Messages in this thread | | | From | Rusty Russell <> | Subject | Re: Users locking memory using futexes | Date | Wed, 13 Nov 2002 04:17:47 +1100 |
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In message <20021112034648.GA11766@bjl1.asuk.net> you write: > Perez-Gonzalez, Inaky wrote: > > [...] each time you lock a futex you are pinning the containing page > > into physical memory, that would cause that if you have, for > > example, 4000 futexes locked in 4000 different pages, there is going > > to be 4 MB of memory locked in [...] > > Ouch! It looks to me like userspace can use FUTEX_FD to lock many > pages of memory, achieving the same as mlock() but without the > resource checks. > > Denial of service attack?
See "pipe".
Rusty. -- Anyone who quotes me in their sig is an idiot. -- Rusty Russell. - 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/
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