Re: [RFC] selftests/x86: Add test_vsyscall

[Borislav Petkov]

On Fri, Jan 05, 2018 at 10:47:15AM -0800, Andy Lutomirski wrote:
> The remaining problem is that, for certain classes of userspace bugs,
> an attacker can take advantage of the vsyscall page's existence at a
> fixed address to cause mischief.  So opting out of having it be there
> could be helpful to mitigate attacks.

I understand that but how do you shoo people off the vsyscall page? You
need to tell old binaries about the per-process disablement and new
binaries to move to vdso.

Hmmm, add big fat warnings to vsyscall_64.c?

-- 
Regards/Gruss,
    Boris.

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