10:50 a.m.
Hello,
nice to see integration of Spectre-Meltdown info in 4.1.9, both for guests
and hosts, as detailed in release notes:
I have upgraded my CentOS 7.4 engine VM (outside of oVirt cluster) and one
oVirt host to 4.1.9.
Now in General -> Software subtab of the host I see:
OS Version: RHEL - 7 - 4.1708.el7.centos
OS Description: CentOS Linux 7 (Core)
Kernel Version: 3.10.0 - 693.17.1.el7.x86_64
Kernel Features: IBRS: 0, PTI: 1, IBPB: 0
Am I supposed to manually set any particular value?
If I run version 0.32 (updated yesterday) of spectre-meltdown-checker.sh I
got this on my Dell M610 blade with
Version: 6.4.0
Release Date: 07/18/2013
[root@ov200 ~]# /home/g.cecchi/spectre-meltdown-checker.sh
Spectre and Meltdown mitigation detection tool v0.32
Checking for vulnerabilities on current system
Kernel is Linux 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58 UTC
2018 x86_64
CPU is Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO):
NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Checking count of LFENCE opcodes in kernel: YES
STATUS: NOT VULNERABLE (107 opcodes found, which is >= 70,
heuristic to
be improved when official patches become available)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: YES
* Currently enabled features
* IBRS enabled for Kernel space: NO (echo 1 >
/sys/kernel/debug/x86/ibrs_enabled)
* IBRS enabled for User space: NO (echo 2 >
/sys/kernel/debug/x86/ibrs_enabled)
* IBPB enabled: NO (echo 1 > /sys/kernel/debug/x86/ibpb_enabled)
* Mitigation 2
* Kernel compiled with retpoline option: NO
* Kernel compiled with a retpoline-aware compiler: NO
* Retpoline enabled: NO
STATUS: VULNERABLE (IBRS hardware + kernel support OR kernel with
retpoline are needed to mitigate the vulnerability)
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
STATUS: NOT VULNERABLE (PTI mitigates the vulnerability)
A false sense of security is worse than no security at all, see --disclaimer
[root@ov200 ~]#
So it seems I'm still vulnerable only to Variant 2, but kernel seems ok:
* Kernel is compiled with IBRS/IBPB support: YES
while bios not, correct?
Is RH EL / CentOS expected to follow the retpoline option too, to mitigate
Variant 2, as done by Fedora for example?
Eg on my just updated Fedora 27 laptop I get now:
[g.cecchi@ope46 spectre_meltdown]$ sudo ./spectre-meltdown-checker.sh
[sudo] password for g.cecchi:
Spectre and Meltdown mitigation detection tool v0.32
Checking for vulnerabilities on current system
Kernel is Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19 13:19:54 UTC 2018
x86_64
CPU is Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO):
NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Mitigated according to the /sys interface: NO (kernel confirms your
system is vulnerable)
STATUS: VULNERABLE (Vulnerable)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sys interface: YES (kernel confirms that
the mitigation is active)
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: NO
* Currently enabled features
* IBRS enabled for Kernel space: NO
* IBRS enabled for User space: NO
* IBPB enabled: NO
* Mitigation 2
* Kernel compiled with retpoline option: YES
* Kernel compiled with a retpoline-aware compiler: YES (kernel reports
full retpoline compilation)
* Retpoline enabled: YES
STATUS: NOT VULNERABLE (Mitigation: Full generic retpoline)
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Mitigated according to the /sys interface: YES (kernel confirms that
the mitigation is active)
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
STATUS: NOT VULNERABLE (Mitigation: PTI)
A false sense of security is worse than no security at all, see --disclaimer
[g.cecchi@ope46 spectre_meltdown]$
BTW: I updated some days ago this laptop from F26 to F27 and I remember
Variant 1 was fixed in F26, while now I see it as vulnerable..... I'm going
to check with Fedora mailing list about this...
Another question: what should I see for a VM instead related to
meltdown/spectre?
Currently in "Guest CPU Type" in General subtab of the VM I only see
"Westmere"..
Should I also see anythin aout IBRS, etc...?
Thanks,
Gianluca
11:28 a.m.
forgot to mention that the latest microcode update was a rollback of
previous updates:)
more info you can find there:
https://access.redhat.com/errata/RHSA-2018:0093
Am 26.01.2018 10:50 vorm. schrieb "Gianluca Cecchi" <
gianluca.cecchi(a)gmail.com>:
Hello,
nice to see integration of Spectre-Meltdown info in 4.1.9, both for guests
and hosts, as detailed in release notes:
I have upgraded my CentOS 7.4 engine VM (outside of oVirt cluster) and one
oVirt host to 4.1.9.
Now in General -> Software subtab of the host I see:
OS Version: RHEL - 7 - 4.1708.el7.centos
OS Description: CentOS Linux 7 (Core)
Kernel Version: 3.10.0 - 693.17.1.el7.x86_64
Kernel Features: IBRS: 0, PTI: 1, IBPB: 0
Am I supposed to manually set any particular value?
