19.04 live server ISO, SQUASHFS errors on boot

Bug #1842197 reported by Chris Murphy on 2019-09-01
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
subiquity
Undecided
Unassigned

Bug Description

1. Download ubuntu-19.04-live-server-amd64.iso from
https://ubuntu.com/#download
2. Confirm I have the same sha1sum as published from
http://releases.ubuntu.com/19.04/SHA1SUMS
3. Boot the ISO in a qemu kvm VM using virt-manager
4. Choose 'check disk for defects' option - disk passes
5. Boot again, switch to tty2
6. dmesg | grep SQUASHFS

Actual result:

Multiple squashfs related read errors
[ 4.769520] SQUASHFS error: squashfs_read_data failed to read block 0x6261746d79732e
[ 4.769548] SQUASHFS error: Unable to read metadata cache entry [6261746d79732e]

Expected result:

squashfs shouldn't complaint about errors in the image

Additional information:

The block address reported is different each time I boot. There are always five errors, but the block addresses differ each boot.

Complete qemu command for the VM

/usr/bin/qemu-system-x86_64 -name guest=uefivm,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-5-uefivm/master-key.aes -machine pc-q35-4.0,accel=kvm,usb=off,vmport=off,dump-guest-core=off -cpu SandyBridge-IBRS,vme=on,ss=on,vmx=on,pcid=on,hypervisor=on,arat=on,tsc-adjust=on,umip=on,md-clear=on,stibp=on,arch-capabilities=on,ssbd=on,xsaveopt=on,skip-l1dfl-vmentry=on -drive file=/usr/share/edk2/ovmf/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on -drive file=/var/lib/libvirt/qemu/nvram/uefivm_VARS.fd,if=pflash,format=raw,unit=1 -m 3072 -overcommit mem-lock=off -smp 4,sockets=4,cores=1,threads=1 -uuid 05d0a9c8-6a0e-4bbc-b36c-5e0082b987ee -no-user-config -nodefaults -chardev socket,id=charmonitor,fd=37,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -global ICH9-LPC.disable_s3=1 -global ICH9-LPC.disable_s4=1 -boot strict=on -device pcie-root-port,port=0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x2 -device pcie-root-port,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x2.0x1 -device pcie-root-port,port=0x12,chassis=3,id=pci.3,bus=pcie.0,addr=0x2.0x2 -device pcie-root-port,port=0x13,chassis=4,id=pci.4,bus=pcie.0,addr=0x2.0x3 -device pcie-root-port,port=0x14,chassis=5,id=pci.5,bus=pcie.0,addr=0x2.0x4 -device pcie-root-port,port=0x15,chassis=6,id=pci.6,bus=pcie.0,addr=0x2.0x5 -device pcie-root-port,port=0x16,chassis=7,id=pci.7,bus=pcie.0,addr=0x2.0x6 -device qemu-xhci,p2=15,p3=15,id=usb,bus=pci.2,addr=0x0 -device virtio-serial-pci,id=virtio-serial0,bus=pci.3,addr=0x0 -drive file=/var/lib/libvirt/images/untitled.qcow2,format=qcow2,if=none,id=drive-virtio-disk0,cache=unsafe,aio=threads -device virtio-blk-pci,scsi=off,bus=pci.4,addr=0x0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=2,write-cache=on -drive file=/var/lib/libvirt/images/ubuntu-19.04-live-server-amd64.iso,format=raw,if=none,id=drive-sata0-0-0,readonly=on -device ide-cd,bus=ide.0,drive=drive-sata0-0-0,id=sata0-0-0,bootindex=1 -netdev tap,fd=39,id=hostnet0,vhost=on,vhostfd=40 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:7c:25:f9,bus=pci.1,addr=0x0 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=charchannel0,fd=41,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -chardev spicevmc,id=charchannel1,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=2,chardev=charchannel1,id=channel1,name=com.redhat.spice.0 -device usb-tablet,id=input0,bus=usb.0,port=1 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1,bus=pcie.0,addr=0x1 -device ich9-intel-hda,id=sound0,bus=pcie.0,addr=0x1b -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=2 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=3 -device virtio-balloon-pci,id=balloon0,bus=pci.5,addr=0x0 -object rng-random,id=objrng0,filename=/dev/urandom -device virtio-rng-pci,rng=objrng0,id=rng0,bus=pci.6,addr=0x0 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg timestamp=on

host info:
CPU i7-2820QM
8GiB RAM, 8GiB swap on ZRAM
kernel 5.2.11-200.fc30.x86_64
qemu-kvm-4.1.0-1.fc31.x86_64

Chris Murphy (dr4-b5gpiyla-tff) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1842197/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

tags: added: bot-comment
Paul White (paulw2u) on 2019-09-01
affects: ubuntu → subiquity
Michael Hudson-Doyle (mwhudson) wrote :

This has gotten worse in eoan, see bug 1840122.

Michael Hudson-Doyle (mwhudson) wrote :

Turns out this is a kernel bug, marking as duplicate.

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