Re: Entering freeze for libvirt-4.6.0

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On Mon, Jul 30, 2018 at 05:20:01PM +0200, Andrea Bolognani wrote:
> On Sat, 2018-07-28 at 21:56 +0800, Daniel Veillard wrote:
> >   As suggested yesterday, I have just tagged the release candidate 1 in git,
> > and pushed signed tarbal and rpms to the usual place:
> > 
> >    ftp://libvirt.org/libvirt/
> > 
> >   seems to work fine with my limited testing, and https://ci.centos.org/view/libvirt/
> > is all green (except for virt-viewer-master-rpm ?)
> 
> This was caused by virt-viewer recently bumping their minimum
> spice-gtk version to 0.35, which is not available on CentOS or
> Fedora older than 28. It's since been addressed, and all dots
> are back to green now :)

 Ok, cool thanks for the update !

> > so things looks pretty good for
> > me but please try it out on different systems and OSes.
> > 
> >   If everything goes well I will push rc2 on Tuesday targetting Thursday for the
> > final release (or Friday if I get stuck in travels).
> > 
> >   thanks in advance for trying it out !
> 
> Unfortunately I've spotted an issue during my testing of rc1 today:
> with the libvirt_guest NSS module enabled, Evolution would crash a
> few seconds after being started. Here's the stack trace:
> 
>   #0  0x00007fffe7b69ba5 in json_object_iter_next () at /lib64/libjson-glib-1.0.so.0
>   #1  0x00007fffad8e757b in virJSONValueFromJansson () at /lib64/libnss_libvirt_guest.so.2
>   #2  0x00007fffad8e75d8 in virJSONValueFromJansson () at /lib64/libnss_libvirt_guest.so.2
>   #3  0x00007fffad8e8994 in virJSONValueFromString () at /lib64/libnss_libvirt_guest.so.2
>   #4  0x00007fffad8ecb5a in virMacMapNew () at /lib64/libnss_libvirt_guest.so.2
>   #5  0x00007fffad8cc140 in findLease () at /lib64/libnss_libvirt_guest.so.2
>   #6  0x00007fffad8ccb1c in _nss_libvirt_guest_gethostbyname4_r () at /lib64/libnss_libvirt_guest.so.2
>   #7  0x00007fffeb2599d2 in gaih_inet.constprop () at /lib64/libc.so.6
>   #8  0x00007fffeb25aab4 in getaddrinfo () at /lib64/libc.so.6
>   #9  0x00007ffff1d41a04 in do_lookup_by_name () at /lib64/libgio-2.0.so.0
>   #10 0x00007ffff1d3e937 in g_task_thread_pool_thread () at /lib64/libgio-2.0.so.0
>   #11 0x00007ffff5c39933 in g_thread_pool_thread_proxy () at /lib64/libglib-2.0.so.0
>   #12 0x00007ffff5c38f2a in g_thread_proxy () at /lib64/libglib-2.0.so.0
>   #13 0x00007ffff6314594 in start_thread () at /lib64/libpthread.so.0
>   #14 0x00007fffeb2700df in clone () at /lib64/libc.so.6
> 
> I've talked about it with a few colleagues and we believe the issue
> to be caused by jansson and json-glib both exporting a symbol called
> json_object_iter_next: Evolution itself (indirectly?) links against
> the latter library, so when the libvirt_guest NSS module is loaded
> and attempts to process JSON using the former, it picks up the wrong
> implementation, leading to a crash. gnome-boxes also crashes with
> the same stack trace.
> 
> It seems like a similar issue could affect any application linking
> both to libvirt and json-glib, regardless of whether or not the NSS
> plugin has been enabled, which is of course pretty bad.
> 
> Unfortunately, I don't have any bright ideas on how to solve this,
> so anyone who might: please step forward! We're just a few days
> away from the next release, and if we can't figure out a way around
> this soon I'm afraid the only reasonable course of action would be
> to (temporarily) revert the switch from yajl to jansson.

  Ok,so far I'm not seeing any suggestion on this issue, is there
an entry in bugzilla about it ?

I will push RC2 today but we can wait to push final on Friday or this
week-end if no solution is found and we need to revert back to old lib

  thanks !

Daniel


-- 
Daniel Veillard      | Red Hat Developers Tools http://developer.redhat.com/
veillard@xxxxxxxxxx  | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | virtualization library  http://libvirt.org/

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