** Also affects: apport
Importance: Undecided
Status: New
** Changed in: apport
Status: New => In Progress
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https://bugs.launchpad.net/bugs/2112272
Title:
Apport refuses to generate core dumps inside containers
Status in Apport:
In Progress
Status in apport package in Ubuntu:
In Progress
Bug description:
lsb_release -rd
Description: Ubuntu 22.04.5 LTS
Release: 22.04
apport:
Installed: 2.20.11-0ubuntu82
Candidate: 2.20.11-0ubuntu82.7
Version table:
2.20.11-0ubuntu82.7 500
500 http://us-west-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/main
amd64 Packages
500 http://security.ubuntu.com/ubuntu jammy-security/main amd64
Packages
*** 2.20.11-0ubuntu82 500
500 http://us-west-1.ec2.archive.ubuntu.com/ubuntu jammy/main amd64
Packages
100 /var/lib/dpkg/status
What happened:
Version 2.20.11-0ubuntu82.7 introduced a new function called
consistency_checks that now refuses to generate core dumps and logging
the message "executable was modified after program start, ignoring."
However, this check fails in container environments because the binary
resides inside container-specific directories, not directly on the
host OS.
"if not os.path.exists(os.readlink('exe', dir_fd=proc_pid_fd))"
As a result, core dumps from containers are being discarded. Prior to
this update, core dumps were generated correctly.
What you expected to happen:
When a process inside the container crashes, the apport running on the
host OS should forward the core dump via a UNIX socket instead of
exiting because the binary is not present on the host OS.
Changes:
https://launchpadlibrarian.net/796123959/apport_2.20.11-0ubuntu82.6_2.20.11-0ubuntu82.7.diff.gz
+process_start = get_process_starttime()
+if not consistency_checks(options, process_start):
+ sys.exit(0)
+
# Check if we received a valid global PID (kernel >= 3.12). If we do,
# then compare it with the local PID. If they don't match, it's an
# indication that the crash originated from another PID namespace.
@@ -540,21 +617,24 @@
if options.global_pid is not None:
consistency_checks should be after checking if the crash originated
from another PID namespace.
To manage notifications about this bug go to:
https://bugs.launchpad.net/apport/+bug/2112272/+subscriptions
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