It already happens with: 4.12.0-041200rc1-generic #201705131731
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https://bugs.launchpad.net/bugs/1740309
Title:
user space process hangs when reading partition table of disk
Status in linux package in Ubuntu:
Confirmed
Bug description:
user space process as in parted or fdisk or update-grub2 that read partition
tables freeze on my system:
/dev/sda/ GPT disk with efi, swap and ubuntu artful partition
/dev/sdb old style partition table with one ext4 partition
/dev/sdc GPT disk with efi partition, windows 10
I.e. if I run as root :
# fdisk -l
Disk /dev/sda: 232,9 GiB, 250059350016 bytes, 488397168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 56FF6AB0-076F-483C-890F-EC4B4FAF6313
Device Start End Sectors Size Type
/dev/sda1 2048 2000895 1998848 976M EFI System
/dev/sda2 2000896 10000383 7999488 3,8G Linux swap
/dev/sda3 10000384 488396799 478396416 228,1G Linux filesystem
Disk /dev/sdb: 489,1 GiB, 525112713216 bytes, 1025610768 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x2f11f9c4
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 1025609727 1025607680 489G 83 Linux
<...process hangs here forever...>
With gdb I stepped through fdisk -l and saw that the call to open
('dev/sdc'..) never returns.
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ApportVersion: 2.20.7-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC0D3p: andreas 1807 F...m pulseaudio
/dev/snd/controlC0: andreas 1807 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 17.10
HibernationDevice: RESUME=UUID=8a7a6077-0a3e-4641-8f15-bd6f09826510
InstallationDate: Installed on 2017-12-26 (1 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
IwConfig:
lo no wireless extensions.
enp8s0 no wireless extensions.
enp12s0 no wireless extensions.
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
Package: linux-image-4.13.0-21-generic 4.13.0-21.24
PackageArchitecture: amd64
ProcFB:
0 radeondrmfb
1 astdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-21-generic.efi.signed
root=UUID=4f18ad67-a4f0-4e03-b061-66615751538e ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
RelatedPackageVersions:
linux-restricted-modules-4.13.0-21-generic N/A
linux-backports-modules-4.13.0-21-generic N/A
linux-firmware 1.169.1
RfKill:
Tags: artful
Uname: Linux 4.13.0-21-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/09/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.80
dmi.board.name: EP2C602
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.80:bd12/09/2013:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnEP2C602:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
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