If I run version 0.32 (updated yesterday) of spectre-meltdown-checker.sh I
got this on my Dell M610 blade with
Version: 6.4.0
Release Date: 07/18/2013
[root@ov200 ~]# /home/g.cecchi/spectre-meltdown-checker.sh
Spectre and Meltdown mitigation detection tool v0.32
Checking for vulnerabilities on current system
Kernel is Linux 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58 UTC
2018 x86_64
CPU is Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO):
NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Checking count of LFENCE opcodes in kernel: YES
> STATUS: NOT VULNERABLE (107 opcodes found, which is >= 70, heuristic
to be improved when official patches become available)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: YES
* Currently enabled features
* IBRS enabled for Kernel space: NO (echo 1 >
/sys/kernel/debug/x86/ibrs_enabled)
* IBRS enabled for User space: NO (echo 2 >
/sys/kernel/debug/x86/ibrs_enabled)
* IBPB enabled: NO (echo 1 > /sys/kernel/debug/x86/ibpb_enabled)
* Mitigation 2
* Kernel compiled with retpoline option: NO
* Kernel compiled with a retpoline-aware compiler: NO
* Retpoline enabled: NO
> STATUS: VULNERABLE (IBRS hardware + kernel support OR kernel with
retpoline are needed to mitigate the vulnerability)
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
> STATUS: NOT VULNERABLE (PTI mitigates the vulnerability)
A false sense of security is worse than no security at all, see
--disclaimer
[root@ov200 ~]#
So it seems I'm still vulnerable only to Variant 2, but kernel seems ok:
* Kernel is compiled with IBRS/IBPB support: YES
while bios not, correct?
Is RH EL / CentOS expected to follow the retpoline option too, to mitigate
Variant 2, as done by Fedora for example?
Eg on my just updated Fedora 27 laptop I get now:
[g.cecchi@ope46 spectre_meltdown]$ sudo ./spectre-meltdown-checker.sh
[sudo] password for g.cecchi:
Spectre and Meltdown mitigation detection tool v0.32
Checking for vulnerabilities on current system
Kernel is Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19 13:19:54 UTC
2018 x86_64
CPU is Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown (RDCL_NO):
NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Mitigated according to the /sys interface: NO (kernel confirms your
system is vulnerable)
> STATUS: VULNERABLE (Vulnerable)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sys interface: YES (kernel confirms that
the mitigation is active)
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: NO
* Currently enabled features
* IBRS enabled for Kernel space: NO
* IBRS enabled for User space: NO
* IBPB enabled: NO
* Mitigation 2
* Kernel compiled with retpoline option: YES
* Kernel compiled with a retpoline-aware compiler: YES (kernel reports
full retpoline compilation)
* Retpoline enabled: YES
> STATUS: NOT VULNERABLE (Mitigation: Full generic retpoline)
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Mitigated according to the /sys interface: YES (kernel confirms that
the mitigation is active)
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
> STATUS: NOT VULNERABLE (Mitigation: PTI)
A false sense of security is worse than no security at all, see
--disclaimer
[g.cecchi@ope46 spectre_meltdown]$
BTW: I updated some days ago this laptop from F26 to F27 and I remember
Variant 1 was fixed in F26, while now I see it as vulnerable..... I'm going
to check with Fedora mailing list about this...
Another question: what should I see for a VM instead related to
meltdown/spectre?
Currently in "Guest CPU Type" in General subtab of the VM I only see
"Westmere"..
Should I also see anythin aout IBRS, etc...?
Thanks,
Gianluca
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
7:13 p.m.
This is a multi-part message in MIME format.
--------------57A7F57C0CE06CE5872A9956
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
That cpu is X5690. That is Westmere class. We have a number of those
doing 'meatball' application loads that don't need the latest greatest cpu.
I do not yet believe the Microcode fix for Westmere is out yet and it
may never be.
Intel has, so far, promised fixes for Haswell or better (i.e. CPUs from
the last 5 years) with a vague mention of other cpus on a 'customer'
need basis.
Westmere is circa 2010 and came out before Sandy/Ivy Bridge so we don't
know when or if they will be fixed, but probably only after the
Sandy/Ivy Bridges get theirs.
-wk
On 1/26/2018 1:50 AM, Gianluca Cecchi wrote:
Hello,
nice to see integration of Spectre-Meltdown info in 4.1.9, both for
guests and hosts, as detailed in release notes:
I have upgraded my CentOS 7.4 engine VM (outside of oVirt cluster) and
one oVirt host to 4.1.9.
Now in General -> Software subtab of the host I see:
OS Version: RHEL - 7 - 4.1708.el7.centos
OS Description: CentOS Linux 7 (Core)
Kernel Version: 3.10.0 - 693.17.1.el7.x86_64
Kernel Features: IBRS: 0, PTI: 1, IBPB: 0
Am I supposed to manually set any particular value?
If I run version 0.32 (updated yesterday)
of spectre-meltdown-checker.sh I got this on my Dell M610 blade with
Version: 6.4.0
Release Date: 07/18/2013
[root@ov200 ~]# /home/g.cecchi/spectre-meltdown-checker.sh
Spectre and Meltdown mitigation detection tool v0.32
Checking for vulnerabilities on current system
Kernel is Linux 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58
UTC 2018 x86_64
CPU is Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown
(RDCL_NO): NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Checking count of LFENCE opcodes in kernel: YES
> STATUS: NOT VULNERABLE (107 opcodes found, which is >= 70,
heuristic to be improved when official patches become available)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: YES
* Currently enabled features
* IBRS enabled for Kernel space: NO (echo 1 >
/sys/kernel/debug/x86/ibrs_enabled)
* IBRS enabled for User space: NO (echo 2 >
/sys/kernel/debug/x86/ibrs_enabled)
* IBPB enabled: NO (echo 1 > /sys/kernel/debug/x86/ibpb_enabled)
* Mitigation 2
* Kernel compiled with retpoline option: NO
* Kernel compiled with a retpoline-aware compiler: NO
* Retpoline enabled: NO
> STATUS: VULNERABLE (IBRS hardware + kernel support OR kernel with
retpoline are needed to mitigate the vulnerability)
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
> STATUS: NOT VULNERABLE (PTI mitigates the vulnerability)
A false sense of security is worse than no security at all, see
--disclaimer
[root@ov200 ~]#
So it seems I'm still vulnerable only to Variant 2, but kernel seems ok:
* Kernel is compiled with IBRS/IBPB support: YES
while bios not, correct?
