[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
This works fine on Debian and Fedora, with the same udev upstream
version. I verified that the hang still happens with Debian's kernel or
Debian's udev+libudev1 packages. If I install just the systemd binary
package from Debian, the hang goes away. More specifically, installing
Debian's /lib/systemd/systemd as /lib/systemd/systemd-debian and booting
that (with init) also makes the bug go away. So something in our Ubuntu
patches causes this.
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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)
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[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
Just in case I need it again, this is the git bisect run script that I
used.
** Attachment added: "bisecting script"
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1398859/+attachment/4274573/+files/do-test.sh
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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:
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[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
Curiously enough, this does not happen on Debian sid nor Fedora, even
though I can reproduce it just fine with udevd built straight out of
upstream master on ubuntu. So it seems something else gets in the way
then (different kernel?)
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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:
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[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
Correction, previous bisect apparently was unclean. I clean/rebuild
everything now, and it's pointing to
http://cgit.freedesktop.org/systemd/systemd/commit/?id=02ba8fb3357daf5 .
Reverting this indeed fixes the problem.
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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:
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[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
Bisected to
http://cgit.freedesktop.org/systemd/systemd/commit/?id=e9fc29f4ecc9509cc
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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:
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[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
This works when stopping udevd. When it's running, a worker gets stuck:
root 25350 0.0 0.2 41212 2060 ?Ds 11:14 0:00
/lib/systemd/systemd-udevd --daemon
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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
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[Touch-packages] [Bug 1398859] Re: [udev regression] unmounting NTFS causes mount.ntfs process to get stuck in eternal kernel deep sleep
It's enough to downgrade udev before the "umount /mnt", everything else
works with 215. Conversely, mkfs/mount with 208, upgrading to udev 215,
and umount then hangs. stracing umount /mnt indeed hangs forever in the
umount() call.
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https://bugs.launchpad.net/bugs/1398859
Title:
[udev regression] 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)
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