Messages in this thread | | | Date | Tue, 20 Apr 1999 12:51:00 +0200 | From | Pavel Machek <> | Subject | Re: Possible security hole? [was: verify_area(...) possible problem] |
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Hi!
> > This is a known problem, it is pretty much similar to what happened under 2.0 > > for all all architectures, not just the i386 and one of reasons for the new > > user space access stuff introduced from 2.1.4 on. Now that only the 386 is still > > affected just nobody bothered because on the 386 there are other funnies left > > which may make running a system used by possibly hostile users a bad idea. > > s/386/some very early stepping 386, which are only a small fraction > of the existing 386ers/. > > So it is really not a big problem.
Afaik, even very modern 386s contain popad bug which allows any user to lock processor hard. There is even check for that bug in asm/bugs.h (by me :-).
Pavel PS: My amd 386/40 certainly has popad bug. -- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).
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