[Qemu-devel] qemu.git v1.0-1852-gf05f6b4 regression - Bus error, followed by core dump

[Lucas Meneghel Rodrigues <lmr@redhat.com>]

Hi,

We've noticed the following error during Windows install when using the
latest qemu from HEAD:

04/03 01:45:42 INFO |   aexpect:0786| [qemu output] /bin/sh: line 1: 21674 Bus error               (core dumped) MALLOC_PERTURB_=1 /usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std -monitor unix:'/tmp/monitor-humanmonitor1-20120403-014341-3gsf',server,nowait -qmp unix:'/tmp/monitor-qmpmonitor1-20120403-014341-3gsf',server,nowait -serial unix:'/tmp/serial-20120403-014341-3gsf',server,nowait -device ich9-usb-uhci1,id=usb1 -drive file='/tmp/kvm_autotest_root/images/win7-64-sp1.qcow2',index=0,if=virtio,cache=none -device virtio-net-pci,netdev=idoz6GVm,mac='9a:8e:fc:08:52:29',id='idodEJ4d' -netdev tap,id=idoz6GVm,fd=23 -m 2048 -smp 2 -drive file='/tmp/kvm_autotest_root/isos/windows/en_windows_7_ultimate_with_sp1_x64_dvd_u_677332.iso',media=cdrom,index=1 -drive file='/tmp/kvm_autotest_root/isos/windows/winutils.iso',media=cdrom,index=2 -drive file='/tmp/kvm_autotest_root/isos/virtio-win.iso',media=cdrom,index=3 -fda '/tmp/kvm_autotest_root/images/win7-64-sp1/answer.vfd' -device usb-tablet,id=usb-tablet1,bus=usb1.0 -vnc :0 -boot d -enable-kvm
04/03 01:45:42 INFO |   aexpect:0786| [qemu output] (Process terminated with status 135)

The actual command line used is:

MALLOC_PERTURB_=1 /usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std -monitor unix:'/tmp/monitor-humanmonitor1-20120403-014341-3gsf',server,nowait -qmp unix:'/tmp/monitor-qmpmonitor1-20120403-014341-3gsf',server,nowait -serial unix:'/tmp/serial-20120403-014341-3gsf',server,nowait -device ich9-usb-uhci1,id=usb1 -drive file='/tmp/kvm_autotest_root/images/win7-64-sp1.qcow2',index=0,if=virtio,cache=none -device virtio-net-pci,netdev=idoz6GVm,mac='9a:8e:fc:08:52:29',id='idodEJ4d' -netdev tap,id=idoz6GVm,fd=23 -m 2048 -smp 2 -drive file='/tmp/kvm_autotest_root/isos/windows/en_windows_7_ultimate_with_sp1_x64_dvd_u_677332.iso',media=cdrom,index=1 -drive file='/tmp/kvm_autotest_root/isos/windows/winutils.iso',media=cdrom,index=2 -drive file='/tmp/kvm_autotest_root/isos/virtio-win.iso',media=cdrom,index=3 -fda '/tmp/kvm_autotest_root/images/win7-64-sp1/answer.vfd' -device usb-tablet,id=usb-tablet1,bus=usb1.0 -vnc :0  -boot d -enable-kvm

A similar error happened during RHEL 6.2 install

04/03 01:43:55 INFO |   aexpect:0786| [qemu output] /bin/sh: line 1: 21368 Bus error               (core dumped) MALLOC_PERTURB_=1 /usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std -monitor unix:'/tmp/monitor-humanmonitor1-20120403-014341-3gsf',server,nowait -qmp unix:'/tmp/monitor-qmpmonitor1-20120403-014341-3gsf',server,nowait -serial unix:'/tmp/serial-20120403-014341-3gsf',server,nowait -device ich9-usb-uhci1,id=usb1 -drive file='/tmp/kvm_autotest_root/images/rhel62-64.qcow2',index=0,if=virtio,cache=none -device virtio-net-pci,netdev=id9w6EMs,mac='9a:8e:fc:08:f7:80',id='idodEJ4d' -netdev tap,id=id9w6EMs,fd=23 -m 2048 -smp 2 -drive file='/tmp/kvm_autotest_root/isos/linux/RHEL-6.2-x86_64-DVD.iso',media=cdrom,index=2 -drive file='/tmp/kvm_autotest_root/images/rhel62-64/ks.iso',media=cdrom,index=1 -device usb-tablet,id=usb-tablet1,bus=usb1.0 -kernel '/tmp/kvm_autotest_root/images/rhel62-64/vmlinuz' -append 'ks=cdrom nicdelay=60 console=ttyS0,115200 console=tty0' -initrd '/tmp/kvm_autotest_root/images/rhel62-64/initrd.img' -vnc :0 -boot d -enable-kvm
04/03 01:43:55 INFO |   aexpect:0786| [qemu output] (Process terminated with status 135)

MALLOC_PERTURB_=1 /usr/local/autotest/tests/kvm/qemu -name 'vm1' -nodefaults -vga std -monitor unix:'/tmp/monitor-humanmonitor1-20120403-014341-3gsf',server,nowait -qmp unix:'/tmp/monitor-qmpmonitor1-20120403-014341-3gsf',server,nowait -serial unix:'/tmp/serial-20120403-014341-3gsf',server,nowait -device ich9-usb-uhci1,id=usb1 -drive file='/tmp/kvm_autotest_root/images/rhel62-64.qcow2',index=0,if=virtio,cache=none -device virtio-net-pci,netdev=id9w6EMs,mac='9a:8e:fc:08:f7:80',id='idodEJ4d' -netdev tap,id=id9w6EMs,fd=23 -m 2048 -smp 2 -drive file='/tmp/kvm_autotest_root/isos/linux/RHEL-6.2-x86_64-DVD.iso',media=cdrom,index=2 -drive file='/tmp/kvm_autotest_root/images/rhel62-64/ks.iso',media=cdrom,index=1 -device usb-tablet,id=usb-tablet1,bus=usb1.0 -kernel '/tmp/kvm_autotest_root/images/rhel62-64/vmlinuz' -append 'ks=cdrom nicdelay=60 console=ttyS0,115200 console=tty0' -initrd '/tmp/kvm_autotest_root/images/rhel62-64/initrd.img' -vnc :0  -boot d -enable-kvm

The relevant git commit used was:

04/03 01:41:37 DEBUG|base_utils:0077| Running '/usr/bin/git fetch -q -f -u -t git://git.qemu.org/qemu.git master:master'
04/03 01:41:41 INFO |       git:0153| git commit ID is "f05f6b4adb4db3affb0cdd17383b0a7e905e66e1" (tag v1.0-1852-gf05f6b4)

There's a 2.1 core dump file saved in our results server, if there's any interested in it by contributors outside Red Hat, I can ssh it to some box, as requested.

So, even though it might be some flag we're using that is obsolete/deprecated/whatever here, qemu shouldn't crash.

I'm available to provide more information on the qemu official IRC channel (lmr).