Messages in this thread | | | Date | Tue, 12 Nov 2002 03:46:48 +0000 | From | Jamie Lokier <> | Subject | Users locking memory using futexes |
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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?
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