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Re: Is Debian Linux protected against the Meltdown and Spectre security flaws?

From Stephan Seitz <stse+debian@fsing.rootsland.net>
Newsgroups linux.debian.user
Subject Re: Is Debian Linux protected against the Meltdown and Spectre security flaws?
Date 2018-02-20 10:20 +0100
Message-ID <vlcfD-764-11@gated-at.bofh.it> (permalink)
References (3 earlier) <vkYmm-6zz-5@gated-at.bofh.it> <vkYZ4-72v-11@gated-at.bofh.it> <vkZ8K-75Q-15@gated-at.bofh.it> <vl1ay-8oh-15@gated-at.bofh.it> <vl8lI-4DR-5@gated-at.bofh.it>
Organization Minas Tirith, Gondor

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On Di, Feb 20, 2018 at 05:09:12 +0000, Andy Smith wrote:
>CVE-2017-5753 is Spectre v1. There is no fix for Spectre v1 anywhere
>yet, not even in Linux upstream.

Are you sure?

CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Mitigated according to the /sys interface:  YES  (kernel confirms that the mitigation is active)
* Kernel has array_index_mask_nospec:  YES  (1 occurence(s) found of 64 bits array_index_mask_nospec())
* Checking count of LFENCE instructions following a jump in kernel:  NO  (only 3 jump-then-lfence instructions found, should be >= 30 (heuristic))
> STATUS:  NOT VULNERABLE  (Mitigation: __user pointer sanitization)

Kernel is Linux 4.15.4 #1 SMP Sat Feb 17 23:19:56 CET 2018 x86_64, 
compiled myself with gcc 7.3 from testing.

According to spectre-meltdown-checker all three vulnerabilities are 
mitigated.

Shade and sweet water!

	Stephan

-- 
| Public Keys: http://fsing.rootsland.net/~stse/keys.html |

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Thread

Is Debian Linux protected against the Meltdown and Spectre security flaws? Turritopsis Dohrnii Teo En Ming <tdteoenming@gmail.com> - 2018-02-19 14:20 +0100
  Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-19 14:40 +0100
    Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Roberto C. Sánchez <roberto@debian.org> - 2018-02-19 15:30 +0100
    Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Andy Smith <andy@strugglers.net> - 2018-02-20 06:00 +0100
      Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-02-20 14:50 +0100
  Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-02-19 15:20 +0100
    Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-19 18:00 +0100
      Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Reco <recoverym4n@gmail.com> - 2018-02-19 18:10 +0100
        Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-19 18:50 +0100
          Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Reco <recoverym4n@gmail.com> - 2018-02-19 19:10 +0100
            Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Lange <klappnase@freenet.de> - 2018-02-19 19:40 +0100
      Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Lange <klappnase@freenet.de> - 2018-02-19 19:30 +0100
        Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-19 20:10 +0100
          Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Lange <klappnase@freenet.de> - 2018-02-19 20:20 +0100
            Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-19 22:30 +0100
              Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Andy Smith <andy@strugglers.net> - 2018-02-20 06:10 +0100
                Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-20 09:30 +0100
                Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Lange <klappnase@freenet.de> - 2018-02-20 11:10 +0100
                Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Fothergill <michael.fothergill@gmail.com> - 2018-02-20 16:00 +0100
                Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Stephan Seitz <stse+debian@fsing.rootsland.net> - 2018-02-20 10:20 +0100
                Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Andy Smith <andy@strugglers.net> - 2018-02-20 16:20 +0100
  Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Brad Rogers <brad@fineby.me.uk> - 2018-02-19 15:20 +0100
    Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Lange <klappnase@freenet.de> - 2018-02-19 19:40 +0100
      Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Brad Rogers <brad@fineby.me.uk> - 2018-02-19 20:20 +0100
      Re: Is Debian Linux protected against the Meltdown and Spectre security flaws? Gene Heskett <gheskett@shentel.net> - 2018-02-19 21:30 +0100
        Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Greg Wooledge <wooledg@eeg.ccf.org> - 2018-02-19 21:50 +0100
          Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Michael Lange <klappnase@freenet.de> - 2018-02-20 00:20 +0100
          Re: Is Debian Linux protected against the Meltdown and Spectre security flaws? Gene Heskett <gheskett@shentel.net> - 2018-02-20 00:30 +0100
    Re: Is Debian Linux protected against the Meltdown and Spectre  security flaws? Vincent Lefevre <vincent@vinc17.net> - 2018-02-27 17:10 +0100

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