Messages in this thread | | | Date | Mon, 19 Apr 1999 17:08:50 +0200 | From | Pavel Machek <> | Subject | Re: Possible security hole? [was: verify_area(...) possible problem] |
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Hi!
[Linus stripped from Cc:, he is probably not interested in our 386 discussion]
> > This is old news. I even did a patch: [hopefully noone uses 386's for > > multiuser shell servers :-)] . But still it is a bug. I think it > > should be fixed. > > Oh, I was hoping the patch would actually fix the behaviour, rather than > turning off clone :-)
Noone uses clone, anyway ;-).
> > I do have 386. If you post me nice .c program, I'll happily test it > > for you. [What about duplicating it by forcing kernel to think it has > > old 386. That should work - 486+ all backward compatible after all.] > > Unfortunately 486s are not backward compatible in this regard.
I do think they are. You need to enable special bit 'write protect even in supervisor mode' to get non-386 (==good) behaviour.
Pavel
-- The best software in life is free (not shareware)! Pavel GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+
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