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Re: [Qemu-devel] A crash problem about "loadvm"
From: |
Liuji (Jeremy) |
Subject: |
Re: [Qemu-devel] A crash problem about "loadvm" |
Date: |
Mon, 1 Apr 2013 07:56:33 +0000 |
I delete the "dev->sin = NULL;" in the last of "spice_char_device_reset"
function. And the "loadvm" is OK.
But I don't know whether this change will lead to other problems. Who can give
me some advice?
Best Regards,
Jeremy Liu
> Hello, everyone
>
> I found a problem about "loadvm", when I use Spice.
>
> Host OS: Fedora 17
> Qemu: 1.4.0
> Spice: 0.12.2
> Quest OS: WinXP
>
> 1) Use the following command to start the VM:
> qemu-kvm -enable-kvm -name winxp -M pc-0.15 -m 1024 -smp 2 -boot c
> -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
> -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive
> file=/home/test/winxp.qcow2,if=virtio,index=0,format=qcow2
> -net nic,model=virtio,macaddr=52:54:00:05:11:12 -monitor stdio -chardev
> spicevmc,id=charchannel0,name=vdagent
> -device
> virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
> -chardev pty,id=charchannel1
> -device
> virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=arbitrary.virtio.serial.port.name
> -device usb-tablet,id=input0
> -spice
> port=3001,addr=186.100.8.131,disable-ticketing,plaintext-channel=main,plaintext-channel=playback,plaintext-channel=record,image-compression=auto_glz
>
> -vga qxl -global qxl-vga.vram_size=67108864 -device
> AC97,id=sound0,bus=pci.0,addr=0x4
> 2) Use spice client to connect the VM.
> 3) Exec the "savevm" command in the qemu monitor.
> 4) List snapshot information:
> info snapshots
> ID TAG VM SIZE DATE VM CLOCK
> 1 vm-20130330181626 224M 2013-03-30 18:16:26 00:00:17.294
>
> 5) Load the snapshot. But the process crashed:
> loadvm vm-20130330181626
> red_dispatcher_loadvm_commands:
> Segmentation fault (core dumped)
>
> I use the GDB to analyze the core-dump file:
> #0 0x00007f6cbdc37a15 in spice_char_device_write_to_device
> (dev=0x7f6cc5248320) at char_device.c:439
> 439 sif = SPICE_CONTAINEROF(dev->sin->base.sif,
> SpiceCharDeviceInterface, base);
> (gdb) p dev
> $1 = (SpiceCharDeviceState *) 0x7f6cc5248320
> (gdb) p dev->sin
> $2 = (SpiceCharDeviceInstance *) 0x0
>
> I have always found this problem after the
> commit(fc24f3bd2ed4c97c99ad40e747732ae46dff2009 "spice: notify spice server
> on vm start/stop").
>
> Could you give me some advices to debug this problem?
>
>
> ------------------
> Best Regards,
>
> Jeremy Liu
- Re: [Qemu-devel] A crash problem about "loadvm",
Liuji (Jeremy) <=