Is RH EL / CentOS expected to follow the retpoline option too, to
mitigate Variant 2, as done by Fedora for example?
Eg on my just updated Fedora 27 laptop I get now:
[g.cecchi@ope46 spectre_meltdown]$ sudo ./spectre-meltdown-checker.sh
[sudo] password for g.cecchi:
Spectre and Meltdown mitigation detection tool v0.32
Checking for vulnerabilities on current system
Kernel is Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19 13:19:54 UTC
2018 x86_64
CPU is Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz
Hardware check
* Hardware support (CPU microcode) for mitigation techniques
* Indirect Branch Restricted Speculation (IBRS)
* SPEC_CTRL MSR is available: NO
* CPU indicates IBRS capability: NO
* Indirect Branch Prediction Barrier (IBPB)
* PRED_CMD MSR is available: NO
* CPU indicates IBPB capability: NO
* Single Thread Indirect Branch Predictors (STIBP)
* SPEC_CTRL MSR is available: NO
* CPU indicates STIBP capability: NO
* Enhanced IBRS (IBRS_ALL)
* CPU indicates ARCH_CAPABILITIES MSR availability: NO
* ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
* CPU explicitly indicates not being vulnerable to Meltdown
(RDCL_NO): NO
* CPU vulnerability to the three speculative execution attacks variants
* Vulnerable to Variant 1: YES
* Vulnerable to Variant 2: YES
* Vulnerable to Variant 3: YES
CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
* Mitigated according to the /sys interface: NO (kernel confirms
your system is vulnerable)
> STATUS: VULNERABLE (Vulnerable)
CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sys interface: YES (kernel confirms
that the mitigation is active)
* Mitigation 1
* Kernel is compiled with IBRS/IBPB support: NO
* Currently enabled features
* IBRS enabled for Kernel space: NO
* IBRS enabled for User space: NO
* IBPB enabled: NO
* Mitigation 2
* Kernel compiled with retpoline option: YES
* Kernel compiled with a retpoline-aware compiler: YES (kernel
reports full retpoline compilation)
* Retpoline enabled: YES
> STATUS: NOT VULNERABLE (Mitigation: Full generic retpoline)
CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
* Mitigated according to the /sys interface: YES (kernel confirms
that the mitigation is active)
* Kernel supports Page Table Isolation (PTI): YES
* PTI enabled and active: YES
* Running as a Xen PV DomU: NO
> STATUS: NOT VULNERABLE (Mitigation: PTI)
A false sense of security is worse than no security at all, see
--disclaimer
[g.cecchi@ope46 spectre_meltdown]$
BTW: I updated some days ago this laptop from F26 to F27 and I
remember Variant 1 was fixed in F26, while now I see it as
vulnerable..... I'm going to check with Fedora mailing list about this...
Another question: what should I see for a VM instead related to
meltdown/spectre?
Currently in "Guest CPU Type" in General subtab of the VM I only see
"Westmere"..
Should I also see anythin aout IBRS, etc...?
Thanks,
Gianluca
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--------------57A7F57C0CE06CE5872A9956
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<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>That cpu is X5690. That is Westmere class. We have a number of
those doing 'meatball' application loads that don't need the
latest greatest cpu.<br>
</p>
<p>I do not yet believe the Microcode fix for Westmere is out yet
and it may never be.<br>
</p>
<p>Intel has, so far, promised fixes for Haswell or better (i.e.
CPUs from the last 5 years) with a vague mention of other cpus on
a 'customer' need basis. <br>
</p>
<p>Westmere is circa 2010 and came out before Sandy/Ivy Bridge so we
don't know when or if they will be fixed, but probably only after
the Sandy/Ivy Bridges get theirs.<br>
</p>
-wk<br>
<br>
<p><br>
</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 1/26/2018 1:50 AM, Gianluca Cecchi
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAG2kNCzASMzOjhoRKbLHvK4HTh1JAjZN29-EV-m1De1L9QAzOw@mail.gmail.com">
<meta http-equiv="Context-Type" content="text/html;
charset=UTF-8">
<div dir="ltr">Hello,
<div>nice to see integration of Spectre-Meltdown info in 4.1.9,
both for guests and hosts, as detailed in release notes:</div>
<div><br>
</div>
<div>I have upgraded my CentOS 7.4 engine VM (outside of oVirt
cluster) and one oVirt host to 4.1.9.</div>
<div><br>
</div>
<div>Now in General -> Software subtab of the host I
see:</div>
<div><br>
</div>
<div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row0_label">OS
Version: RHEL - 7 - 4.1708.el7.centos</div>
</div>
</div>
</div>
</div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row1_label">OS
Description: CentOS Linux 7 (Core)</div>
</div>
</div>
</div>
</div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row2_label">Kernel
