Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.debian.user > #191024
| From | Tixy <tixy@yxit.co.uk> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: CVE-2017-5754 - ETA? |
| Date | 2018-01-13 09:10 +0100 |
| Message-ID | <v7p34-3dS-7@gated-at.bofh.it> (permalink) |
| References | (3 earlier) <v77IS-lC-3@gated-at.bofh.it> <v797Y-1md-17@gated-at.bofh.it> <v7eKl-4Yc-11@gated-at.bofh.it> <v7f3H-54I-1@gated-at.bofh.it> <v7fn3-5cJ-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Fri, 2018-01-12 at 22:40 +0100, Vincent Lefevre wrote:
> On 2018-01-12 21:21:06 +0000, Nick wrote:
> > It might have aged out of the buffer that dmesg reports on.
>
> No, there's the beginning of the dmesg output:
>
> [ 0.000000] Linux version 4.9.0-5-amd64 (debian-kernel@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.65-3+deb9u2 (2018-01-04)
>
> But I think I've found the reason:
>
> In arch/x86/mm/kaiser.c:
>
> void __init kaiser_check_boottime_disable(void)
> {
> [...]
> if (boot_cpu_has(X86_FEATURE_XENPV))
> goto silent_disable;
> [...]
> disable:
> pr_info("disabled\n");
>
> silent_disable:
> kaiser_enabled = 0;
> setup_clear_cpu_cap(X86_FEATURE_KAISER);
> }
>
> I must be in the "silent_disable" case (this is a Xen guest).
>
> It's unfortunate that no-one mentions this case!
Hmm. I have a system running under Xen and get the 'page tables
isolation: enabled' message. Here's what I hope are relevant parts from
dmesg output...
[ 0.000000] Linux version 4.9.0-5-amd64 (debian-kernel@lists.debian.org) (gcc version 6.3.0 20170
516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.65-3+deb9u2 (2018-01-04)
...
[ 0.000000] DMI: Xen HVM domU, BIOS 4.8.1-pre-memset3 06/07/2017
[ 0.000000] Hypervisor detected: Xen
[ 0.000000] Xen version 4.8.
...
[ 0.000000] Booting paravirtualized kernel on Xen HVM
...
[ 0.000000] Kernel/User page tables isolation: enabled
--
Tixy
Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
CVE-2017-5754 - ETA? francis picabia <fpicabia@gmail.com> - 2018-01-04 15:00 +0100
Re: CVE-2017-5754 - ETA? Don Armstrong <don@debian.org> - 2018-01-04 21:50 +0100
Re: CVE-2017-5754 - ETA? francis picabia <fpicabia@gmail.com> - 2018-01-08 16:40 +0100
Re: CVE-2017-5754 - ETA? Jeroen Mathon <jeroenmathonmac@gmail.com> - 2018-01-08 17:20 +0100
Re: CVE-2017-5754 - ETA? Tixy <tixy@yxit.co.uk> - 2018-01-08 18:10 +0100
Re: CVE-2017-5754 - ETA? Sven Joachim <svenjoac@gmx.de> - 2018-01-08 18:40 +0100
Re: CVE-2017-5754 - ETA? Richard Hector <richard@walnut.gen.nz> - 2018-01-08 22:30 +0100
Re: CVE-2017-5754 - ETA? francis picabia <fpicabia@gmail.com> - 2018-01-10 13:50 +0100
Re: CVE-2017-5754 - ETA? Vincent Lefevre <vincent@vinc17.net> - 2018-01-12 14:40 +0100
Re: CVE-2017-5754 - ETA? bw <bwtnguy@yahoo.com> - 2018-01-12 16:10 +0100
Re: CVE-2017-5754 - ETA? Jack Dangler <tdldev@gmail.com> - 2018-01-12 17:00 +0100
Re: CVE-2017-5754 - ETA? Roberto C. Sánchez <roberto@debian.org> - 2018-01-12 17:00 +0100
Re: CVE-2017-5754 - ETA? Vincent Lefevre <vincent@vinc17.net> - 2018-01-12 22:10 +0100
Re: CVE-2017-5754 - ETA? Roberto C. Sánchez <roberto@debian.org> - 2018-01-12 22:20 +0100
Re: CVE-2017-5754 - ETA? Vincent Lefevre <vincent@vinc17.net> - 2018-01-12 22:20 +0100
Re: CVE-2017-5754 - ETA? Nick <debuser@acrasis.net> - 2018-01-12 22:30 +0100
Re: CVE-2017-5754 - ETA? Vincent Lefevre <vincent@vinc17.net> - 2018-01-12 22:50 +0100
Re: CVE-2017-5754 - XEN silent_disable? bw <bwtnguy@yahoo.com> - 2018-01-13 02:10 +0100
Re: CVE-2017-5754 - XEN silent_disable? <tomas@tuxteam.de> - 2018-01-13 08:30 +0100
Re: CVE-2017-5754 - XEN silent_disable? Vincent Lefevre <vincent@vinc17.net> - 2018-01-13 10:50 +0100
Re: CVE-2017-5754 - XEN silent_disable? <tomas@tuxteam.de> - 2018-01-13 12:30 +0100
Re: CVE-2017-5754 - ETA? Tixy <tixy@yxit.co.uk> - 2018-01-13 09:10 +0100
Re: CVE-2017-5754 - ETA? Tixy <tixy@yxit.co.uk> - 2018-01-13 09:50 +0100
csiph-web