Public bug reported:
Ubuntu 20.04.3
Kernel: 5.4.0-1028-bluefield
ii isc-dhcp-client 4.4.1-2.1ubuntu5.20.04.2
arm64 DHCP client for
automatically obtaining an IP address
ii isc-dhcp-common 4.4.1-2.1ubuntu5.20.04.2
arm64 common manpages relevant
to all of the isc-dhcp packages
ii apparmor 2.13.3-7ubuntu5.1
arm64 user-space parser utility
for AppArmor
ii libapparmor1:arm64 2.13.3-7ubuntu5.1
arm64 changehat AppArmor library
ii network-manager 1.22.10-1ubuntu2.3
arm64 network management framework (daemon and userspace tools)
Configuration:
--------------
# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
ethernets:
oob_net0:
dhcp4: true
tmfifo_net0:
addresses:
- 192.168.100.2/30
dhcp4: false
nameservers:
addresses:
- 192.168.100.1
routes:
- metric: 1025
to: 0.0.0.0/0
via: 192.168.100.1
renderer: NetworkManager
version: 2
Dmesg:
-----
[59685.099760] audit: type=1400 audit(1645193286.508:2011): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/103303/task/103306/comm" pid=103303 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59685.148687] audit: type=1400 audit(1645193286.560:2012): apparmor="DENIED"
operation="mknod" profile="/{,usr/}sbin/dhclient"
name="/run/NetworkManager/dhclient-oob_net0.pid" pid=103303 comm="dhclient"
requested_mask="c" denied_mask="c" fsuid=0 ouid=0
[59926.641500] audit: type=1400 audit(1645193528.052:2013): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104083/task/104084/comm" pid=104083 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59926.641685] audit: type=1400 audit(1645193528.052:2014): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104083/task/104085/comm" pid=104083 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59926.641776] audit: type=1400 audit(1645193528.052:2015): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104083/task/104086/comm" pid=104083 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59931.623506] audit: type=1400 audit(1645193533.032:2016): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104158/task/104159/comm" pid=104158 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59931.623665] audit: type=1400 audit(1645193533.032:2017): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104158/task/104160/comm" pid=104158 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59931.623758] audit: type=1400 audit(1645193533.032:2018): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104158/task/104161/comm" pid=104158 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.017642] audit: type=1400 audit(1645193631.428:2019): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104353/task/104354/comm" pid=104353 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.017810] audit: type=1400 audit(1645193631.428:2020): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104353/task/104355/comm" pid=104353 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.017907] audit: type=1400 audit(1645193631.428:2021): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104353/task/104356/comm" pid=104353 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.073115] audit: type=1400 audit(1645193631.484:2022): apparmor="DENIED"
operation="mknod" profile="/{,usr/}sbin/dhclient"
name="/run/NetworkManager/dhclient-oob_net0.pid" pid=104353 comm="dhclient"
requested_mask="c" denied_mask="c" fsuid=0 ouid=0
** Affects: isc-dhcp (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1961413
Title:
[BLUEFIELD] dmesg is flooded with apparmor="DENIED" for dhclient
messages
Status in isc-dhcp package in Ubuntu:
New
Bug description:
Ubuntu 20.04.3
Kernel: 5.4.0-1028-bluefield
ii isc-dhcp-client 4.4.1-2.1ubuntu5.20.04.2
arm64 DHCP client for
automatically obtaining an IP address
ii isc-dhcp-common 4.4.1-2.1ubuntu5.20.04.2
arm64 common manpages relevant
to all of the isc-dhcp packages
ii apparmor 2.13.3-7ubuntu5.1
arm64 user-space parser
utility for AppArmor
ii libapparmor1:arm64 2.13.3-7ubuntu5.1
arm64 changehat AppArmor
library
ii network-manager 1.22.10-1ubuntu2.3
arm64 network management framework (daemon and userspace tools)
Configuration:
--------------
# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
ethernets:
oob_net0:
dhcp4: true
tmfifo_net0:
addresses:
- 192.168.100.2/30
dhcp4: false
nameservers:
addresses:
- 192.168.100.1
routes:
- metric: 1025
to: 0.0.0.0/0
via: 192.168.100.1
renderer: NetworkManager
version: 2
Dmesg:
-----
[59685.099760] audit: type=1400 audit(1645193286.508:2011): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/103303/task/103306/comm" pid=103303 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59685.148687] audit: type=1400 audit(1645193286.560:2012): apparmor="DENIED"
operation="mknod" profile="/{,usr/}sbin/dhclient"
name="/run/NetworkManager/dhclient-oob_net0.pid" pid=103303 comm="dhclient"
requested_mask="c" denied_mask="c" fsuid=0 ouid=0
[59926.641500] audit: type=1400 audit(1645193528.052:2013): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104083/task/104084/comm" pid=104083 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59926.641685] audit: type=1400 audit(1645193528.052:2014): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104083/task/104085/comm" pid=104083 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59926.641776] audit: type=1400 audit(1645193528.052:2015): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104083/task/104086/comm" pid=104083 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59931.623506] audit: type=1400 audit(1645193533.032:2016): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104158/task/104159/comm" pid=104158 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59931.623665] audit: type=1400 audit(1645193533.032:2017): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104158/task/104160/comm" pid=104158 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[59931.623758] audit: type=1400 audit(1645193533.032:2018): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104158/task/104161/comm" pid=104158 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.017642] audit: type=1400 audit(1645193631.428:2019): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104353/task/104354/comm" pid=104353 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.017810] audit: type=1400 audit(1645193631.428:2020): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104353/task/104355/comm" pid=104353 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.017907] audit: type=1400 audit(1645193631.428:2021): apparmor="DENIED"
operation="open" profile="/{,usr/}sbin/dhclient"
name="/proc/104353/task/104356/comm" pid=104353 comm="dhclient"
requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
[60030.073115] audit: type=1400 audit(1645193631.484:2022): apparmor="DENIED"
operation="mknod" profile="/{,usr/}sbin/dhclient"
name="/run/NetworkManager/dhclient-oob_net0.pid" pid=104353 comm="dhclient"
requested_mask="c" denied_mask="c" fsuid=0 ouid=0
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