Version: 3.10.0 - 693.17.1.el7.x86_64</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row9_label">Kernel
Features: IBRS: 0, PTI: 1, IBPB: 0</div>
</div>
</div>
</div>
</div>
<br>
</div>
<div>Am I supposed to manually set any particular value?</div>
<div><br>
</div>
<div>If I run version 0.32 (updated yesterday)
of spectre-meltdown-checker.sh I got this on my Dell M610
blade with </div>
<div><br>
</div>
<div>
<div> Version: 6.4.0</div>
<div> Release Date: 07/18/2013</div>
</div>
<div><br>
</div>
<div>
<div>[root@ov200 ~]#
/home/g.cecchi/spectre-meltdown-checker.sh </div>
<div>Spectre and Meltdown mitigation detection tool v0.32</div>
<div><br>
</div>
<div>Checking for vulnerabilities on current system</div>
<div>Kernel is Linux 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan
25 20:13:58 UTC 2018 x86_64</div>
<div>CPU is Intel(R) Xeon(R) CPU X5690 @ 3.47GHz</div>
<div><br>
</div>
<div>Hardware check</div>
<div>* Hardware support (CPU microcode) for mitigation
techniques</div>
<div> * Indirect Branch Restricted Speculation (IBRS)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates IBRS capability: NO </div>
<div> * Indirect Branch Prediction Barrier (IBPB)</div>
<div> * PRED_CMD MSR is available: NO </div>
<div> * CPU indicates IBPB capability: NO </div>
<div> * Single Thread Indirect Branch Predictors (STIBP)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates STIBP capability: NO </div>
<div> * Enhanced IBRS (IBRS_ALL)</div>
<div> * CPU indicates ARCH_CAPABILITIES MSR availability:
NO </div>
<div> * ARCH_CAPABILITIES MSR advertises IBRS_ALL
capability: NO </div>
<div> * CPU explicitly indicates not being vulnerable to
Meltdown (RDCL_NO): NO </div>
<div>* CPU vulnerability to the three speculative execution
attacks variants</div>
<div> * Vulnerable to Variant 1: YES </div>
<div> * Vulnerable to Variant 2: YES </div>
<div> * Vulnerable to Variant 3: YES </div>
<div><br>
</div>
<div>CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant
1'</div>
<div>* Checking count of LFENCE opcodes in kernel: YES </div>
<div>> STATUS: NOT VULNERABLE (107 opcodes found, which
is >= 70, heuristic to be improved when official patches
become available)</div>
<div><br>
</div>
<div>CVE-2017-5715 [branch target injection] aka 'Spectre
Variant 2'</div>
<div>* Mitigation 1</div>
<div> * Kernel is compiled with IBRS/IBPB support: YES </div>
<div> * Currently enabled features</div>
<div> * IBRS enabled for Kernel space: NO (echo 1 >
/sys/kernel/debug/x86/ibrs_enabled)</div>
<div> * IBRS enabled for User space: NO (echo 2 >
/sys/kernel/debug/x86/ibrs_enabled)</div>
<div> * IBPB enabled: NO (echo 1 >
/sys/kernel/debug/x86/ibpb_enabled)</div>
<div>* Mitigation 2</div>
<div> * Kernel compiled with retpoline option: NO </div>
<div> * Kernel compiled with a retpoline-aware compiler:
NO </div>
<div> * Retpoline enabled: NO </div>
<div>> STATUS: VULNERABLE (IBRS hardware + kernel support
OR kernel with retpoline are needed to mitigate the
vulnerability)</div>
<div><br>
</div>
<div>CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka
'Variant 3'</div>
<div>* Kernel supports Page Table Isolation (PTI): YES </div>
<div>* PTI enabled and active: YES </div>
<div>* Running as a Xen PV DomU: NO </div>
<div>> STATUS: NOT VULNERABLE (PTI mitigates the
vulnerability)</div>
<div><br>
</div>
<div>A false sense of security is worse than no security at
all, see --disclaimer</div>
<div>[root@ov200 ~]# </div>
</div>
<div><br>
</div>
<div>So it seems I'm still vulnerable only to Variant 2, but
kernel seems ok:</div>
<div><br>
</div>
<div><span> * Kernel is compiled with IBRS/IBPB support:
YES </span><br>
</div>
<div><span><br>
</span></div>
<div>while bios not, correct?</div>
<div><br>
</div>
<div>Is RH EL / CentOS expected to follow the retpoline option
too, to mitigate Variant 2, as done by Fedora for example?</div>
<div><br>
</div>
<div>Eg on my just updated Fedora 27 laptop I get now:</div>
<div><br>
</div>
<div>
<div>[g.cecchi@ope46 spectre_meltdown]$ sudo
./spectre-meltdown-checker.sh</div>
<div>[sudo] password for g.cecchi: </div>
<div>Spectre and Meltdown mitigation detection tool v0.32</div>
<div><br>
</div>
<div>Checking for vulnerabilities on current system</div>
<div>Kernel is Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19
13:19:54 UTC 2018 x86_64</div>
<div>CPU is Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz</div>
<div><br>
</div>
<div>Hardware check</div>
<div>* Hardware support (CPU microcode) for mitigation
techniques</div>
<div> * Indirect Branch Restricted Speculation (IBRS)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates IBRS capability: NO </div>
