Public bug reported:
1)
% lsb_release -rd
Description: Ubuntu 22.04.5 LTS
Release: 22.04
2)
% apt-cache policy qemu-system-x86
qemu-system-x86:
Installed: 1:6.2+dfsg-2ubuntu6.24
Candidate: 1:6.2+dfsg-2ubuntu6.24
Version table:
*** 1:6.2+dfsg-2ubuntu6.24 500
500 http://us.archive.ubuntu.com/ubuntu jammy-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
100 /var/lib/dpkg/status
1:6.2+dfsg-2ubuntu6 500
500 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
3) size of /dev/nvme0n1 in VM matches virtual size of raw image file on
host 1024G (1 TiB)
4) size of /dev/nvme0n1 size in VM looks too big, like an integer
overflow
% qemu-img info nvme.img
image: nvme.img
file format: raw
virtual size: 1 TiB (1099511627776 bytes)
disk size: 1 MiB
ubuntu@ubuntu:~$ cat /proc/partitions
major minor #blocks name
8 0 209715200 sda
8 1 208552943 sda1
8 13 1047552 sda13
8 14 4096 sda14
8 15 108544 sda15
11 0 366 sr0
2 0 4 fd0
259 0 9223372035781033984 nvme0n1
--
testing this out on Ubuntu Noble (24.04) which has qemu 8.2 does not show this
issue.
It would be nice to get a backport of whatever fix went into 8.2 into
6.2
Here's a simple reproducer:
1) qemu-img create -f raw nvme.img 1024G
2) wget
https://cloud-images.ubuntu.com/minimal/daily/plucky/current/plucky-minimal-cloudimg-amd64.img
3) qemu-img create -f qcow2 -F qcow2 -b plucky-minimal-cloudimg-amd64.img
plucky.img 20G
4) cat > user-data <<EOF
#cloud-config
password: passw0rd
chpasswd: { expire: False }
ssh_pwauth: True
EOF
5) cat > meta-data <<EOF
instance-id: 2b8a0076-bdf6-4ddb-a941-d4ebd652ce54
EOF
6) cloud-localds plucky-nvme-cidata.iso user-data meta-data
7) qemu-system-x86_64 -name plucky-nvme -smp 2 -m 2048 --enable-kvm -drive
id=disk0,if=none,format=qcow2,file=plucky.img -drive
id=cdrom0,if=none,media=cdrom,file=plucky-nvme-cidata.iso -device
ide-hd,id=idedrv0,drive=disk0 -device ide-cd,id=idedrv1,drive=cdrom0 -drive
id=nvme0,if=none,format=raw,file=nvme.img -device
nvme,id=nvmedev0,drive=nvme0,serial=nvme123456 -net user,hostfwd=tcp::22222-:22
-net nic,model=virtio -nographic -object
rng-random,filename=/dev/urandom,id=rng0 -serial mon:stdio
8) login as ubuntu
9) cat /proc/partitions
For any size of NVME disk <1TiB (even 1K less) the size is reported
correctly. Switching to ide, scsi or virtio device also fixes the disk
size reporting in guest.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: qemu-system-x86 1:6.2+dfsg-2ubuntu6.24
ProcVersionSignature: Ubuntu 6.8.0-52.53~22.04.1-generic 6.8.12
Uname: Linux 6.8.0-52-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.20.11-0ubuntu82.6
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Wed Feb 19 14:31:35 2025
MachineType: ASUS System Product Name
ProcEnviron:
LC_TIME=en_GB.UTF-8
TERM=screen-256color-bce
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-52-generic
root=UUID=69898701-f49d-4942-87a5-85b4e512e4f4 ro default_hugepagesz=1GB
hugepagesz=1G hugepages=12 kvm_amd.sev=1 mitigations=off
SourcePackage: qemu
UpgradeStatus: Upgraded to jammy on 2024-05-18 (277 days ago)
dmi.bios.date: 07/13/2021
dmi.bios.release: 15.2
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1502
dmi.board.asset.tag: Default string
dmi.board.name: PRIME TRX40-PRO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1502:bd07/13/2021:br15.2:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnPRIMETRX40-PRO:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: ASUS
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Affects: qemu (Ubuntu Jammy)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy
** Also affects: qemu (Ubuntu Jammy)
Importance: Undecided
Status: New
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2098896
Title:
nvme disks 1TiB or greater show incorrect size
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