kernel-packages team mailing list archive

[Scott Moser <smoser@xxxxxxxxxx>]

fix uploaded.
just for some more information, can fairly easily reproduce this bug using a cloud image:

img_url="http://cloud-images.ubuntu.com/daily/server/vivid/current/vivid-server-cloudimg-amd64-disk1.img";                                                       
img_dl="${img_url##*/}"                                                         
wget -O "$img_dl" "$img_url"                                                    
qemu-img convert -O qcow2 "$img_dl" "disk.img.dist"                             
qemu-img create -f qcow2 -b disk.img.dist disk.img                              

# pull out kernel/initramfs                                                  
sudo mount-image-callback disk.img --read-only -- \                             
   sh -xc 'cp $MOUNTPOINT/boot/vmlinu?-* kernel &&                              
           cp $MOUNTPOINT/boot/initrd.* initrd &&                               
           chmod ugo+r kernel initrd'

# boot qemu, should boot to bash prompt, currently on vivid (3.18 + 0.25ubuntu1) will kernel panic
qemu-system-x86_64 -enable-kvm -m 1024 \                                        
   -drive if=virtio,file=disk.img \                                             
   -kernel kernel -initrd initrd \                                              
   -append "root=LABEL=cloudimg-rootfs overlayroot=tmpfs:debug=1 console=ttyS0 init=/bin/bash" \                                                                
   -nographic -echr 0x5    

# patchin a new deb
sudo mount-image-callback disk.img -- \                                         
   sh -exc '                                                                    
     deb=$1; shift;                                                             
     cp $deb $MOUNTPOINT/tmp/fix.deb                                            
     chroot $MOUNTPOINT dpkg -i /tmp/fix.deb                                    
     rm $MOUNTPOINT/tmp/fix.deb' -- overlayroot_0.26ubuntu1_all.deb  

# then re-copy out the kernel and boot again to see fix.

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https://bugs.launchpad.net/bugs/1411294

Title:
  kernel panic during MAAS fastpath install of Vivid images

Status in cloud-initramfs-tools package in Ubuntu:
  In Progress
Status in linux package in Ubuntu:
  Triaged

Bug description:
  There appears to be an issue with the use of overlayfs in the image.
  See the attached screenshot for details. Immediately after that
  overlayfs error the kernel panics.

To manage notifications about this bug go to:
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