QEMU

qemu-2.0 occasionally segfaults with Windows 2012R2

Bug #1333651 reported by dev-zero on 2014-06-24

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	QEMU	Fix Released	Undecided	Unassigned

Bug Description

This is with qemu-2.0 (KVM), linux kernel 3.10.35, using qcow2 images directly accessed via libgfapi (glusterfs-3.4.2).
Such a segfaults happens roughly once every 2 weeks and only for VMs with high network and/or disk activity.

Guest OS with which we could reproduce this was always Windows Server 2012R2 using virtio-win-0.1-75.

vhost-net is active, the disks are attached as virtio-blk devices (see also XML definition from libvirt further below)

Following are the backtraces for all threads:

(gdb) threads
Undefined command: "threads". Try "help".
(gdb) info threads
  Id Target Id Frame
  32 Thread 0x7f5c1affd700 (LWP 16783) 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
  31 Thread 0x7f5bfe2fc700 (LWP 19906) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  30 Thread 0x7f5c45f87880 (LWP 16769) 0x00007f5c42637ff6 in __GI_ppoll (fds=0x7f5c48bcd750, nfds=74,
    timeout=0x7fff92d94e60, timeout@entry=0x7fff92d94f20, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:57
  29 Thread 0x7f5c1bfff700 (LWP 16781) 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
  28 Thread 0x7f5c28de1700 (LWP 16780) 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
  27 Thread 0x7f5c1a7fc700 (LWP 16784) __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
  26 Thread 0x7f5c295e2700 (LWP 16779) __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
  25 Thread 0x7f57b2ffd700 (LWP 18170) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  24 Thread 0x7f57c97fa700 (LWP 31326) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  23 Thread 0x7f57b3fff700 (LWP 5016) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  22 Thread 0x7f57c9ffb700 (LWP 25116) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  21 Thread 0x7f5c31f7c700 (LWP 16776) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  20 Thread 0x7f5c1b7fe700 (LWP 16782) __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
  19 Thread 0x7f57ca7fc700 (LWP 24029) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  18 Thread 0x7f57cbfff700 (LWP 19985) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  17 Thread 0x7f57c8ff9700 (LWP 31327) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  16 Thread 0x7f5bfcefa700 (LWP 19924) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  15 Thread 0x7f5c30ee7700 (LWP 16777) 0x00007f5c426421b3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81
  14 Thread 0x7f5c3dc17700 (LWP 16772) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  13 Thread 0x7f5bfd6fb700 (LWP 19907) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  12 Thread 0x7f5c18bff700 (LWP 16788) 0x00007f5c42637ded in poll () at ../sysdeps/unix/syscall-template.S:81
  11 Thread 0x7f5c19ffb700 (LWP 16785) 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
  10 Thread 0x7f57caffd700 (LWP 20235) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  9 Thread 0x7f5c2bfff700 (LWP 16778) 0x00007f5c4290e43d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
  8 Thread 0x7f5bfecfd700 (LWP 17854) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  7 Thread 0x7f5c3e418700 (LWP 16771) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  6 Thread 0x7f57b37fe700 (LWP 18169) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  5 Thread 0x7f5c3bb57700 (LWP 16774) 0x00007f5c4290e43d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
  4 Thread 0x7f5c3c97f700 (LWP 16773) 0x00007f5c426421b3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81
  3 Thread 0x7f5c3277d700 (LWP 16775) pthread_cond_timedwait ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
  2 Thread 0x7f5c197fa700 (LWP 16786) 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
* 1 Thread 0x7f57cb7fe700 (LWP 19986) event_notifier_set (e=0x124)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/util/event_notifier-posix.c:97
(gdb) bt
#0 event_notifier_set (e=0x124) at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/util/event_notifier-posix.c:97
#1 0x00007f5c457145d1 in ?? () from /usr/lib64/libgfapi.so.0
#2 0x00007f5c454d1d0a in synctask_wrap () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c4259d760 in ?? () from /lib64/libc.so.6
#4 0x0000000000000000 in ?? ()
(gdb) thread 2
[Switching to thread 2 (Thread 0x7f5c197fa700 (LWP 16786))]
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c4627b5e9 in kvm_vcpu_ioctl (cpu=cpu@entry=0x7f5c48b8ccd0, type=type@entry=44672)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1790
#2 0x00007f5c4627b725 in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b8ccd0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1675
#3 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b8ccd0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#4 0x00007f5c42906fda in start_thread (arg=0x7f5c197fa700) at pthread_create.c:308
#5 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 3
[Switching to thread 3 (Thread 0x7f5c3277d700 (LWP 16775))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5c3277d700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 4
[Switching to thread 4 (Thread 0x7f5c3c97f700 (LWP 16773))]
#0 0x00007f5c426421b3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c426421b3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c454ea917 in ?? () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c45712584 in ?? () from /usr/lib64/libgfapi.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5c3c97f700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 5
[Switching to thread 5 (Thread 0x7f5c3bb57700 (LWP 16774))]
#0 0x00007f5c4290e43d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c4290e43d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c454b4874 in gf_timer_proc () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c42906fda in start_thread (arg=0x7f5c3bb57700) at pthread_create.c:308
