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Message-ID: <20080211141612.GC20381@xi.wantstofly.org> Date: Mon, 11 Feb 2008 15:16:12 +0100 From: Lennert Buytenhek <buytenh@...tstofly.org> To: Thomas Gleixner <tglx@...utronix.de> Cc: Adrian Bunk <adrian.bunk@...ial.fi>, Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, Riku Voipio <riku.voipio@...ial.fi>, Mikael Pettersson <mikpe@...uu.se>, Rusty Russell <rusty@...tcorp.com.au> Subject: Re: futex local DoS on most architectures On Mon, Feb 11, 2008 at 02:59:34PM +0100, Thomas Gleixner wrote: > Subject: futex: disable PI/robust on archs w/o valid implementation > From: Thomas Gleixner <tglx@...utronix.de> > > 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 FWIW, I reported it originally. > This patch is intended for easy backporting and needs to be cleaned up > further for current mainline. > > Signed-off-by: Thomas Gleixner <tglx@...utronix.de> > Acked-by: Ingo Molnar <mingo@...e.hu> Looks good to me. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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