Re: [ovirt-users] Ovirt 4.0 to 4.1 CentOS7.3 and libvirtd 2.0.0 segfault issue

Friday, 21 April 2017

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hello,

I am not sure.
I have simple openvpn client profile with systemd enabled on boot time, 
but I think I was not included it anywhere for libvirt/ovirt purpose.

also strange for me was statement that this interface was without IP - 
this interface should be up with IP after connection established... but 
anyway even if some dependencies occurs, then it should be handled 
somehow with proper error.

Regards,

Rafal Wojciechowski

W dniu 21.04.2017 o 17:41, Yaniv Kaul pisze:
...

 On Fri, Apr 21, 2017 at 4:38 PM, Rafał Wojciechowski 
 <it(a)rafalwojciechowski.pl <mailto:it@rafalwojciechowski.pl>> wrote:

     hi,

     my issue was related to bug in libvirtd.
     it was found in core dump by libvirt team

     "

     I'll send a patch to upstream libvirt to fix this crash.  However it can take
     a while to get it back to CentOS/RHEL.  The source of this crash is that you
     have a "tun0" network interface without IP address and that interface is
     checked before "ovirtmgmt" and it causes the crash.  You can workaround it
     by removing the "tun0" interface if it doesn't have any IP address.

     Pavel

     "

     workaround is working fine for me.

 Thanks for following this!
 Any idea how did you get to have the tun0 there in the first place?
 Y.

