Bug#649349: xen-hypervisor-4.1-amd64: pygrub fails due to invalid opcode trapped

Package: xen-hypervisor-4.1-amd64
Version: 4.1.1-3
Severity: important

Whenever I try to start a domU, xm create failed for
'Boot loader didn't return any data!'.

% sudo xm create -c squeeze.cfg
Using config file "/etc/xen/squeeze.cfg".
Error: Boot loader didn't return any data!

It seems related to the following error in dmesg
[1440.163935] pygrub[3654] trap invalid opcode ip:7f732a997c50 sp:7fff60eb2258 error:0 in ld-2.13.so[7f732a984000+1f000]

Note that pygrub does NOT fail If I launch 'pygrub mydisk.img' on a standard
kernel boot, only if the hypervisor is used (tested with linux-image-3.0.0
and linux-image-2.39.2)

Here are logs taken from xend.log

[2011-11-20 09:01:11 2779] DEBUG (XendDomainInfo:103) XendDomainInfo.create(['vm', ['name', 'squeeze'], ['memory', '128'], ['on_poweroff', 'destroy'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], ['vcpus', '2'], ['oos', 1], ['bootloader', '/usr/lib/xen-default/bin/pygrub'], ['bootloader_args', ''], ['image', ['linux', ['root', '/dev/xvda2 ro'], ['videoram', 4], ['tsc_mode', 0], ['nomigrate', 0]]], ['s3_integrity', 1], ['device', ['vbd', ['uname', 'file:/home/xen/data/xen/domains/squeeze/disk.img'], ['dev', 'xvda2'], ['mode', 'w']]], ['device', ['vbd', ['uname', 'file:/home/xen/data/xen/domains/squeeze/swap.img'], ['dev', 'xvda1'], ['mode', 'w']]], ['device', ['vif', ['ip', '192.168.1.42'], ['mac', '00:16:3E:3A:04:EB'], ['bridge', 'xenbr0']]]])
[2011-11-20 09:01:11 2779] DEBUG (XendDomainInfo:2498) XendDomainInfo.constructDomain
[2011-11-20 09:01:11 2779] DEBUG (balloon:187) Balloon: 1687712 KiB free; need 16384; done.
[2011-11-20 09:01:11 2779] DEBUG (XendDomain:476) Adding Domain: 3
[2011-11-20 09:01:11 2779] DEBUG (XendDomainInfo:2836) XendDomainInfo.initDomain: 3 256
[2011-11-20 09:01:11 3654] DEBUG (XendBootloader:113) Launching bootloader as ['/usr/lib/xen-default/bin/pygrub', '--args=root=/dev/xvda2 ro ', '--output=/var/run/xend/boot/xenbl.8881', '/home/starch/data/xen/domains/squeeze/disk.img'].
[2011-11-20 09:01:11 2779] ERROR (XendBootloader:214) Boot loader didn't return any data!
[2011-11-20 09:01:11 2779] ERROR (XendDomainInfo:488) VM start failed
Traceback (most recent call last):
File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendDomainInfo.py", line 474, in start
XendTask.log_progress(31, 60, self._initDomain)
File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendTask.py", line 209, in log_progress
retval = func(*args, **kwds)
File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendDomainInfo.py", line 2838, in _initDomain
self._configureBootloader()
File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendDomainInfo.py", line 3285, in _configureBootloader
bootloader_args, kernel, ramdisk, args)
File "/usr/lib/xen-4.1/bin/../lib/python/xen/xend/XendBootloader.py", line 215, in bootloader
raise VmError, msg
VmError: Boot loader didn't return any data!
[2011-11-20 09:01:11 2779] DEBUG (XendDomainInfo:3071) XendDomainInfo.destroy: domid=3
[2011-11-20 09:01:11 2779] DEBUG (XendDomainInfo:2406) No device model
[2011-11-20 09:01:11 2779] DEBUG (XendDomainInfo:2408) Releasing devices
[2011-11-20 09:01:11 2779] ERROR (XendDomainInfo:108) Domain construction failed



Debian Release: wheezy/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.39-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

xen-hypervisor-4.1-amd64 depends on no packages.

Versions of packages xen-hypervisor-4.1-amd64 recommends:
ii xen-utils-4.1 4.1.1-3

Versions of packages xen-hypervisor-4.1-amd64 suggests:
pn xen-docs-4.1 <none>




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