[Oneiric] Kernel Panic doing PXE/NFS boot

[TJ]

In a PXE netboot environment we can boot from LiveCD images of all releases except 11.10.

Using a serial console we see:

...
[ 0.000000] Linux version 3.0.0-12-generic (buildd@vernadsky) (gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) ) #20-Ubuntu SMP Fri Oct 7 14:50:42 UTC 2011 (Ubuntu 3.0.0-12.20-generic 3.0.4)
...
[ 0.000000] Kernel command line: root=/dev/nfs boot=casper netboot=nfs nfsroot=10.254.251.2:/srv/boot/iso-image/ubuntu-11.10-desktop-i386 initrd=iso-image/ubuntu-11.10-desktop-i386/casper/initrd.lz ip=10.254.251.88 debug=y console=ttyS0,115200n8 console=tty0 BOOT_IMAGE=iso-image/ubuntu-11.10-desktop-i386/casper/vmlinuz
...
Begin: Mounting root file system ... + . /scripts/casper
+ export PATH=/usr/bin:/usr/sbin:/bin:/sbin
+ mountpoint=/cdrom
+ LIVE_MEDIA_PATH=casper
+ [ -f /conf/uuid.conf ]
+ cat /conf/uuid.conf
+ UUID=d74ce5f7-b61c-4560-8185-491e5386a284
+ root_persistence=casper-rw
+ home_persistence=home-rw
+ root_snapshot_label=casper-sn
+ home_snapshot_label=home-sn
+ USERNAME=casper
+ USERFULLNAME=Live session user
+ HOST=live
+ BUILD_SYSTEM=Custom
+ mkdir -p /cdrom
+ tried=/tmp/tried
+ [ -f /etc/casper.conf ]
+ . /etc/casper.conf
+ export USERNAME=ubuntu
+ export USERFULLNAME=Live session user
+ export HOST=ubuntu
+ export BUILD_SYSTEM=Ubuntu
+ export USERNAME USERFULLNAME HOST BUILD_SYSTEM
+ . /scripts/casper-helpers
+ [ Ubuntu = Debian ]
+ [ Ubuntu = Ubuntu ]
+ MP_QUIET=-q
+ [ ! -x /bin/fstype ]
+ [ ! -f /casper.vars ]
+ touch /casper.vars
+ parse_numeric /dev/nfs
+ return
+ maybe_break mountroot
+ echo+ egrep -q (,|^)mountroot(,|$)

+ mountroot
+ exec
+ exec
+ exec
+ exec
+ tailpid=272
+ + parse_cmdline
tail -f casper.log
+ cat /proc/cmdline
[ 8.115989] Kernel panic - not syncing: Attempted to kill init!
[ 8.121985] Pid: 1, comm: init Not tainted 3.0.0-12-generic #20-Ubuntu
[ 8.128550] Call Trace:
[ 8.131012] [<c1518c98>] ? printk+0x2d/0x2f
[ 8.135314] [<c1518b76>] panic+0x5c/0x151
[ 8.139433] [<c104b244>] forget_original_parent+0x1e4/0x1f0
[ 8.145117] [<c10d3020>] ? perf_cgroup_attach_task+0x20/0x20
[ 8.150884] [<c104b263>] exit_notify+0x13/0x140
[ 8.155521] [<c104ba6d>] do_exit+0x1ad/0x3a0
[ 8.159902] [<c112863d>] ? vfs_write+0xed/0x160
+ STATICIP=10.25[ 8.164565] [<c104bdb8>] do_group_exit+0x38/0xa0
4.251.88
+ [ 1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Stéphane Graber (stgraber)]

Tentatively re-assigning to the kernel, it's not clear if it's an actual kernel crash or something triggered by an invalid nfs share.

[Joseph Salisbury (jsalisbury)]

We would like to collect some additional information about your system. From a terminal, please run the following:

apport-collect 923217

[Joseph Salisbury (jsalisbury)]

Also, is this only happening on one specific model of machine? Are you able to boot that LiveCD image on other machines?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]