<div> * Indirect Branch Prediction Barrier (IBPB)</div>
<div> * PRED_CMD MSR is available: NO </div>
<div> * CPU indicates IBPB capability: NO </div>
<div> * Single Thread Indirect Branch Predictors (STIBP)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates STIBP capability: NO </div>
<div> * Enhanced IBRS (IBRS_ALL)</div>
<div> * CPU indicates ARCH_CAPABILITIES MSR availability:
NO </div>
<div> * ARCH_CAPABILITIES MSR advertises IBRS_ALL
capability: NO </div>
<div> * CPU explicitly indicates not being vulnerable to
Meltdown (RDCL_NO): NO </div>
<div>* CPU vulnerability to the three speculative execution
attacks variants</div>
<div> * Vulnerable to Variant 1: YES </div>
<div> * Vulnerable to Variant 2: YES </div>
<div> * Vulnerable to Variant 3: YES </div>
<div><br>
</div>
<div>CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant
1'</div>
<div>* Mitigated according to the /sys interface: NO (kernel
confirms your system is vulnerable)</div>
<div>> STATUS: VULNERABLE (Vulnerable)</div>
<div><br>
</div>
<div>CVE-2017-5715 [branch target injection] aka 'Spectre
Variant 2'</div>
<div>* Mitigated according to the /sys interface: YES
(kernel confirms that the mitigation is active)</div>
<div>* Mitigation 1</div>
<div> * Kernel is compiled with IBRS/IBPB support: NO </div>
<div> * Currently enabled features</div>
<div> * IBRS enabled for Kernel space: NO </div>
<div> * IBRS enabled for User space: NO </div>
<div> * IBPB enabled: NO </div>
<div>* Mitigation 2</div>
<div> * Kernel compiled with retpoline option: YES </div>
<div> * Kernel compiled with a retpoline-aware compiler:
YES (kernel reports full retpoline compilation)</div>
<div> * Retpoline enabled: YES </div>
<div>> STATUS: NOT VULNERABLE (Mitigation: Full generic
retpoline)</div>
<div><br>
</div>
<div>CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka
'Variant 3'</div>
<div>* Mitigated according to the /sys interface: YES
(kernel confirms that the mitigation is active)</div>
<div>* Kernel supports Page Table Isolation (PTI): YES </div>
<div>* PTI enabled and active: YES </div>
<div>* Running as a Xen PV DomU: NO </div>
<div>> STATUS: NOT VULNERABLE (Mitigation: PTI)</div>
<div><br>
</div>
<div>A false sense of security is worse than no security at
all, see --disclaimer</div>
<div>[g.cecchi@ope46 spectre_meltdown]$</div>
</div>
<div><br>
</div>
<div>BTW: I updated some days ago this laptop from F26 to F27
and I remember Variant 1 was fixed in F26, while now I see it
as vulnerable..... I'm going to check with Fedora mailing list
about this...</div>
<div><br>
</div>
<div>Another question: what should I see for a VM instead
related to meltdown/spectre?</div>
<div>Currently in "Guest CPU Type" in General subtab of the VM I
only see "Westmere"..</div>
<div>Should I also see anythin aout IBRS, etc...?</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Gianluca </div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
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href="mailto:Users@ovirt.org">Users@ovirt.org</a>
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href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
</blockquote>
<br>
</body>
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--------------57A7F57C0CE06CE5872A9956--
1:42 a.m.
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Content-Transfer-Encoding: 8bit
Updated info:
https://newsroom.intel.com/wp-content/uploads/sites/11/2018/01/microcode-...
Looks like Intel is now committing to support Sandy/Ivy Bridge.
No mention of Westmere or earlier as of yet :-(
On 1/26/2018 10:13 AM, WK wrote:
That cpu is X5690. That is Westmere class. We have a number of
those doing 'meatball' application loads that don't need the latest
greatest cpu.
I do not yet believe the Microcode fix for Westmere is out yet and it
may never be.
Intel has, so far, promised fixes for Haswell or better (i.e. CPUs
from the last 5 years) with a vague mention of other cpus on a
'customer' need basis.
Westmere is circa 2010 and came out before Sandy/Ivy Bridge so we
don't know when or if they will be fixed, but probably only after the
Sandy/Ivy Bridges get theirs.
-wk
On 1/26/2018 1:50 AM, Gianluca Cecchi wrote:
> Hello,
> nice to see integration of Spectre-Meltdown info in 4.1.9, both for
> guests and hosts, as detailed in release notes:
>
> I have upgraded my CentOS 7.4 engine VM (outside of oVirt cluster)
> and one oVirt host to 4.1.9.
>
> Now in General -> Software subtab of the host I see:
>
> OS Version: RHEL - 7 - 4.1708.el7.centos
> OS Description: CentOS Linux 7 (Core)
> Kernel Version: 3.10.0 - 693.17.1.el7.x86_64
> Kernel Features: IBRS: 0, PTI: 1, IBPB: 0
>
> Am I supposed to manually set any particular value?
