I ran the test case in a focal LXC container (on jammy host) and /var/lib/apport/coredump/core._usr_bin_sleep.* was created correctly.
** Tags removed: verification-needed verification-needed-focal ** Tags added: verification-done verification-done-focal -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apport in Ubuntu. https://bugs.launchpad.net/bugs/1982555 Title: core dump file empty inside container Status in Apport: Fix Released Status in apport package in Ubuntu: Fix Released Status in apport source package in Focal: Fix Committed Status in apport source package in Jammy: Fix Committed Bug description: [Impact] Apport will write an empty core dump file inside of containers. [Test plan] Run following testcase script inside a LXC container: ``` rm -f /var/lib/apport/coredump/* ulimit -c 1000000 sleep 86400 & killall -3 sleep ``` Apport will write a core dump into /var/lib/apport/coredump, but this core dump is empty: ``` $ stat /var/lib/apport/coredump/core._usr_bin_sleep.* File: /var/lib/apport/coredump/core._usr_bin_sleep.0.44f483a1-e487-44b3-88d1-805d1026f31d.9059.34839819 Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: fd00h/64768d Inode: 120848663 Links: 1 Access: (0400/-r--------) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2022-07-22 07:54:48.838682067 +0000 Modify: 2022-07-22 07:54:48.838682067 +0000 Change: 2022-07-22 07:54:48.838682067 +0000 Birth: 2022-07-22 07:54:48.838682067 +0000 ``` This file should not be empty. [Where problems could occur] The apport binary is called by the kernel when a process crashes. Worst case scenarios include breaking the apport binary and no problem report is generated any more (or apport uses too much resources). Users will see problems reports inside the container which cause additional load or disk usage. The fix is accompanied by a test case. [Other Info] The autopkgtest for armhf are run inside a LXC container and the test case test_core_dump_packaged_sigquit triggers this bug. Due to the huge amount of broken autopkgtest tests, the diff for the SRUs are bigger than desired. The individual commits in https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/apport/ are probably easier to review. * jammy SRU: https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/apport/log/?h=1fa042cc27714c407494b3d6dfd0730bb984f3eb * focal SRU: https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/apport/log/?h=eaa92037c7dfba621719c6f81fd75f6a09e90881 To manage notifications about this bug go to: https://bugs.launchpad.net/apport/+bug/1982555/+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
