[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Hey, Upgraded to Ubuntu 17.10 and had to do the workaround again for sudo aa-complain /sbin/dhclient New programs are also affected. I had to run also: sudo aa-complain /usr/lib/telepathy/mission-control-5 @dhutchison69 it is not clear where the line should go. ** Summary changed: - dhclient segfaults on ubuntu 17.04 + dhclient segfaults on ubuntu 17.04 and 17.10 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 and 17.10 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Works on aa-enforce. ** Attachment added: "sbin.dhclient" https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+attachment/4964763/+files/sbin.dhclient -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Actually, I was able to connect with the exact same fix I used for the
cups issue:
add
@{PROC}/*/cmdline r,
to /etc/apparmor.d/sbin.dhclient
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https://bugs.launchpad.net/bugs/1696499
Title:
dhclient segfaults on ubuntu 17.04
Status in isc-dhcp package in Ubuntu:
Confirmed
Bug description:
After upgrading, network-manager stopped running DHCP, after trying to
run dhclient myself I found out it segfaults. Attached is its strace
output.
I can connect to the internet by stopping network-manager and using
ifconfig + route + /etc/resolv.conf.
Output:
guy@golem4:~$ dhclient
Segmentation fault (core dumped)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+subscriptions
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[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
The workaround was certainly helpful, but is there a more elegant solution? I had similar apparmor problem with cupsd (bug 1706052), which I worked around using the solution here, which eventually led to a fix via editing the cups apparmor profile. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
If you are using network-manager, remove the following modules from the enforcing mode should allow automatic DHCP from network-manager: /usr/lib/NetworkManager/nm-dhcp-client.action /usr/lib/NetworkManager/nm-dhcp-helper -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Inspection of the core dump and some testing proves the Segmentation fault error is caused by denied permission to read /proc/self/cmdline. Moving the executable anywhere else the problem would simply disappear. Further inspection pointed the cause to be apparmor denied the open file call, thus, the obvious workaround is remove /sbin/dhclient's apparmor from enforcing mode: sudo apt install apparmor-utils sudo aa-complain /sbin/dhclient This would allow the dhclient to run without error. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Workaround provided does not seem to work for me. It seems the dhclient binary only fails with Seg fault when it is at /sbin/dhclient, when it is moved to /usr/sbin/dhclient it works fine from command line. But this made nm-dhclient-helper to fail. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: isc-dhcp (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: Confirmed Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
[Touch-packages] [Bug 1696499] Re: dhclient segfaults on ubuntu 17.04
Current workaround: Compile and build from here: http://www.linuxfromscratch.org/blfs/view/cvs/basicnet/dhcp.html Note you need the patch dhcp-4.3.5-client_script-1.patch from the same page Also run: mv -v /usr/sbin/dhclient /sbin && install -v -m755 client/scripts/linux /sbin/dhclient-script -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1696499 Title: dhclient segfaults on ubuntu 17.04 Status in isc-dhcp package in Ubuntu: New Bug description: After upgrading, network-manager stopped running DHCP, after trying to run dhclient myself I found out it segfaults. Attached is its strace output. I can connect to the internet by stopping network-manager and using ifconfig + route + /etc/resolv.conf. Output: guy@golem4:~$ dhclient Segmentation fault (core dumped) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1696499/+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
