Public bug reported:
Relevant qemu.git master commit:
24a6e7f4d91e9ed5f8117ecb083431a23f8609a0
When trying to migrate a VM using the TCP protocol, a segfault happened:
21:45:07 INFO | Running qemu command (reformatted):
/home/lmr/Code/qemu/x86_64-softmmu/qemu-system-x86_64 \
-S \
-name 'virt-tests-vm1' \
-nodefaults \
-chardev
socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20130415-214507-8fDeX7Fj,server,nowait
\
-mon chardev=hmp_id_hmp1,mode=readline \
-chardev
socket,id=serial_id_serial1,path=/tmp/serial-serial1-20130415-214507-8fDeX7Fj,server,nowait
\
-device isa-serial,chardev=serial_id_serial1 \
-chardev
socket,id=seabioslog_id_20130415-214507-8fDeX7Fj,path=/tmp/seabios-20130415-214507-8fDeX7Fj,server,nowait
\
-device
isa-debugcon,chardev=seabioslog_id_20130415-214507-8fDeX7Fj,iobase=0x402 \
-device ich9-usb-uhci1,id=usb1 \
-drive
file='/home/lmr/Code/virt-test.git/shared/data/images/jeos-17-64.qcow2',if=none,id=virtio0
\
-device virtio-blk-pci,drive=virtio0,bootindex=1 \
-device
virtio-net-pci,netdev=idr5RNof,mac='9a:42:43:44:45:46',id='idJVlBu3' \
-netdev user,id=idr5RNof,hostfwd=tcp::5000-:22 \
-m 1024 \
-smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \
-cpu 'SandyBridge' \
-M pc \
-device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \
-vnc :1 \
-vga std \
-rtc base=utc,clock=host,driftfix=none \
-boot order=cdn,once=c,menu=off \
-enable-kvm \
-incoming tcp:0:5200
21:45:08 INFO | [qemu output] qemu-system-x86_64: -device
usb-tablet,id=usb-tablet1,bus=usb1.0,port=1: Bus 'virtio-pci-bus.0' is full
21:45:08 DEBUG| VM appears to be alive with PID 2002
21:45:08 DEBUG| (monitor hmp1) Sending command 'info cpus'
21:45:08 DEBUG| (monitor hmp1) Response to 'info cpus'
21:45:08 DEBUG| (monitor hmp1) * CPU #0: pc=0x00000000fffffff0 thread_id=2004
21:45:08 DEBUG| (monitor hmp1) CPU #1: pc=0x00000000fffffff0 thread_id=2005
21:45:09 DEBUG| (monitor hmp1) Sending command 'cont'
21:45:09 INFO | Migrating to tcp:0:5200
21:45:09 DEBUG| (monitor hmp1) Sending command 'migrate -d tcp:0:5200'
21:45:10 WARNI| Could not find (qemu) prompt after command 'screendump
/dev/shm/scrdump-MDE7wl.ppm'. Output so far: ''
21:45:10 WARNI| VM 'virt-tests-vm1' produced an invalid screendump
21:45:10 INFO | [qemu output] qemu: warning: error while loading state section
id 3
21:45:10 INFO | [qemu output] load of migration failed
21:45:10 INFO | [qemu output] /bin/sh: line 1: 1867 Segmentation fault
/home/lmr/Code/qemu/x86_64-softmmu/qemu-system-x86_64 -S -name 'virt-tests-vm1'
-nodefaults -chardev
socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20130415-214454-pGmRwNvs,server,nowait
-mon chardev=hmp_id_hmp1,mode=readline -chardev
socket,id=serial_id_serial1,path=/tmp/serial-serial1-20130415-214454-pGmRwNvs,server,nowait
-device isa-serial,chardev=serial_id_serial1 -chardev
socket,id=seabioslog_id_20130415-214454-pGmRwNvs,path=/tmp/seabios-20130415-214454-pGmRwNvs,server,nowait
-device
isa-debugcon,chardev=seabioslog_id_20130415-214454-pGmRwNvs,iobase=0x402
-device ich9-usb-uhci1,id=usb1 -drive
file='/home/lmr/Code/virt-test.git/shared/data/images/jeos-17-64.qcow2',if=none,id=virtio0
-device virtio-blk-pci,drive=virtio0,bootindex=1 -device
virtio-net-pci,netdev=id33wvth,mac='9a:42:43:44:45:46',id='idavPVhj' -netdev
user,id=id33wvth,hostfwd=tcp::5001-:22 -m 1024 -smp
2,maxcpus=2,cores=1,threads=1,so:
We've missed those problems during the last couple of weeks due to
problems in our test grid. The problem can be seen running the default
test set on virt-test. By default, virt-test does not use
MALLOC_PERTURB_=1. When using MALLOC_PERTURB_=1, pretty much all
migration modes will fail.