>
> If I run version 0.32 (updated yesterday)
> of spectre-meltdown-checker.sh I got this on my Dell M610 blade with
>
> Version: 6.4.0
> Release Date: 07/18/2013
>
> [root@ov200 ~]# /home/g.cecchi/spectre-meltdown-checker.sh
> Spectre and Meltdown mitigation detection tool v0.32
>
> Checking for vulnerabilities on current system
> Kernel is Linux 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58
> UTC 2018 x86_64
> CPU is Intel(R) Xeon(R) CPU X5690 @ 3.47GHz
>
> Hardware check
> * Hardware support (CPU microcode) for mitigation techniques
> * Indirect Branch Restricted Speculation (IBRS)
> * SPEC_CTRL MSR is available: NO
> * CPU indicates IBRS capability: NO
> * Indirect Branch Prediction Barrier (IBPB)
> * PRED_CMD MSR is available: NO
> * CPU indicates IBPB capability: NO
> * Single Thread Indirect Branch Predictors (STIBP)
> * SPEC_CTRL MSR is available: NO
> * CPU indicates STIBP capability: NO
> * Enhanced IBRS (IBRS_ALL)
> * CPU indicates ARCH_CAPABILITIES MSR availability: NO
> * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
> * CPU explicitly indicates not being vulnerable to Meltdown
> (RDCL_NO): NO
> * CPU vulnerability to the three speculative execution attacks variants
> * Vulnerable to Variant 1: YES
> * Vulnerable to Variant 2: YES
> * Vulnerable to Variant 3: YES
>
> CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
> * Checking count of LFENCE opcodes in kernel: YES
> > STATUS: NOT VULNERABLE (107 opcodes found, which is >= 70,
> heuristic to be improved when official patches become available)
>
> CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
> * Mitigation 1
> * Kernel is compiled with IBRS/IBPB support: YES
> * Currently enabled features
> * IBRS enabled for Kernel space: NO (echo 1 >
> /sys/kernel/debug/x86/ibrs_enabled)
> * IBRS enabled for User space: NO (echo 2 >
> /sys/kernel/debug/x86/ibrs_enabled)
> * IBPB enabled: NO (echo 1 > /sys/kernel/debug/x86/ibpb_enabled)
> * Mitigation 2
> * Kernel compiled with retpoline option: NO
> * Kernel compiled with a retpoline-aware compiler: NO
> * Retpoline enabled: NO
> > STATUS: VULNERABLE (IBRS hardware + kernel support OR kernel with
> retpoline are needed to mitigate the vulnerability)
>
> CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
> * Kernel supports Page Table Isolation (PTI): YES
> * PTI enabled and active: YES
> * Running as a Xen PV DomU: NO
> > STATUS: NOT VULNERABLE (PTI mitigates the vulnerability)
>
> A false sense of security is worse than no security at all, see
> --disclaimer
> [root@ov200 ~]#
>
> So it seems I'm still vulnerable only to Variant 2, but kernel seems ok:
>
> * Kernel is compiled with IBRS/IBPB support: YES
>
> while bios not, correct?
>
> Is RH EL / CentOS expected to follow the retpoline option too, to
> mitigate Variant 2, as done by Fedora for example?
>
> Eg on my just updated Fedora 27 laptop I get now:
>
> [g.cecchi@ope46 spectre_meltdown]$ sudo ./spectre-meltdown-checker.sh
> [sudo] password for g.cecchi:
> Spectre and Meltdown mitigation detection tool v0.32
>
> Checking for vulnerabilities on current system
> Kernel is Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan 19 13:19:54
> UTC 2018 x86_64
> CPU is Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz
>
> Hardware check
> * Hardware support (CPU microcode) for mitigation techniques
> * Indirect Branch Restricted Speculation (IBRS)
> * SPEC_CTRL MSR is available: NO
> * CPU indicates IBRS capability: NO
> * Indirect Branch Prediction Barrier (IBPB)
> * PRED_CMD MSR is available: NO
> * CPU indicates IBPB capability: NO
> * Single Thread Indirect Branch Predictors (STIBP)
> * SPEC_CTRL MSR is available: NO
> * CPU indicates STIBP capability: NO
> * Enhanced IBRS (IBRS_ALL)
> * CPU indicates ARCH_CAPABILITIES MSR availability: NO
> * ARCH_CAPABILITIES MSR advertises IBRS_ALL capability: NO
> * CPU explicitly indicates not being vulnerable to Meltdown
> (RDCL_NO): NO
> * CPU vulnerability to the three speculative execution attacks variants
> * Vulnerable to Variant 1: YES
> * Vulnerable to Variant 2: YES
> * Vulnerable to Variant 3: YES
>
> CVE-2017-5753 [bounds check bypass] aka 'Spectre Variant 1'
> * Mitigated according to the /sys interface: NO (kernel confirms
> your system is vulnerable)
> > STATUS: VULNERABLE (Vulnerable)
>
> CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
> * Mitigated according to the /sys interface: YES (kernel confirms
> that the mitigation is active)
> * Mitigation 1
> * Kernel is compiled with IBRS/IBPB support: NO
> * Currently enabled features
> * IBRS enabled for Kernel space: NO
> * IBRS enabled for User space: NO
> * IBPB enabled: NO
> * Mitigation 2
> * Kernel compiled with retpoline option: YES
> * Kernel compiled with a retpoline-aware compiler: YES (kernel
> reports full retpoline compilation)
> * Retpoline enabled: YES
> > STATUS: NOT VULNERABLE (Mitigation: Full generic retpoline)
>
> CVE-2017-5754 [rogue data cache load] aka 'Meltdown' aka 'Variant 3'
> * Mitigated according to the /sys interface: YES (kernel confirms
> that the mitigation is active)
> * Kernel supports Page Table Isolation (PTI): YES
> * PTI enabled and active: YES
> * Running as a Xen PV DomU: NO
> > STATUS: NOT VULNERABLE (Mitigation: PTI)
>
> A false sense of security is worse than no security at all, see
> --disclaimer
> [g.cecchi@ope46 spectre_meltdown]$
>
> BTW: I updated some days ago this laptop from F26 to F27 and I
> remember Variant 1 was fixed in F26, while now I see it as
> vulnerable..... I'm going to check with Fedora mailing list about this...
>
> Another question: what should I see for a VM instead related to
> meltdown/spectre?
> Currently in "Guest CPU Type" in General subtab of the VM I only see
> "Westmere"..
> Should I also see anythin aout IBRS, etc...?
>
> Thanks,
>
> Gianluca
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
--------------B3ABF8DBBFEB48E9113AB092
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Updated info:<br>
</p>
<p><a class="moz-txt-link-freetext"
href="https://newsroom.intel.com/wp-content/uploads/sites/11/2018/01...