     Regards,
     Rafal Wojciechowski

     W dniu 18.04.2017 o 16:55, Rafał Wojciechowski pisze:
>
>     hi,
>
>     I was unable to just remove glibc and install it again - I have
>     reinstalled it and rebooted the machine but it was not fixed anything
>     Thanks anyway.
>
>     Regards,
>     Rafal Wojciechowski
>
>     W dniu 18.04.2017 o 10:53, Yanir Quinn pisze:
>>     Hi Rafal
>>     not sure it relates to your issue, but i experienced a similar
>>     issue with segfault (running on fedora 25)
>>     to resolve it i had to remove glibc packages and then install
>>     them again (maybe a same workaround for libvirt will do the job
>>     here)
>>
>>     Regards
>>     Yanir Quinn
>>
>>     On Tue, Apr 18, 2017 at 9:32 AM, Francesco Romani
>>     <fromani(a)redhat.com <mailto:fromani@redhat.com>> wrote:
>>
>>
>>
>>         On 04/18/2017 08:09 AM, Rafał Wojciechowski wrote:
>>         >
>>         > hello,
>>         >
>>         > I made comparison(+diff) between xml passing through vdsm
>>         which is
>>         > working and another one which cause libvirtd segfault
>>         >
>>         >
>>        
https://paste.fedoraproject.org/paste/eqpe8Byu2l-3SRdXc6LTLl5M1UNdIGYhyRL...
>>        
<https://paste.fedoraproject.org/paste/eqpe8Byu2l-3SRdXc6LTLl5M1UNdIGYhyRL...
>>         >
>>         >
>>         > I am not sure if below setting are fine but I dont know
>>         how to change them
>>         >
>>         > <model heads="1" ram="65536"
type="qxl" vgamem="16384"
>>         vram="8192" />
>>         > (I dont have so much ram and vgamem)
>>         >
>>
>>         those are kibibytes though
>>         (https://libvirt.org/formatdomain.html#elementsVideo
>>         <https://libvirt.org/formatdomain.html#elementsVideo>), are
>>         pretty
>>         conservarvative settings
>>         >
>>         > <graphics autoport="yes" defaultMode="secure"
passwd="*****"
>>         > passwdValidTo="1970-01-01T00:00:01" port="-1"
tlsPort="-1"
>>         type="spice">
>>         > (ports with "-"? maybe it is fine because of autoport
>>         settings...)
>>         >
>>
>>         Yes, "-1" means "autoallocation from libvirt".
>>         I don't see obvious issues in this XML, and, most
>>         importantly, one
>>         invalid XML should never cause libvirtd to segfault.
>>
>>         I'd file a libvirt bug.
>>
>>
>>         --
>>         Francesco Romani
>>         Senior SW Eng., Virtualization R&D
>>         Red Hat
>>         IRC: fromani github: @fromanirh
>>
>>         _______________________________________________
>>         Users mailing list
>>         Users(a)ovirt.org <mailto:Users@ovirt.org>
>>         http://lists.ovirt.org/mailman/listinfo/users
>>         <http://lists.ovirt.org/mailman/listinfo/users>
>>
>>
>
>
>
>     _______________________________________________
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    <p>hello,</p>
    <p>I am not sure.<br>
      I have simple openvpn client profile with systemd enabled on boot
      time, but I think I was not included it anywhere for libvirt/ovirt
      purpose. <br>
    </p>
    <p>also strange for me was statement that this interface was without
      IP - this interface should be up with IP after connection
      established... but anyway even if some dependencies occurs, then
      it should be handled somehow with proper error.</p>
    <p>Regards,</p>
    <p>Rafal Wojciechowski<br>
    </p>
    <br>
    <div class="moz-cite-prefix">W dniu 21.04.2017 o 17:41, Yaniv Kaul
      pisze:<br>
    </div>
    <blockquote
cite="mid:CAJgorsatj7dt1msdLe5Wbp9YMdXR7-=1kTcBgPBxDQgJGscvTg@mail.gmail.com"
      type="cite">
      <div dir="ltr"><br>
        <div class="gmail_extra"><br>
          <div class="gmail_quote">On Fri, Apr 21, 2017 at 4:38 PM,
            Rafał Wojciechowski <span dir="ltr">&lt;<a
                moz-do-not-send="true"
                href="mailto:it@rafalwojciechowski.pl"
target=&quot;_blank&quot;&gt;it(a)rafalwojciechowski.pl&lt;/a&gt;&amp;gt;&lt;/span&gt;
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div bgcolor="#FFFFFF" text="#000000">
                <p>hi,</p>
                <p>my issue was related to bug in libvirtd.<br>
                  it was found in core dump by libvirt team</p>
                <p>"</p>
                <pre>I'll send a patch to upstream libvirt to fix this crash. 
However it can take
a while to get it back to CentOS/RHEL.  The source of this crash is that you
have a "tun0" network interface without IP address and that interface is
checked before "ovirtmgmt" and it causes the crash.  You can workaround it
by removing the "tun0" interface if it doesn't have any IP address.

Pavel</pre>
                <p>"</p>
                <p>workaround is working fine for me.<br>
                </p>
              </div>
            </blockquote>
            <div><br>
            </div>
            <div>Thanks for following this!</div>
            <div>Any idea how did you get to have the tun0 there in the
              first place?</div>
            <div>Y.</div>
            <div><br>
            </div>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div bgcolor="#FFFFFF" text="#000000">
                <p> </p>
                Regards,<br>
                Rafal Wojciechowski<br>
                <br>
                <div class="m_-1723624399484766515moz-cite-prefix">W
                  dniu 18.04.2017 o 16:55, Rafał Wojciechowski pisze:<br>
                </div>
                <div>
                  <div class="h5">
                    <blockquote type="cite">
                      <p>hi,</p>
                      <p>I was unable to just remove glibc and install
                        it again - I have reinstalled it and rebooted
                        the machine but it was not fixed anything<br>
                        Thanks anyway.</p>
                      <p>Regards,<br>
                        Rafal Wojciechowski<br>
                      </p>
                      <div
class="m_-1723624399484766515moz-cite-prefix">W
                        dniu 18.04.2017 o 10:53, Yanir Quinn pisze:<br>
                      </div>
                      <blockquote type="cite">
                        <div dir="ltr">
                          <div>
                            <div>
                              <div>
                                <div>Hi Rafal<br>
                                </div>
                                not sure it relates to your issue, but i
                                experienced a similar issue with
                                segfault (running on fedora 25)<br>
                              </div>
                              to resolve it i had to remove glibc
                              packages and then install them again
                              (maybe a same workaround for libvirt will
                              do the job here)<br>
                              <br>
                            </div>
                            Regards<br>
                          </div>
                          Yanir Quinn<br>
                        </div>
                        <div class="gmail_extra"><br>
                          <div class="gmail_quote">On Tue, Apr 18, 2017
                            at 9:32 AM, Francesco Romani <span
                              dir="ltr">&lt;<a
moz-do-not-send="true"
                                href="mailto:fromani@redhat.com"

