Thank you for your prompt attention! I can confirm your test kernel resolves this issue:
# uname -v #154~lp1772575 SMP Tue May 22 16:06:05 UTC 2018 # blockdev --getsize64 /dev/nbd0 1181116006400 # fdisk -l /dev/nbd0 | head -1 Disk /dev/nbd0: 1.1 TiB, 1181116006400 bytes, 2306867200 sectors -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1772575 Title: Kernel 4.4 NBD size overflow with image size exceeding 1TB Status in linux package in Ubuntu: Invalid Status in linux source package in Xenial: In Progress Bug description: Release 16.04, kernel 4.4.0-124-generic There's an issue in kernel's NBD module which prevents some larger images to be correctly "connected" , largely described here: https://github.com/NetworkBlockDevice/nbd/issues/44 There is a small patch here that was accepted into mainline 4.10: https://www.spinics.net/lists/linux-block/msg07060.html This is a regression from the previous LTS 3.13 kernel. ---- Here is a small example of the faulty behaviour: # qemu-img create -f qcow2 test.img 1100G Formatting 'test.img', fmt=qcow2 size=1181116006400 cluster_size=65536 lazy_refcounts=off refcount_bits=16 # qemu-nbd -c /dev/nbd0 test.img # blockdev --getsize64 /dev/nbd0 18446743055802302464 The correct response would be 1181116006400; this breaks most tools and makes the image unusable, e.g. # fdisk -l /dev/nbd0 fdisk: cannot open /dev/nbd0: Invalid argument --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 May 21 12:51 seq crw-rw---- 1 root audio 116, 33 May 21 12:51 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.20.1-0ubuntu2.17 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=/dev/mapper/VolGroup00-swap_1 IwConfig: Error: [Errno 2] No such file or directory MachineType: Supermicro SYS-1028R-WTR Package: linux (not installed) PciMultimedia: ProcEnviron: LANGUAGE=en_AU: TERM=xterm PATH=(custom, no user) LANG=en_AU SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-124-generic root=/dev/mapper/VolGroup00-root ro nomodeset elevator=noop consoleblank=0 net.ifnames=0 biosdevname=0 modprobe.blacklist=igb nosplash quiet ProcVersionSignature: Ubuntu 4.4.0-124.148-generic 4.4.117 RelatedPackageVersions: linux-restricted-modules-4.4.0-124-generic N/A linux-backports-modules-4.4.0-124-generic N/A linux-firmware 1.157.18 RfKill: Error: [Errno 2] No such file or directory Tags: xenial xenial Uname: Linux 4.4.0-124-generic x86_64 UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: False dmi.bios.date: 02/08/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3.0a dmi.board.asset.tag: Default string dmi.board.name: X10DRW-i dmi.board.vendor: Supermicro dmi.board.version: 1.10 dmi.chassis.asset.tag: Default string dmi.chassis.type: 1 dmi.chassis.vendor: Supermicro dmi.chassis.version: 0123456789 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3.0a:bd02/08/2018:svnSupermicro:pnSYS-1028R-WTR:pvr0123456789:rvnSupermicro:rnX10DRW-i:rvr1.10:cvnSupermicro:ct1:cvr0123456789: dmi.product.name: SYS-1028R-WTR dmi.product.version: 0123456789 dmi.sys.vendor: Supermicro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1772575/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
