me and kernel no longer deadlocks with this patch!
--
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: 2008-02-12 13:55    [from the cache]
©2003-2008