On Fri, Feb 17, 2017 at 9:42 PM, Fengguang Wu <fengguang...@intel.com> wrote:
> Greetings,
>
> FYI here is an old bug, however is still active in mainline kernel.
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>

> [    3.185986] init[1] vsyscall attempted with vsyscall=none 
> ip:ffffffffff600400 cs:33 sp:7ffe878ff8b8 ax:ffffffffff600400 si:7f2c3de62a4c 
> di:7ffe878ff978

I don't know what's up with the bisection, but I think this is a
configuration problem in your test setup.  You've configured with:

CONFIG_LEGACY_VSYSCALL_NONE=y

which is not valid when you're running binaries that are compiled with
as old a glibc as you're using.  *Dynamic* glibc binaries have been
fine for a long time, but static glibc binaried (e.g. your init, I
presume) need a glibc that's only a couple years old.

You could fix it by either disallowing that particular configuration
or by updating your distro.

--Andy

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