Re: [libvirt] Entering freeze for libvirt-4.6.0

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 :)

> 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.