</p>
Looks like Intel is now committing to support Sandy/Ivy Bridge.<br>
<br>
No mention of Westmere or earlier as of yet :-(<br>
<br>
<br>
<div class="moz-cite-prefix">On 1/26/2018 10:13 AM, WK
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:debd85e3-599e-15dd-e1f5-b1e73c6f4294@bneit.com">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<p>That cpu is X5690. That is Westmere class. We have a number
of those doing 'meatball' application loads that don't need the
latest greatest cpu.<br>
</p>
<p>I do not yet believe the Microcode fix for Westmere is out yet
and it may never be.<br>
</p>
<p>Intel has, so far, promised fixes for Haswell or better (i.e.
CPUs from the last 5 years) with a vague mention of other cpus
on a 'customer' need basis. <br>
</p>
<p>Westmere is circa 2010 and came out before Sandy/Ivy Bridge so
we don't know when or if they will be fixed, but probably only
after the Sandy/Ivy Bridges get theirs.<br>
</p>
-wk<br>
<br>
<p><br>
</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 1/26/2018 1:50 AM, Gianluca Cecchi
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAG2kNCzASMzOjhoRKbLHvK4HTh1JAjZN29-EV-m1De1L9QAzOw@mail.gmail.com">
<meta http-equiv="Context-Type" content="text/html;
charset=UTF-8">
<div dir="ltr">Hello,
<div>nice to see integration of Spectre-Meltdown info in
4.1.9, both for guests and hosts, as detailed in release
notes:</div>
<div><br>
</div>
<div>I have upgraded my CentOS 7.4 engine VM (outside of oVirt
cluster) and one oVirt host to 4.1.9.</div>
<div><br>
</div>
<div>Now in General -> Software subtab of the host I
see:</div>
<div><br>
</div>
<div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row0_label">OS
Version: RHEL - 7 - 4.1708.el7.centos</div>
</div>
</div>
</div>
</div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row1_label">OS
Description: CentOS Linux 7 (Core)</div>
</div>
</div>
</div>
</div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row2_label">Kernel
Version: 3.10.0 - 693.17.1.el7.x86_64</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div class="gmail-row">
<div class="gmail-col-md-12">
<div class="gmail-row">
<div class="gmail-col-md-2">
<div class="gmail-GKIIXFICABD"
id="gmail-SubTabHostGeneralSoftwareView_formPanel_col0_row9_label">Kernel
Features: IBRS: 0, PTI: 1, IBPB: 0</div>
</div>
</div>
</div>
</div>
<br>
</div>
<div>Am I supposed to manually set any particular value?</div>
<div><br>
</div>
<div>If I run version 0.32 (updated yesterday)
of spectre-meltdown-checker.sh I got this on my Dell M610
blade with </div>
<div><br>
</div>
<div>
<div> Version: 6.4.0</div>
<div> Release Date: 07/18/2013</div>
</div>
<div><br>
</div>
<div>
<div>[root@ov200 ~]#
/home/g.cecchi/spectre-meltdown-checker.sh </div>
<div>Spectre and Meltdown mitigation detection tool v0.32</div>
<div><br>
</div>
<div>Checking for vulnerabilities on current system</div>
<div>Kernel is Linux 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu
Jan 25 20:13:58 UTC 2018 x86_64</div>
<div>CPU is Intel(R) Xeon(R) CPU X5690 @ 3.47GHz</div>
<div><br>
</div>
<div>Hardware check</div>
<div>* Hardware support (CPU microcode) for mitigation
techniques</div>
<div> * Indirect Branch Restricted Speculation (IBRS)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates IBRS capability: NO </div>
<div> * Indirect Branch Prediction Barrier (IBPB)</div>
<div> * PRED_CMD MSR is available: NO </div>
<div> * CPU indicates IBPB capability: NO </div>
<div> * Single Thread Indirect Branch Predictors (STIBP)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates STIBP capability: NO </div>
<div> * Enhanced IBRS (IBRS_ALL)</div>
<div> * CPU indicates ARCH_CAPABILITIES MSR
availability: NO </div>
<div> * ARCH_CAPABILITIES MSR advertises IBRS_ALL
capability: NO </div>
<div> * CPU explicitly indicates not being vulnerable to
Meltdown (RDCL_NO): NO </div>
<div>* CPU vulnerability to the three speculative execution
attacks variants</div>
<div> * Vulnerable to Variant 1: YES </div>
<div> * Vulnerable to Variant 2: YES </div>
<div> * Vulnerable to Variant 3: YES </div>
<div><br>
</div>
<div>CVE-2017-5753 [bounds check bypass] aka 'Spectre
Variant 1'</div>
<div>* Checking count of LFENCE opcodes in kernel: YES </div>
<div>> STATUS: NOT VULNERABLE (107 opcodes found, which
is >= 70, heuristic to be improved when official
patches become available)</div>
<div><br>
</div>
<div>CVE-2017-5715 [branch target injection] aka 'Spectre
Variant 2'</div>
<div>* Mitigation 1</div>
<div> * Kernel is compiled with IBRS/IBPB support: YES </div>
<div> * Currently enabled features</div>
<div> * IBRS enabled for Kernel space: NO (echo 1 >
/sys/kernel/debug/x86/ibrs_enabled)</div>
<div> * IBRS enabled for User space: NO (echo 2 >
/sys/kernel/debug/x86/ibrs_enabled)</div>
<div> * IBPB enabled: NO (echo 1 >
/sys/kernel/debug/x86/ibpb_enabled)</div>
<div>* Mitigation 2</div>
<div> * Kernel compiled with retpoline option: NO </div>
