[BlueOnyx:21649] Re: Aventurin{e} 6108R Sceptre / Meltdown: Official Kernel out

[Michael Stauber]

Hi all,

Just a quick heads up for the Aventurin{e} 6108R users:

The official OpenVZ 6 kernel that patches Sceptre/Meltown is now out.
The version number for that is 2.6.32-042stab127.2.

If you already installed my unofficial "hotwired" 2.6.32-042stab126.666
and rebooted, then you do *not* need to worry. You are already good.

A diff between the official 2.6.32-042stab127.2 and the unofficial
2.6.32-042stab126.666 also shows that the OpenVZ kernel maintainers
applied the *exact* same patches.

diff -ruN ./arch/x86/mm/pgtable.c ../linux-16-to-vz/arch/x86/mm/pgtable.c
--- ./arch/x86/mm/pgtable.c     2018-01-07 04:22:45.057056298 +0100
+++ ../linux-16-to-vz/arch/x86/mm/pgtable.c     2018-01-05
08:13:54.251837657 +0100
@@ -325,8 +325,8 @@
        pgd_mop_up_pmds(mm, pgd);
        pgd_dtor(pgd);
        paravirt_pgd_free(mm, pgd);
-       free_pages((unsigned long)pgd, PGD_ALLOCATION_ORDER);
        mm->nr_ptds--;
+       free_pages((unsigned long)pgd, PGD_ALLOCATION_ORDER);
 }

 int ptep_set_access_flags(struct vm_area_struct *vma,

The only difference is the ordering of a single line, which (in this
context) doesn't seem to matter.

Do you need to switch to the official kernel (via a regular "yum
update") and do another reboot? I'd say: No, that's not necessary.

You're good for now as it is, provided you're running at least
2.6.32-042stab126.666.

-- 
With best regards

Michael Stauber