#3 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 6
[Switching to thread 6 (Thread 0x7f57b37fe700 (LWP 18169))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57b37fe700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 7
[Switching to thread 7 (Thread 0x7f5c3e418700 (LWP 16771))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5c3e418700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 8
[Switching to thread 8 (Thread 0x7f5bfecfd700 (LWP 17854))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5bfecfd700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 9
[Switching to thread 9 (Thread 0x7f5c2bfff700 (LWP 16778))]
#0 0x00007f5c4290e43d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c4290e43d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c454b4874 in gf_timer_proc () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c42906fda in start_thread (arg=0x7f5c2bfff700) at pthread_create.c:308
#3 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 10
[Switching to thread 10 (Thread 0x7f57caffd700 (LWP 20235))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57caffd700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 11
[Switching to thread 11 (Thread 0x7f5c19ffb700 (LWP 16785))]
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c4627b5e9 in kvm_vcpu_ioctl (cpu=cpu@entry=0x7f5c48b7c720, type=type@entry=44672)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1790
#2 0x00007f5c4627b725 in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b7c720)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1675
#3 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b7c720)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#4 0x00007f5c42906fda in start_thread (arg=0x7f5c19ffb700) at pthread_create.c:308
#5 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 12
[Switching to thread 12 (Thread 0x7f5c18bff700 (LWP 16788))]
#0 0x00007f5c42637ded in poll () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c42637ded in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c43521494 in ?? () from /usr/lib64/libspice-server.so.1
#2 0x00007f5c42906fda in start_thread (arg=0x7f5c18bff700) at pthread_create.c:308
#3 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 13
[Switching to thread 13 (Thread 0x7f5bfd6fb700 (LWP 19907))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5bfd6fb700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 14
[Switching to thread 14 (Thread 0x7f5c3dc17700 (LWP 16772))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5c3dc17700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 15
[Switching to thread 15 (Thread 0x7f5c30ee7700 (LWP 16777))]
#0 0x00007f5c426421b3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c426421b3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c454ea917 in ?? () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c45712584 in ?? () from /usr/lib64/libgfapi.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5c30ee7700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 16
[Switching to thread 16 (Thread 0x7f5bfcefa700 (LWP 19924))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5bfcefa700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 17
[Switching to thread 17 (Thread 0x7f57c8ff9700 (LWP 31327))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57c8ff9700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 18
[Switching to thread 18 (Thread 0x7f57cbfff700 (LWP 19985))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57cbfff700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 19
[Switching to thread 19 (Thread 0x7f57ca7fc700 (LWP 24029))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57ca7fc700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 20
[Switching to thread 20 (Thread 0x7f5c1b7fe700 (LWP 16782))]
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
135 ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such file or directory.
(gdb) bt
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007f5c4290923c in _L_lock_1001 () from /lib64/libpthread.so.0
#2 0x00007f5c4290908b in __GI___pthread_mutex_lock (mutex=0x7f5c46b87dc0 <qemu_global_mutex>) at pthread_mutex_lock.c:64
#3 0x00007f5c4631c6c9 in qemu_mutex_lock (mutex=mutex@entry=0x7f5c46b87dc0 <qemu_global_mutex>)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/util/qemu-thread-posix.c:76
#4 0x00007f5c46221c50 in qemu_mutex_lock_iothread ()
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:1043
#5 0x00007f5c4627b72d in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b4b610)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1677
#6 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b4b610)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#7 0x00007f5c42906fda in start_thread (arg=0x7f5c1b7fe700) at pthread_create.c:308
#8 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 21
[Switching to thread 21 (Thread 0x7f5c31f7c700 (LWP 16776))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5c31f7c700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 22
[Switching to thread 22 (Thread 0x7f57c9ffb700 (LWP 25116))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57c9ffb700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 23
[Switching to thread 23 (Thread 0x7f57b3fff700 (LWP 5016))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57b3fff700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 24
[Switching to thread 24 (Thread 0x7f57c97fa700 (LWP 31326))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57c97fa700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 25
[Switching to thread 25 (Thread 0x7f57b2ffd700 (LWP 18170))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 in ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f57b2ffd700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 26
[Switching to thread 26 (Thread 0x7f5c295e2700 (LWP 16779))]
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
135 ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such file or directory.
(gdb) bt