<div> * Kernel compiled with a retpoline-aware compiler:
NO </div>
<div> * Retpoline enabled: NO </div>
<div>> STATUS: VULNERABLE (IBRS hardware + kernel
support OR kernel with retpoline are needed to mitigate
the vulnerability)</div>
<div><br>
</div>
<div>CVE-2017-5754 [rogue data cache load] aka 'Meltdown'
aka 'Variant 3'</div>
<div>* Kernel supports Page Table Isolation (PTI): YES </div>
<div>* PTI enabled and active: YES </div>
<div>* Running as a Xen PV DomU: NO </div>
<div>> STATUS: NOT VULNERABLE (PTI mitigates the
vulnerability)</div>
<div><br>
</div>
<div>A false sense of security is worse than no security at
all, see --disclaimer</div>
<div>[root@ov200 ~]# </div>
</div>
<div><br>
</div>
<div>So it seems I'm still vulnerable only to Variant 2, but
kernel seems ok:</div>
<div><br>
</div>
<div><span> * Kernel is compiled with IBRS/IBPB support:
YES </span><br>
</div>
<div><span><br>
</span></div>
<div>while bios not, correct?</div>
<div><br>
</div>
<div>Is RH EL / CentOS expected to follow the retpoline option
too, to mitigate Variant 2, as done by Fedora for example?</div>
<div><br>
</div>
<div>Eg on my just updated Fedora 27 laptop I get now:</div>
<div><br>
</div>
<div>
<div>[g.cecchi@ope46 spectre_meltdown]$ sudo
./spectre-meltdown-checker.sh</div>
<div>[sudo] password for g.cecchi: </div>
<div>Spectre and Meltdown mitigation detection tool v0.32</div>
<div><br>
</div>
<div>Checking for vulnerabilities on current system</div>
<div>Kernel is Linux 4.14.14-300.fc27.x86_64 #1 SMP Fri Jan
19 13:19:54 UTC 2018 x86_64</div>
<div>CPU is Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz</div>
<div><br>
</div>
<div>Hardware check</div>
<div>* Hardware support (CPU microcode) for mitigation
techniques</div>
<div> * Indirect Branch Restricted Speculation (IBRS)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates IBRS capability: NO </div>
<div> * Indirect Branch Prediction Barrier (IBPB)</div>
<div> * PRED_CMD MSR is available: NO </div>
<div> * CPU indicates IBPB capability: NO </div>
<div> * Single Thread Indirect Branch Predictors (STIBP)</div>
<div> * SPEC_CTRL MSR is available: NO </div>
<div> * CPU indicates STIBP capability: NO </div>
<div> * Enhanced IBRS (IBRS_ALL)</div>
<div> * CPU indicates ARCH_CAPABILITIES MSR
availability: NO </div>
<div> * ARCH_CAPABILITIES MSR advertises IBRS_ALL
capability: NO </div>
<div> * CPU explicitly indicates not being vulnerable to
Meltdown (RDCL_NO): NO </div>
<div>* CPU vulnerability to the three speculative execution
attacks variants</div>
<div> * Vulnerable to Variant 1: YES </div>
<div> * Vulnerable to Variant 2: YES </div>
<div> * Vulnerable to Variant 3: YES </div>
<div><br>
</div>
<div>CVE-2017-5753 [bounds check bypass] aka 'Spectre
Variant 1'</div>
<div>* Mitigated according to the /sys interface: NO
(kernel confirms your system is vulnerable)</div>
<div>> STATUS: VULNERABLE (Vulnerable)</div>
<div><br>
</div>
<div>CVE-2017-5715 [branch target injection] aka 'Spectre
Variant 2'</div>
<div>* Mitigated according to the /sys interface: YES
(kernel confirms that the mitigation is active)</div>
<div>* Mitigation 1</div>
<div> * Kernel is compiled with IBRS/IBPB support: NO </div>
<div> * Currently enabled features</div>
<div> * IBRS enabled for Kernel space: NO </div>
<div> * IBRS enabled for User space: NO </div>
<div> * IBPB enabled: NO </div>
<div>* Mitigation 2</div>
<div> * Kernel compiled with retpoline option: YES </div>
<div> * Kernel compiled with a retpoline-aware compiler:
YES (kernel reports full retpoline compilation)</div>
<div> * Retpoline enabled: YES </div>
<div>> STATUS: NOT VULNERABLE (Mitigation: Full generic
retpoline)</div>
<div><br>
</div>
<div>CVE-2017-5754 [rogue data cache load] aka 'Meltdown'
aka 'Variant 3'</div>
<div>* Mitigated according to the /sys interface: YES
(kernel confirms that the mitigation is active)</div>
<div>* Kernel supports Page Table Isolation (PTI): YES </div>
<div>* PTI enabled and active: YES </div>
<div>* Running as a Xen PV DomU: NO </div>
<div>> STATUS: NOT VULNERABLE (Mitigation: PTI)</div>
<div><br>
</div>
<div>A false sense of security is worse than no security at
all, see --disclaimer</div>
<div>[g.cecchi@ope46 spectre_meltdown]$</div>
</div>
<div><br>
</div>
<div>BTW: I updated some days ago this laptop from F26 to F27
and I remember Variant 1 was fixed in F26, while now I see
it as vulnerable..... I'm going to check with Fedora mailing
list about this...</div>
<div><br>
</div>
<div>Another question: what should I see for a VM instead
related to meltdown/spectre?</div>
<div>Currently in "Guest CPU Type" in General subtab of the VM
I only see "Westmere"..</div>
<div>Should I also see anythin aout IBRS, etc...?</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Gianluca </div>
</div>
<br>
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Arman Khalatyan -
Gianluca Cecchi -
WK