** Summary changed: - [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep + unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1398859 Title: unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep Status in systemd package in Ubuntu: Triaged Bug description: Since Mid-November the udisks2 test (https://jenkins.qa.ubuntu.com/job /vivid-adt-udisks2/? shows it happened between Nov 13 and 19) exhibits a regression with NTFS: Unmounting causes the ntfs-3g process to go into kernel deep sleep and umount hangs forever. This can be reproduced with sudo apt install ntfs-3g sudo modprobe scsi_debug # check dmesg which drive this created; e. g. /dev/sda sudo mkntfs -F /dev/sda sudo mount /dev/sda /mnt Now you have a process which is happy: root 12821 0.0 0.0 15272 1948 ? Ss 15:49 0:00 /sbin/mount.ntfs /dev/sda /mnt -o rw You can work with /mnt, edit files, etc. But now unmount: sudo umount /mnt This never returns, and the process goes into uninterruptible kernel sleep ("D"): root 12928 0.0 0.0 15272 1948 ? Ds 15:55 0:00 /sbin/mount.ntfs /dev/sda /mnt -o rw The strace for the umount until the hang is ubuntu@autopkgtest:~$ sudo strace -vvtts1024 -p 12928 Process 12928 attached 15:56:17.938299 read(4, "0\0\0\0\2\0\0\0\2\0\0\0\0\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0\0\0\0\0", 135168) = 48 15:56:22.338931 read(4, "(\0\0\0&\0\0\0\3\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 135168) = 40 15:56:22.339637 sendto(5, "<29>Dec 3 15:56:22 ntfs-3g[12928]: Unmounting /dev/sda ()\n", 59, MSG_NOSIGNAL, NULL, 0) = 59 15:56:22.340509 fsync(3) = 0 15:56:22.341188 fcntl(3, F_SETLK, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0}) = 0 15:56:22.341759 close(3 ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: ntfs-3g 1:2013.1.13AR.1-2ubuntu3 ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7 Uname: Linux 3.16.0-25-generic x86_64 ApportVersion: 2.15-0ubuntu1 Architecture: amd64 CurrentDesktop: Unity Date: Wed Dec 3 15:48:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-11-20 (13 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141119) SourcePackage: ntfs-3g UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1398859/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