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007f5c4290923c in _L_lock_1001 () from /lib64/libpthread.so.0
#2 0x00007f5c4290908b in __GI___pthread_mutex_lock (mutex=0x7f5c46b87dc0 <qemu_global_mutex>) at pthread_mutex_lock.c:64
#3 0x00007f5c4631c6c9 in qemu_mutex_lock (mutex=mutex@entry=0x7f5c46b87dc0 <qemu_global_mutex>)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/util/qemu-thread-posix.c:76
#4 0x00007f5c46221c50 in qemu_mutex_lock_iothread ()
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:1043
#5 0x00007f5c4627b72d in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48aefab0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1677
#6 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48aefab0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#7 0x00007f5c42906fda in start_thread (arg=0x7f5c295e2700) at pthread_create.c:308
#8 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 27
[Switching to thread 27 (Thread 0x7f5c1a7fc700 (LWP 16784))]
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
135 in ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
(gdb) bt
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007f5c4290923c in _L_lock_1001 () from /lib64/libpthread.so.0
#2 0x00007f5c4290908b in __GI___pthread_mutex_lock (mutex=0x7f5c46b87dc0 <qemu_global_mutex>) at pthread_mutex_lock.c:64
#3 0x00007f5c4631c6c9 in qemu_mutex_lock (mutex=mutex@entry=0x7f5c46b87dc0 <qemu_global_mutex>)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/util/qemu-thread-posix.c:76
#4 0x00007f5c46221c50 in qemu_mutex_lock_iothread ()
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:1043
#5 0x00007f5c4627b72d in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b6c170)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1677
#6 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b6c170)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#7 0x00007f5c42906fda in start_thread (arg=0x7f5c1a7fc700) at pthread_create.c:308
#8 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 28
[Switching to thread 28 (Thread 0x7f5c28de1700 (LWP 16780))]
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c4627b5e9 in kvm_vcpu_ioctl (cpu=cpu@entry=0x7f5c48b2aab0, type=type@entry=44672)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1790
#2 0x00007f5c4627b725 in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b2aab0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1675
#3 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b2aab0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#4 0x00007f5c42906fda in start_thread (arg=0x7f5c28de1700) at pthread_create.c:308
#5 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 29
[Switching to thread 29 (Thread 0x7f5c1bfff700 (LWP 16781))]
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
81 in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c4627b5e9 in kvm_vcpu_ioctl (cpu=cpu@entry=0x7f5c48b3b060, type=type@entry=44672)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1790
#2 0x00007f5c4627b725 in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b3b060)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1675
#3 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b3b060)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#4 0x00007f5c42906fda in start_thread (arg=0x7f5c1bfff700) at pthread_create.c:308
#5 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 30
[Switching to thread 30 (Thread 0x7f5c45f87880 (LWP 16769))]
#0 0x00007f5c42637ff6 in __GI_ppoll (fds=0x7f5c48bcd750, nfds=74, timeout=0x7fff92d94e60, timeout@entry=0x7fff92d94f20,
    sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:57
57 ../sysdeps/unix/sysv/linux/ppoll.c: No such file or directory.
(gdb) bt
#0 0x00007f5c42637ff6 in __GI_ppoll (fds=0x7f5c48bcd750, nfds=74, timeout=0x7fff92d94e60, timeout@entry=0x7fff92d94f20,
    sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:57
#1 0x00007f5c461d5c39 in ppoll (__ss=0x0, __timeout=0x7fff92d94f20, __nfds=<optimized out>, __fds=<optimized out>)
    at /usr/include/bits/poll2.h:77
#2 qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>, timeout=timeout@entry=313102)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/qemu-timer.c:316
#3 0x00007f5c46199154 in os_host_main_loop_wait (timeout=313102)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/main-loop.c:229
#4 main_loop_wait (nonblocking=<optimized out>) at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/main-loop.c:484
#5 0x00007f5c460457ae in main_loop () at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/vl.c:2051
#6 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/vl.c:4507
(gdb) thread 31
[Switching to thread 31 (Thread 0x7f5bfe2fc700 (LWP 19906))]
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
238 ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: No such file or directory.
(gdb) bt
#0 pthread_cond_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007f5c454d34e3 in syncenv_task () from /usr/lib64/libglusterfs.so.0
#2 0x00007f5c454d3920 in syncenv_processor () from /usr/lib64/libglusterfs.so.0
#3 0x00007f5c42906fda in start_thread (arg=0x7f5bfe2fc700) at pthread_create.c:308
#4 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
(gdb) thread 32
[Switching to thread 32 (Thread 0x7f5c1affd700 (LWP 16783))]
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
81 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) bt
#0 0x00007f5c42639607 in ioctl () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f5c4627b5e9 in kvm_vcpu_ioctl (cpu=cpu@entry=0x7f5c48b5bbc0, type=type@entry=44672)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1790
#2 0x00007f5c4627b725 in kvm_cpu_exec (cpu=cpu@entry=0x7f5c48b5bbc0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/kvm-all.c:1675
#3 0x00007f5c4622095c in qemu_kvm_cpu_thread_fn (arg=0x7f5c48b5bbc0)
    at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/cpus.c:873
#4 0x00007f5c42906fda in start_thread (arg=0x7f5c1affd700) at pthread_create.c:308
#5 0x00007f5c42641b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

