[Qemu-devel] [Bug 604872] Re: qemu-system-arm segfaults emulating versatile machine after running debootstrap --second-stage inside vm

[Ricardo Salveti]

If you're at Lucid or Maverick, you can also create the rootfs img by
running the attached rootstock script.

Please install all rootstock dependencies by installing the official version 
provided by the distro:
sudo apt-get install rootstock

Using the attached script:
sudo bash ./rootstock --fqdn beagleboard --login ubuntu --password temppwd 
--imagesize 512M --seed ubuntu-minimal --dist lucid --serial ttyS2 --components 
"main universe multiverse"

You'll get the rootfs img and the command that rootstock would call, that gives 
the seg fault, e.g:
qemu-system-arm -M versatilepb -cpu cortex-a8 -kernel 
/tmp/tmp.OxxUOBq4B0/qemu-vmlinuz -no-reboot -nographic -pidfile 
/tmp/tmp.OxxUOBq4B0/qemu.pid -drive 
file=/tmp/tmp.OxxUOBq4B0/qemu-armel-201007122016.img,aio=native,cache=none  -m 
256 -append 'console=ttyAMA0,115200n8 root=/dev/sda rw mem=256M 
devtmpfs.mount=0 init=/bin/installer quiet'


** Attachment added: "Modified rootstock"
   http://launchpadlibrarian.net/51835052/rootstock

-- 
qemu-system-arm segfaults emulating versatile machine after running debootstrap 
--second-stage inside vm
https://bugs.launchpad.net/bugs/604872
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Status in QEMU: New
Status in “qemu-kvm” package in Ubuntu: New

Bug description:
Binary package hint: qemu-kvm

As I'm now implementing the support for creating a rootstock rootfs without 
requiring root, I need to run the deboostrap' second stage inside a VM, to 
correctly install the packages into the rootfs.

qemu-system-arm fails right after debootstrap finish the second stage, giving a 
segmentation fault.

Command:
qemu-system-arm -M versatilepb -cpu cortex-a8 -kernel vmlinuz -no-reboot 
-nographic -drive file=qemu-armel-201007122016.img,aio=native,cache=none -m 256 
-append 'console=ttyAMA0,115200n8 root=/dev/sda rw mem=256M devtmpfs.mount=0 
init=/bin/installer'
Uncompressing 
Linux.................................................................................................................................................................................................
 done, booting the kernel.
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32-21-versatile (address@hidden) (gcc version 
4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #32-Ubuntu Fri Apr 16 08:14:53 UTC 2010 (Ubuntu 
2.6.32-21.32-versatile 2.6.32.11+drm33.2)
...
I: Base system installed successfully.
I: Starting basic services in VM
Segmentation fault (core dumped)

[492816.197352] qemu-system-arm[16024]: segfault at ffffffffcf6ba8fc ip 
ffffffffcf6ba8fc sp 00007fffd0e68680 error 14

Image:
 * rootfs: http://rsalveti.net/pub/ubuntu/rootstock/qemu-armel-201007122016.img 
(md5 1d063ac8a65c798bb004cd1c4c7970c5)
 * kernel: 
http://ports.ubuntu.com/ubuntu-ports/dists/lucid/main/installer-armel/current/images/versatile/netboot/vmlinuz

I'm able to reproduce the bug on Maverick (amd64) and Lucid (x86).

Maverick qemu-kvm-extras: 0.12.4+noroms-0ubuntu4
Lucid qemu-kvm-extras: 0.12.3+noroms-0ubuntu9.2

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: qemu-kvm-extras 0.12.4+noroms-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.35-6.9-generic 2.6.35-rc3
Uname: Linux 2.6.35-6-generic x86_64
Architecture: amd64
Date: Mon Jul 12 18:55:35 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
KvmCmdLine: Error: command ['ps', '-C', 'kvm', '-F'] failed with exit code 1: 
UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
MachineType: LENOVO 2764CTO
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-6-generic root=/dev/mapper/primary-root 
ro crashkernel=384M-2G:64M,2G-:128M quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: qemu-kvm
dmi.bios.date: 04/19/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 7UET86WW (3.16 )
dmi.board.name: 2764CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvr7UET86WW(3.16):bd04/19/2010:svnLENOVO:pn2764CTO:pvrThinkPadT400:rvnLENOVO:rn2764CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2764CTO
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO