Ubuntu
openafs package

openafs debug information CRC mismatch

Bug #660360 reported by Linus Widströmer
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
openafs (Ubuntu)
Fix Released
Undecided
Unassigned
Lucid
Fix Released
Undecided
Unassigned
pkg-create-dbgsym (Ubuntu)
Fix Released
Undecided
Martin Pitt
Lucid
Fix Released
Undecided
Unassigned

Bug Description

Binary package hint: openafs-dbg

We have successfully been using the debug symbols from openafs-dbg when debugging our Hardy fileservers. We are currently in the need of doing debugging of our lucid fileservers but it seems that the openafs-dbg package on lucid is broken.

> Description: Ubuntu 10.04.1 LTS
> Release: 10.04
>
> openafs-dbg:
> Installed: 1.4.12+dfsg-3
> Candidate: 1.4.12+dfsg-3

How to reproduce:
1) Install the debug package openafs-dbg
2) Run: gdb /usr/lib/openafs/fileserver

Instead of actually loading the debug symbols as expected the following message is printed:
> Reading symbols from /usr/lib/openafs/fileserver...
> warning: the debug information found in "/usr/lib/debug//usr/lib/openafs/fileserver" does
> not match "/usr/lib/openafs/fileserver" (CRC mismatch).
>
> warning: the debug information found in "/usr/lib/debug/usr/lib/openafs/fileserver" does
> not match "/usr/lib/openafs/fileserver" (CRC mismatch).
> (no debugging symbols found)...done.
and consequently no debugging symbols are available for the debugger.

After searching LauncPad for similar problems I found among others https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/584477 which seems similar. It references https://bugs.launchpad.net/ubuntu/+source/pkg-create-dbgsym/+bug/566602 which suggests that the problem has been fixed and that it would be sufficent to do a rebuild of openafs to reenable a working debugging package.

Not having the possibility to attach a debugger and get symbols for openafs makes debugging afs tricky.

Revision history for this message
Russ Allbery (rra-debian) wrote :

For those triaging or looking at this bug, just wanted to note that I believe this is fallout from Ubuntu's handling of debug symbols, which has diverged from Debian. I don't believe this is an issue in the packages from the Debian perspective. I am happy to modify the package so that it will work properly with Ubuntu if this doesn't break anything for Debian, but I don't know enough about how the Ubuntu debug generation works to be able to come up with such a patch myself. (This is assuming that a simple rebuild doesn't fix it, which it might for all I know.)

Evan Broder (broder)
Changed in pkg-create-dbgsym (Ubuntu):
assignee: nobody → Martin Pitt (pitti)
Revision history for this message
Martin Pitt (pitti) wrote :

I just checked openafs-dbg on current natty, and it seems to be intact, so I'm closing this for natty and add a Lucid task instead.

Changed in pkg-create-dbgsym (Ubuntu):
status: New → Fix Released
Changed in openafs (Ubuntu):
status: New → Incomplete
status: Incomplete → Fix Released
Revision history for this message
Martin Pitt (pitti) wrote :

I confirm that a simple rebuild fixes this, so pkg-create-dbgsym was already fixed in lucid.

Changed in pkg-create-dbgsym (Ubuntu Lucid):
status: New → Fix Released
Revision history for this message
Martin Pitt (pitti) wrote :

I uploaded a no-change rebuild to lucid-proposed. Description already has the test case, and there is no source diff.

Changed in openafs (Ubuntu Lucid):
status: New → Fix Committed
tags: added: verification-needed
Revision history for this message
Martin Pitt (pitti) wrote : Please test proposed package

Accepted openafs into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Revision history for this message
Anders Kaseorg (andersk) wrote :

The version of openafs needs to be bumped from 1.4.12+dfsg-3 to 1.4.12+dfsg-3+build1, not just 1.4.12+dfsg-3build1. The problem is that openafs-modules-source generates a package openafs-modules-$(uname -r) with version 1.4.12+dfsg-3build1+2.6.32-28.55, and dpkg sorts version numbers as follows:

  1.4.12+dfsg-3build1+2.6.32-28.55 <
  1.4.12+dfsg-3+2.6.32-28.55 <
  1.4.12+dfsg-3+build1+2.6.32-28.55

Revision history for this message
Pedro Villavicencio (pedro) wrote :

I've verified the package, the symbols are there with the proposed version, marking this as verification-done, thanks all.

tags: added: verification-done
removed: verification-needed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package openafs - 1.4.12+dfsg-3build1

---------------
openafs (1.4.12+dfsg-3build1) lucid-proposed; urgency=low

  * No-change rebuild against current pkg-create-dbgsym to fix broken debug
    symbol linking. (LP: #660360)
 -- Martin Pitt <email address hidden> Wed, 09 Feb 2011 15:12:55 +0100

Changed in openafs (Ubuntu Lucid):
status: Fix Committed → Fix Released
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