lkml.org 
[lkml]   [1999]   [Apr]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Possible security hole? [was: verify_area(...) possible problem]
    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/ ;-).

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:51    [W:0.021 / U:60.784 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site