Messages in this thread | | | Date | Mon, 21 Sep 1998 15:19:46 +0100 | From | Jamie Lokier <> | Subject | Re: PTRACE_POKEDATA on PROT_NONE hangs kernel |
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On Sun, Sep 20, 1998 at 11:17:27PM -0700, Linus Torvalds wrote: > Right. The above pages it in if it isn't present. In this case, it does > nothing, because the page _is_ present (as far as the kernel is > concerned), it's just marked non-present as far as hardware is concerned > in order to get the right PROT_NONE permissions.
Do all of those non-atomic tests, actions and following the chain of page table entries work ok when ptracing a cloned process?
I've no idea, it just looks a bit dodgy to me. Perhaps I don't understand the power of lock_kernel().
-- Jamie
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