XML definition from libvirt:

<domain type='kvm' id='9'>
  <name>b1032388-abb8-4176-897b-0c30a1a73714</name>
  <uuid>b1032388-abb8-4176-897b-0c30a1a73714</uuid>
  <memory unit='KiB'>16777216</memory>
  <currentMemory unit='KiB'>16777216</currentMemory>
  <vcpu placement='static'>8</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-i440fx-1.5'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <pae/>
    <hap/>
  </features>
  <cpu mode='host-model'>
    <model fallback='allow'/>
  </cpu>
  <clock offset='localtime'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/virtualization/iso/571196f0-4b29-48c9-b250-50697cbe4317.iso'/>
      <backingStore/>
      <target dev='hdb' bus='ide'/>
      <readonly/>
      <alias name='ide0-0-1'/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <source file='/var/virtualization/iso/85d7e9f5-4288-4a3f-b209-c12ff11c61f3.iso'/>
      <backingStore/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <alias name='ide0-1-0'/>
      <address type='drive' controller='0' bus='1' target='0' unit='0'/>
    </disk>
    <disk type='network' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source protocol='gluster' name='virtualization/vm-persistent/0f83f084-8080-413e-b558-b678e504836e/d35a6600-91bf-4fd1-aba4-1fe6a813d481.qcow2'>
        <host name='1.2.3.4'/>
      </source>
      <backingStore/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <disk type='network' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source protocol='gluster' name='virtualization/vm-persistent/0f83f084-8080-413e-b558-b678e504836e/V5qtOlCs-8PgV-64tQ-a79N-j4ko4GIBijT4.qcow2'>
        <host name='1.2.3.4'/>
      </source>
      <backingStore/>
      <target dev='vdb' bus='virtio'/>
      <alias name='virtio-disk1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb0'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb0'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb0'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <controller type='ide' index='0'>
      <alias name='ide0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <interface type='bridge'>
      <mac address='XX.XX.XX.XX:XX:XX'/>
      <source bridge='vmbr0'/>
      <target dev='kvm-XYZ_0'/>
      <model type='virtio'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/b1032388-abb8-4176-897b-0c30a1a73714.org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0'/>
      <alias name='channel1'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
    </input>
    <input type='mouse' bus='ps2'/>
    <input type='keyboard' bus='ps2'/>
    <graphics type='spice' port='5900' autoport='no' listen='1.2.3.4'>
      <listen type='address' address='1.2.3.4'/>
    </graphics>
    <sound model='ac97'>
      <alias name='sound0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </sound>
    <video>
      <model type='qxl' ram='65536' vram='65536' heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir0'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir1'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir2'/>
    </redirdev>
    <redirfilter>
      <usbdev allow='no'/>
    </redirfilter>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
    </memballoon>
    <rng model='virtio'>
      <rate bytes='1024' period='1000'/>
      <backend model='random'>/dev/random</backend>
      <alias name='rng0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/>
    </rng>
  </devices>
  <seclabel type='none'/>
</domain>

