Thread 3 "CPU 0/KVM" received signal SIGABRT, Aborted.
[Switching to Thread 0x7fffed0be700 (LWP 8567)]
0x00007ffff2cc1860 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff2cc1860 in raise () at /usr/lib/libc.so.6
#1  0x00007ffff2cc2ec9 in abort () at /usr/lib/libc.so.6
#2  0x00005555557fbfe4 in kvm_io_ioeventfd_del (listener=<optimized out>, section=0x7fffed0bd630, match_data=<optimized out>, data=0, e=<optimized out>) at /home/hans/build/qemu/accel/kvm/kvm-all.c:852
#3  0x00005555557ec389 in address_space_add_del_ioeventfds (as=as@entry=0x5555563b1780 <address_space_io>, fds_new=fds_new@entry=0x7fffe805b870, fds_new_nb=fds_new_nb@entry=3, fds_old=0x7fffe807b860, fds_old_nb=6) at /home/hans/build/qemu/memory.c:832
#4  0x00005555557ec72f in address_space_update_ioeventfds (as=as@entry=0x5555563b1780 <address_space_io>) at /home/hans/build/qemu/memory.c:895
#5  0x00005555557ee489 in memory_region_transaction_commit () at /home/hans/build/qemu/memory.c:1097
#6  0x000055555583b417 in virtio_device_stop_ioeventfd_impl (vdev=0x555557873e00) at /home/hans/build/qemu/hw/virtio/virtio.c:2642
#7  0x0000555555a3799c in virtio_bus_stop_ioeventfd (bus=bus@entry=0x555557873d88) at hw/virtio/virtio-bus.c:246
#8  0x0000555555a34372 in virtio_pci_stop_ioeventfd (proxy=proxy@entry=0x55555786bc90) at hw/virtio/virtio-pci.c:294
#9  0x0000555555a3548b in virtio_pci_common_write (opaque=0x55555786bc90, addr=<optimized out>, val=0, size=<optimized out>) at hw/virtio/virtio-pci.c:1262
#10 0x00005555557eb116 in memory_region_write_accessor (mr=0x55555786c660, addr=20, value=<optimized out>, size=1, shift=<optimized out>, mask=<optimized out>, attrs=...) at /home/hans/build/qemu/memory.c:560
#11 0x00005555557e9aee in access_with_adjusted_size (addr=addr@entry=20, value=value@entry=0x7fffed0bd8d8, size=size@entry=1, access_size_min=<optimized out>, access_size_max=<optimized out>, access_fn=access_fn@entry=0x5555557eb09c <memory_region_write_accessor>, mr=0x55555786c660, attrs=...) at /home/hans/build/qemu/memory.c:627
#12 0x00005555557eccdc in memory_region_dispatch_write (mr=mr@entry=0x55555786c660, addr=addr@entry=20, data=<optimized out>, size=size@entry=1, attrs=attrs@entry=...) at /home/hans/build/qemu/memory.c:1503
#13 0x00005555557a51a2 in flatview_write_continue (fv=fv@entry=0x7fffe8750e20, addr=addr@entry=34661810196, attrs=..., attrs@entry=..., buf=buf@entry=0x7ffff7fef028 "", len=len@entry=1, addr1=<optimized out>, l=<optimized out>, mr=0x55555786c660) at /home/hans/build/qemu/exec.c:3044
#14 0x00005555557a5334 in flatview_write (fv=0x7fffe8750e20, addr=34661810196, attrs=..., buf=0x7ffff7fef028 "", len=1) at /home/hans/build/qemu/exec.c:3089
#15 0x00005555557a7d72 in flatview_rw (fv=<optimized out>, addr=addr@entry=34661810196, attrs=..., buf=buf@entry=0x7ffff7fef028 "", len=len@entry=1, is_write=is_write@entry=true) at /home/hans/build/qemu/exec.c:3198
#16 0x00005555557a7da6 in address_space_rw (as=<optimized out>, addr=34661810196, attrs=attrs@entry=..., buf=buf@entry=0x7ffff7fef028 "", len=1, is_write=<optimized out>) at /home/hans/build/qemu/exec.c:3208
#17 0x00005555557fcf65 in kvm_cpu_exec (cpu=cpu@entry=0x5555569633d0) at /home/hans/build/qemu/accel/kvm/kvm-all.c:1941
#18 0x00005555557d9b6b in qemu_kvm_cpu_thread_fn (arg=arg@entry=0x5555569633d0) at /home/hans/build/qemu/cpus.c:1196
#19 0x0000555555b5e32b in qemu_thread_start (args=0x555556985dc0) at util/qemu-thread-posix.c:504
#20 0x00007ffff304b08c in start_thread () at /usr/lib/libpthread.so.0
#21 0x00007ffff2d82e1f in clone () at /usr/lib/libc.so.6