Hi folks,
qemu-kvm is segfaulting when executing migration with blkdebug files.
19:50:02 DEBUG| Git repo qemu_kvm uri: git://github.com/avikivity/qemu.git
19:50:02 DEBUG| Git repo qemu_kvm branch: master
19:50:30 INFO | Commit hash for qemu_kvm is
7879db7e9c09b92d9af1c143fbe2cc212ec89e4b (no tag found)
How to reproduce:
1) create a origin vm like:
/usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std
-monitor
unix:'/tmp/monitor-humanmonitor1-20111104-200902-95j0',server,nowait
-qmp unix:'/tmp/monitor-qmpmonitor1-20111104-200902-95j0',server,nowait
-serial unix:'/tmp/serial-20111104-200902-95j0',server,nowait -drive
file=blkdebug:/usr/local/autotest/virt/blkdebug/default.conf:/tmp/kvm_autotest_root/images/rhel6.1-64.qcow2,index=0,if=virtio,cache=none,rerror=stop,werror=stop
-device
virtio-net-pci,netdev=idtzhBVb,mac='9a:d0:7b:07:18:72',id='id9JW3ZV'
-netdev tap,id=idtzhBVb,fd=23 -m 2048 -smp 2 -vnc :0
2) create a destination vm like:
/usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std
-monitor
unix:'/tmp/monitor-humanmonitor1-20111104-201329-Ia9o',server,nowait
-qmp unix:'/tmp/monitor-qmpmonitor1-20111104-201329-Ia9o',server,nowait
-serial unix:'/tmp/serial-20111104-201329-Ia9o',server,nowait -drive
file=blkdebug:/usr/local/autotest/virt/blkdebug/default.conf:/tmp/kvm_autotest_root/images/rhel6.1-64.qcow2,index=0,if=virtio,cache=none,rerror=stop,werror=stop
-device
virtio-net-pci,netdev=idup1xAf,mac='9a:d0:7b:07:18:72',id='idyvOQf3'
-netdev tap,id=idup1xAf,fd=19 -m 2048 -smp 2 -vnc :1 -S -incoming
"exec:nc -l 5200"
Note that blkdebug file contains:
[inject-error]
state = "2"
event = "read_aio"
errno = "7"
immediately = "off"
once = "on"
[set-state]
state = "1"
event = "read_aio"
new_state = "2"
[set-state]
state = "2"
event = "read_aio"
new_state = "3"
Start the migration (on this example, using exec, but it reproduces with
tcp and unix sockets):
11/04 20:13:30 DEBUG|kvm_monito:0254| (monitor humanmonitor1) Sending
command 'migrate -d "exec:nc localhost 5200"'
Then you will have:
11/04 20:13:33 INFO | aexpect:0783| [qemu output] invalid runstate
transition
11/04 20:13:36 INFO | aexpect:0783| [qemu output] /bin/sh: line 1:
14695 Aborted (core dumped)
/usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std
-monitor
unix:'/tmp/monitor-humanmonitor1-20111104-200902-95j0',server,nowait
-qmp unix:'/tmp/monitor-qmpmonitor1-20111104-200902-95j0',server,nowait
-serial unix:'/tmp/serial-20111104-200902-95j0',server,nowait -drive
file=blkdebug:/usr/local/autotest/virt/blkdebug/default.conf:/tmp/kvm_autotest_root/images/rhel6.1-64.qcow2,index=0,if=virtio,cache=none,rerror=stop,werror=stop
-device
virtio-net-pci,netdev=idtzhBVb,mac='9a:d0:7b:07:18:72',id='id9JW3ZV'
-netdev tap,id=idtzhBVb,fd=23 -m 2048 -smp 2 -vnc :0
We do have the core dumps available in case someone is interested in
debugging the issue.
It is important to note that this problem is not happening with qemu.git
master.
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