Revision history for this message

Stefan Hajnoczi (stefanha) wrote on 2014-07-07: Re: [Qemu-devel] [Bug 1333651] [NEW] qemu-2.0 occasionally segfaults with Windows 2012R2

On Tue, Jun 24, 2014 at 11:17:51AM -0000, dev-zero wrote:
> (gdb) bt
> #0 event_notifier_set (e=0x124) at /var/tmp/portage/app-emulation/qemu-2.0.0/work/qemu-2.0.0/util/event_notifier-posix.c:97
> #1 0x00007f5c457145d1 in ?? () from /usr/lib64/libgfapi.so.0
> #2 0x00007f5c454d1d0a in synctask_wrap () from /usr/lib64/libglusterfs.so.0
> #3 0x00007f5c4259d760 in ?? () from /lib64/libc.so.6
> #4 0x0000000000000000 in ?? ()

e=0x124 is an invalid address. This crash is probably fixed by:

  commit 924fe1293c3e7a3c787bbdfb351e7f168caee3e9
  Author: Stefan Hajnoczi <email address hidden>
  Date: Tue Jun 3 11:21:01 2014 +0200

aio: fix qemu_bh_schedule() bh->ctx race condition

Please apply the patch or try QEMU 2.1-rc0:
http://wiki.qemu.org/download/qemu-2.1.0-rc0.tar.bz2

Stefan

Revision history for this message

Thomas Huth (th-huth) wrote on 2017-07-19:

Assuming this has been fixed by the patch that Stefan pointed out in comment #1, so closing this ticket now (feel free to re-open if you still can reproduce it with the latest version of QEMU)

Changed in qemu:
status:	New → Fix Released

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