Public bug reported:
As root:
strace -u root -f -tt -p `pidof loop9` 2>&1 | tee strace-loop9.log
results in:
strace: Could not attach to process. If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again
as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf: Operation
not permitted
strace: attach: ptrace(PTRACE_SEIZE, 24039): Operation not permitted
cat /proc/sys/kernel/yama/ptrace_scope
0
tail -1 /etc/sysctl.d/10-ptrace.conf
kernel.yama.ptrace_scope = 0
ps -aux | grep `pidof loop9`
root 24039 0.0 0.0 0 0 ? S< Jul23 0:00 [loop9]
sudo lsof -p 24039
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
loop9 24039 root cwd DIR 8,5 4096 2 /
loop9 24039 root rtd DIR 8,5 4096 2 /
loop9 24039 root txt unknown /proc/24039/exe
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-54-generic 4.15.0-54.58
ProcVersionSignature: Ubuntu 4.15.0-54.58-generic 4.15.18
Uname: Linux 4.15.0-54-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: adam 26412 F.... pulseaudio
/dev/snd/controlC1: adam 26412 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 24 10:27:30 2019
InstallationDate: Installed on 2019-04-18 (96 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 20DFS0AU06
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-54-generic
root=UUID=4e1fbd6c-b1e7-4cbf-b560-5c364ef63dff ro quiet splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-54-generic N/A
linux-backports-modules-4.15.0-54-generic N/A
linux-firmware 1.173.9
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/27/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: J5ET53WW (1.24 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20DFS0AU06
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrJ5ET53WW(1.24):bd04/27/2016:svnLENOVO:pn20DFS0AU06:pvrThinkPadE550:rvnLENOVO:rn20DFS0AU06:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad E550
dmi.product.name: 20DFS0AU06
dmi.product.version: ThinkPad E550
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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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/1837713
Title:
Cannot run strace on snapd process
Status in linux package in Ubuntu:
New
Bug description:
As root:
strace -u root -f -tt -p `pidof loop9` 2>&1 | tee strace-loop9.log
results in:
strace: Could not attach to process. If your uid matches the uid of the
target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf:
Operation not permitted
strace: attach: ptrace(PTRACE_SEIZE, 24039): Operation not permitted
cat /proc/sys/kernel/yama/ptrace_scope
0
tail -1 /etc/sysctl.d/10-ptrace.conf
kernel.yama.ptrace_scope = 0
ps -aux | grep `pidof loop9`
root 24039 0.0 0.0 0 0 ? S< Jul23 0:00 [loop9]
sudo lsof -p 24039
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
loop9 24039 root cwd DIR 8,5 4096 2 /
loop9 24039 root rtd DIR 8,5 4096 2 /
loop9 24039 root txt unknown /proc/24039/exe
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-54-generic 4.15.0-54.58
ProcVersionSignature: Ubuntu 4.15.0-54.58-generic 4.15.18
Uname: Linux 4.15.0-54-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: adam 26412 F.... pulseaudio
/dev/snd/controlC1: adam 26412 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 24 10:27:30 2019
InstallationDate: Installed on 2019-04-18 (96 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
MachineType: LENOVO 20DFS0AU06
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-54-generic
root=UUID=4e1fbd6c-b1e7-4cbf-b560-5c364ef63dff ro quiet splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-54-generic N/A
linux-backports-modules-4.15.0-54-generic N/A
linux-firmware 1.173.9
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/27/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: J5ET53WW (1.24 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20DFS0AU06
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrJ5ET53WW(1.24):bd04/27/2016:svnLENOVO:pn20DFS0AU06:pvrThinkPadE550:rvnLENOVO:rn20DFS0AU06:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad E550
dmi.product.name: 20DFS0AU06
dmi.product.version: ThinkPad E550
dmi.sys.vendor: LENOVO
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