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1169375
Title:
qemu.git master -> qemu segfaults during tcp migration (and other
modes when using MALLOC_PERTURB_=1)
Status in QEMU:
New
Bug description:
Relevant qemu.git master commit:
24a6e7f4d91e9ed5f8117ecb083431a23f8609a0
When trying to migrate a VM using the TCP protocol, a segfault
happened:
21:45:07 INFO | Running qemu command (reformatted):
/home/lmr/Code/qemu/x86_64-softmmu/qemu-system-x86_64 \
-S \
-name 'virt-tests-vm1' \
-nodefaults \
-chardev
socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20130415-214507-8fDeX7Fj,server,nowait
\
-mon chardev=hmp_id_hmp1,mode=readline \
-chardev
socket,id=serial_id_serial1,path=/tmp/serial-serial1-20130415-214507-8fDeX7Fj,server,nowait
\
-device isa-serial,chardev=serial_id_serial1 \
-chardev
socket,id=seabioslog_id_20130415-214507-8fDeX7Fj,path=/tmp/seabios-20130415-214507-8fDeX7Fj,server,nowait
\
-device
isa-debugcon,chardev=seabioslog_id_20130415-214507-8fDeX7Fj,iobase=0x402 \
-device ich9-usb-uhci1,id=usb1 \
-drive
file='/home/lmr/Code/virt-test.git/shared/data/images/jeos-17-64.qcow2',if=none,id=virtio0
\
-device virtio-blk-pci,drive=virtio0,bootindex=1 \
-device
virtio-net-pci,netdev=idr5RNof,mac='9a:42:43:44:45:46',id='idJVlBu3' \
-netdev user,id=idr5RNof,hostfwd=tcp::5000-:22 \
-m 1024 \
-smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \
-cpu 'SandyBridge' \
-M pc \
-device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \
-vnc :1 \
-vga std \
-rtc base=utc,clock=host,driftfix=none \
-boot order=cdn,once=c,menu=off \
-enable-kvm \
-incoming tcp:0:5200
21:45:08 INFO | [qemu output] qemu-system-x86_64: -device
usb-tablet,id=usb-tablet1,bus=usb1.0,port=1: Bus 'virtio-pci-bus.0' is full
21:45:08 DEBUG| VM appears to be alive with PID 2002
21:45:08 DEBUG| (monitor hmp1) Sending command 'info cpus'
21:45:08 DEBUG| (monitor hmp1) Response to 'info cpus'
21:45:08 DEBUG| (monitor hmp1) * CPU #0: pc=0x00000000fffffff0
thread_id=2004
21:45:08 DEBUG| (monitor hmp1) CPU #1: pc=0x00000000fffffff0
thread_id=2005
21:45:09 DEBUG| (monitor hmp1) Sending command 'cont'
21:45:09 INFO | Migrating to tcp:0:5200
21:45:09 DEBUG| (monitor hmp1) Sending command 'migrate -d tcp:0:5200'
21:45:10 WARNI| Could not find (qemu) prompt after command 'screendump
/dev/shm/scrdump-MDE7wl.ppm'. Output so far: ''
21:45:10 WARNI| VM 'virt-tests-vm1' produced an invalid screendump
21:45:10 INFO | [qemu output] qemu: warning: error while loading state
section id 3
21:45:10 INFO | [qemu output] load of migration failed
21:45:10 INFO | [qemu output] /bin/sh: line 1: 1867 Segmentation fault
/home/lmr/Code/qemu/x86_64-softmmu/qemu-system-x86_64 -S -name 'virt-tests-vm1'
-nodefaults -chardev
socket,id=hmp_id_hmp1,path=/tmp/monitor-hmp1-20130415-214454-pGmRwNvs,server,nowait
-mon chardev=hmp_id_hmp1,mode=readline -chardev
socket,id=serial_id_serial1,path=/tmp/serial-serial1-20130415-214454-pGmRwNvs,server,nowait
-device isa-serial,chardev=serial_id_serial1 -chardev
socket,id=seabioslog_id_20130415-214454-pGmRwNvs,path=/tmp/seabios-20130415-214454-pGmRwNvs,server,nowait
-device
isa-debugcon,chardev=seabioslog_id_20130415-214454-pGmRwNvs,iobase=0x402
-device ich9-usb-uhci1,id=usb1 -drive
file='/home/lmr/Code/virt-test.git/shared/data/images/jeos-17-64.qcow2',if=none,id=virtio0
-device virtio-blk-pci,drive=virtio0,bootindex=1 -device
virtio-net-pci,netdev=id33wvth,mac='9a:42:43:44:45:46',id='idavPVhj' -netdev
user,id=id33wvth,hostfwd=tcp::5001-:22 -m 1024 -smp
2,maxcpus=2,cores=1,threads=1,so:
We've missed those problems during the last couple of weeks due to
problems in our test grid. The problem can be seen running the default
test set on virt-test. By default, virt-test does not use
MALLOC_PERTURB_=1. When using MALLOC_PERTURB_=1, pretty much all
migration modes will fail.
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