Messages in this thread | | | Date | Thu, 16 Feb 2006 21:23:57 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 0/6] lightweight robust futexes: -V3 |
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* Daniel Walker <dwalker@mvista.com> wrote:
> On Thu, 2006-02-16 at 18:24 +0100, Ingo Molnar wrote: > > * Daniel Walker <dwalker@mvista.com> wrote: > > > > > Another thing I noticed was that futex_offset on the surface looks > > > like a malicious users dream variable .. [...] > > > > i have no idea what you mean by that - could you explain whatever threat > > you have in mind, in more detail? > > As I said, "on the surface" you could manipulate the > futex_offset to access memory unrelated to the futex structure . > That's all I'm referring too ..
and? You can 'manipulate' arbitrary userspace memory, be that used by the kernel or not, and you can do a sys_futex(FUTEX_WAKE) on any arbitrary userspace memory address too (this is a core property of futexes). You must have meant something specific when you said "on the surface looks like a malicious users dream variable". In other words: please move your statement out of innuendo by backing it up with specifics (or by retracting it) - right now it's hanging in the air :)
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