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    SubjectRe: [PATCH v2 1/8] x86/vsyscall: Remove the vsyscall=native documentation
    On Wed, Jun 26, 2019 at 09:45:02PM -0700, Andy Lutomirski wrote:
    > The vsyscall=native feature is gone -- remove the docs.
    >
    > Fixes: 076ca272a14c ("x86/vsyscall/64: Drop "native" vsyscalls")
    > Cc: stable@vger.kernel.org
    > Cc: Kees Cook <keescook@chromium.org>
    > Cc: Borislav Petkov <bp@alien8.de>
    > Cc: Kernel Hardening <kernel-hardening@lists.openwall.com>
    > Cc: Peter Zijlstra <peterz@infradead.org>
    > Cc: Thomas Gleixner <tglx@linutronix.de>
    > Signed-off-by: Andy Lutomirski <luto@kernel.org>

    Acked-by: Kees Cook <keescook@chromium.org>

    -Kees

    > ---
    > Documentation/admin-guide/kernel-parameters.txt | 6 ------
    > 1 file changed, 6 deletions(-)
    >
    > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
    > index 138f6664b2e2..0082d1e56999 100644
    > --- a/Documentation/admin-guide/kernel-parameters.txt
    > +++ b/Documentation/admin-guide/kernel-parameters.txt
    > @@ -5102,12 +5102,6 @@
    > emulate [default] Vsyscalls turn into traps and are
    > emulated reasonably safely.
    >
    > - native Vsyscalls are native syscall instructions.
    > - This is a little bit faster than trapping
    > - and makes a few dynamic recompilers work
    > - better than they would in emulation mode.
    > - It also makes exploits much easier to write.
    > -
    > none Vsyscalls don't work at all. This makes
    > them quite hard to use for exploits but
    > might break your system.
    > --
    > 2.21.0
    >

    --
    Kees Cook

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