=========== bionic OK (1.6.1 -> 1.6.2) =====================
+ lxc launch -e ubuntu:bionic lp1778547-bionic
Creating lp1778547-bionic
Starting lp1778547-bionic
+ sleep 5
+ lxc exec lp1778547-bionic -- sh -c 'apt-cache policy libapt-pkg5.0 | grep
Inst ; python3 /home/jak/a.py'
Installed: 1.6.1
[('0', '/dev/pts/5'), ('1', '/dev/pts/5'), ('2', '/dev/pts/5'), ('3',
'pipe:[749881]'), ('4', '/var/lib/dpkg/lock'), ('5', '/var/lib/dpkg/lock'),
('6', '<deleted>'), ('17', 'socket:[43872]')]
[('0', '/dev/pts/5'), ('1', '/dev/pts/5'), ('2', '/dev/pts/5'), ('3',
'pipe:[749881]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[43872]')]
+ lxc exec lp1778547-bionic -- sh -c 'echo deb http://archive.ubuntu.com/ubuntu
bionic-proposed main >> /etc/apt/sources.list && apt-get update && apt-get -qy
install libapt-pkg5.0'
dpkg-preconfigure: unable to re-open stdin: No such file or directory
+ lxc exec lp1778547-bionic -- sh -c 'apt-cache policy libapt-pkg5.0 | grep
Inst ; python3 /home/jak/a.py'
Installed: 1.6.2
[('0', '/dev/pts/4'), ('1', '/dev/pts/4'), ('2', '/dev/pts/4'), ('3',
'pipe:[779703]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[43872]')]
[('0', '/dev/pts/4'), ('1', '/dev/pts/4'), ('2', '/dev/pts/4'), ('3',
'pipe:[779703]'), ('4', '<deleted>'), ('17', 'socket:[43872]')]
+ lxc stop lp1778547-bionic
==================== artful OK (1.5.1 -> 1.5.2) ===============================
+ lxc launch -e ubuntu:artful lp1778547-artful
Creating lp1778547-artful
Starting lp1778547-artful
+ sleep 5
+ lxc exec lp1778547-artful -- sh -c 'apt-cache policy libapt-pkg5.0 | grep
Inst ; python3 /home/jak/a.py'
Installed: 1.5.1
[('0', '/dev/pts/4'), ('1', '/dev/pts/4'), ('2', '/dev/pts/4'), ('3',
'pipe:[818873]'), ('4', '/var/lib/dpkg/lock'), ('5', '/var/lib/dpkg/lock'),
('6', '<deleted>'), ('17', 'socket:[43872]')]
[('0', '/dev/pts/4'), ('1', '/dev/pts/4'), ('2', '/dev/pts/4'), ('3',
'pipe:[818873]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[43872]')]
+ lxc exec lp1778547-artful -- sh -c 'echo deb http://archive.ubuntu.com/ubuntu
artful-proposed main >> /etc/apt/sources.list && apt-get update && apt-cache
policy libapt-pkg5.0 && apt-get -y install libapt-pkg5.0'
dpkg-preconfigure: unable to re-open stdin: No such file or directory
+ lxc exec lp1778547-artful -- sh -c 'apt-cache policy libapt-pkg5.0 | grep
Inst ; python3 /home/jak/a.py'
Installed: 1.5.2
[('0', '/dev/pts/4'), ('1', '/dev/pts/4'), ('2', '/dev/pts/4'), ('3',
'pipe:[826053]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[43872]')]
[('0', '/dev/pts/4'), ('1', '/dev/pts/4'), ('2', '/dev/pts/4'), ('3',
'pipe:[826053]'), ('4', '<deleted>'), ('17', 'socket:[43872]')]
====== xenial OK (1.2.26->1.2.27) =====================
+ lxc launch -e ubuntu:xenial lp1778547-xenial
Creating lp1778547-xenial
Starting lp1778547-xenial
+ sleep 5
+ lxc exec lp1778547-xenial -- sh -c 'apt-cache policy libapt-pkg5.0 | grep
Inst ; python3 /home/jak/a.py'
Installed: 1.2.26
[('0', '/dev/pts/6'), ('1', '/dev/pts/6'), ('2', '/dev/pts/6'), ('3',
'pipe:[764358]'), ('4', '/var/lib/dpkg/lock'), ('5', '/var/lib/dpkg/lock'),