target=&quot;_blank&quot;&gt;fromani(a)redhat.com&lt;/a&gt;&amp;gt;&lt;/span&gt;
                            wrote:<br>
                            <blockquote class="gmail_quote"
                              style="margin:0 0 0 .8ex;border-left:1px
                              #ccc solid;padding-left:1ex"><span><br>
                                <br>
                                On 04/18/2017 08:09 AM, Rafał
                                Wojciechowski wrote:<br>
                                &gt;<br>
                                &gt; hello,<br>
                                &gt;<br>
                                &gt; I made comparison(+diff) between
                                xml passing through vdsm which is<br>
                                &gt; working and another one which cause
                                libvirtd segfault<br>
                                &gt;<br>
                                &gt; <a moz-do-not-send="true"
href="https://paste.fedoraproject.org/paste/eqpe8Byu2l-3SRdXc6LTLl5M...
                                  rel="noreferrer"
target="_blank">https://paste.fedoraproject.or<wbr>g/paste/eqpe8Byu2l-3SRdXc6LTLl<wbr>5M1UNdIGYhyRLivL9gydE=</a><br>
                                &gt;<br>
                                &gt;<br>
                                &gt; I am not sure if below setting are
                                fine but I dont know how to change them<br>
                                &gt;<br>
                                &gt; &lt;model heads="1"
ram="65536"
                                type="qxl" vgamem="16384"
vram="8192"
                                /&gt;<br>
                                &gt; (I dont have so much ram and
                                vgamem)<br>
                                &gt;<br>
                                <br>
                              </span>those are kibibytes though<br>
                              (<a moz-do-not-send="true"

href="https://libvirt.org/formatdomain.html#elementsVideo"
                                rel="noreferrer"
target="_blank">https://libvirt.org/formatdom<wbr>ain....>),
                              are pretty<br>
                              conservarvative settings<br>
                              <span>&gt;<br>
                                &gt; &lt;graphics autoport="yes"
                                defaultMode="secure"
passwd="*****"<br>
                                &gt;
passwdValidTo="1970-01-01T00:0<wbr>0:01"
                                port="-1" tlsPort="-1"
type="spice"&gt;<br>
                                &gt; (ports with "-"? maybe it is fine
                                because of autoport settings...)<br>
                                &gt;<br>
                                <br>
                              </span>Yes, "-1" means "autoallocation
                              from libvirt".<br>
                              I don't see obvious issues in this XML,
                              and, most importantly, one<br>
                              invalid XML should never cause libvirtd to
                              segfault.<br>
                              <br>
                              I'd file a libvirt bug.<br>
                              <span
class="m_-1723624399484766515HOEnZb"><font
                                  color="#888888"><br>
                                  <br>
                                  --<br>
                                  Francesco Romani<br>
                                  Senior SW Eng., Virtualization R&amp;D<br>
                                  Red Hat<br>
                                  IRC: fromani github: @fromanirh<br>
                                </font></span>
                              <div class="m_-1723624399484766515HOEnZb">
                                <div
class="m_-1723624399484766515h5"><br>

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Re: [ovirt-users] Ovirt 4.0 to 4.1 CentOS7.3 and libvirtd 2.0.0 segfault issue