Ubuntu
dpkg package

dpkg froze with InfiniteLoop in unpack()

Bug #632077 reported by Kenny Strawn
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
dpkg (Ubuntu)
Incomplete
Low
Unassigned

Bug Description

Binary package hint: dpkg

Attached is a screenshot of Synaptic at this dpkg hang: Upon upgrading the packages, as soon as Synaptic/APT/dpkg starts unpacking the .deb archives, dpkg hangs, WITHOUT CONSUMING ANY CPU!!! This is definitely something an infinite loop would do.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: dpkg 1.15.8.4ubuntu2
ProcVersionSignature: Ubuntu 2.6.35-19.28-generic 2.6.35.3
Uname: Linux 2.6.35-19-generic i686
Architecture: i386
Date: Mon Sep 6 18:03:35 2010
LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Beta i386 (20100901.1)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: dpkg

See original description
Revision history for this message
Kenny Strawn (realkstrawn93) wrote :
Kenny Strawn (realkstrawn93)
Changed in apt (Ubuntu):
assignee: nobody → ks64 (mango-k)
Revision history for this message
Kenny Strawn (realkstrawn93) wrote :

This is a dpkg bug, not an APT bug.

affects: apt (Ubuntu) → dpkg (Ubuntu)
Changed in dpkg (Ubuntu):
assignee: ks64 (mango-k) → nobody
Revision history for this message
Kenny Strawn (realkstrawn93) wrote :

As an update to what C-de-Avillez posted on the bug marked as a duplicate of this one, as you can see in the screenshot, it's every time I try to upgrade my packages that this occurs. I don't know if it's just me or if there actually are others who have this problem.

Kenny Strawn (realkstrawn93)
description: updated
Revision history for this message
C de-Avillez (hggdh2) wrote :

Hi ks64.

This sounds like a wait/hang, *not* as a loop.

Anyway, I would like you to attach here the file /var/log/apt/term.log -- this may give us a bit more of data on what happened when you forcefully cancelled the initial upgrade.

Changed in dpkg (Ubuntu):
importance: Undecided → Low
status: New → Incomplete
Revision history for this message
trojanfoe (trojanfoe) wrote :

I was getting this on my amd64 server until recently - however I always use 'apt-get update; apt-get -y dist-upgrade'.

I have been putting off doing any upgrades to avoid any more lock-ups, but have just successfully performed one, so it might have cleared?

Revision history for this message
Artscoop93 (artscoop93) wrote :

Hi,
I have the same problem since I've upgraded to Maverick. (Linux 2.6.35-22)
The upgrades don't work anymore after the machine has been up for some time, so I can upgrade when I've just powered my laptop on. If I run other applications, do my stuff for a few hours, any upgrade with apt and dpkg will hang while unpacking.
When this occurs, the dpkg process hangs in an uninterruptible state in the iterate_supers channel.
At this point, it is impossible to reboot the machine unless you make a hard reboot.

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