('6', '<deleted>'), ('17', 'socket:[43872]')]
[('0', '/dev/pts/6'), ('1', '/dev/pts/6'), ('2', '/dev/pts/6'), ('3',
'pipe:[764358]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[43872]')]
+ lxc exec lp1778547-xenial -- sh -c 'echo deb http://archive.ubuntu.com/ubuntu
xenial-proposed main >> /etc/apt/sources.list && apt-get update && apt-get -qy
install libapt-pkg5.0'
dpkg-preconfigure: unable to re-open stdin: No such file or directory
+ lxc exec lp1778547-xenial -- sh -c 'apt-cache policy libapt-pkg5.0 | grep
Inst ; python3 /home/jak/a.py'
Installed: 1.2.27
[('0', '/dev/pts/3'), ('1', '/dev/pts/3'), ('2', '/dev/pts/3'), ('3',
'pipe:[781507]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[43872]')]
[('0', '/dev/pts/3'), ('1', '/dev/pts/3'), ('2', '/dev/pts/3'), ('3',
'pipe:[781507]'), ('4', '<deleted>'), ('17', 'socket:[43872]')]
+ lxc stop lp1778547-xenial
** Tags removed: verification-needed verification-needed-artful
verification-needed-bionic verification-needed-xenial
** Tags added: verification-done verification-done-artful
verification-done-bionic verification-done-xenial
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to apt in Ubuntu.
https://bugs.launchpad.net/bugs/1778547
Title:
Broken system lock counting
Status in apt package in Ubuntu:
Fix Committed
Status in apt source package in Xenial:
Fix Committed
Status in apt source package in Artful:
Fix Committed
Status in apt source package in Bionic:
Fix Committed
Bug description:
[Impact]
System lock unrefing is broken, off-by-one error. Locking twice opens a
second fd for the lock file, and the old fd gets lost and remains open for the
remaining duration of the program
[Test case]
Executing the following script should show one lock file in the first
line, and none in the last line.
def maybe_readlink(path):
try:
return os.readlink(path)
except:
return "<deleted>"
import os, apt_pkg
apt_pkg.init()
apt_pkg.pkgsystem_lock()
apt_pkg.pkgsystem_lock()
print([(p, maybe_readlink("/proc/self/fd/" + p)) for p in
os.listdir("/proc/self/fd")])
apt_pkg.pkgsystem_unlock()
apt_pkg.pkgsystem_unlock()
print([(p, maybe_readlink("/proc/self/fd/" + p)) for p in
os.listdir("/proc/self/fd")])
[Test output]
good, cosmic:
[('0', '/dev/pts/2'), ('1', '/dev/pts/2'), ('2', '/dev/pts/2'), ('3',
'/var/lib/dpkg/lock'), ('4', '<deleted>')]
[('0', '/dev/pts/2'), ('1', '/dev/pts/2'), ('2', '/dev/pts/2'), ('3',
'<deleted>')]
bad, bionic:
[('0', '/dev/pts/0'), ('1', '/dev/pts/0'), ('2', '/dev/pts/0'), ('3',
'pipe:[40889331]'), ('4', '/var/lib/dpkg/lock'), ('5', '/var/lib/dpkg/lock'),
('6', '<deleted>'), ('17', 'socket:[53931]')]
[('0', '/dev/pts/0'), ('1', '/dev/pts/0'), ('2', '/dev/pts/0'), ('3',
'pipe:[40889331]'), ('4', '/var/lib/dpkg/lock'), ('5', '<deleted>'), ('17',
'socket:[53931]')]
[Regression potential]
A locking change can potentially break locking, but this one seems like an
obvious off-by-one error.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1778547/+subscriptions
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