CRC mismatch in debug symbols

[Jan J]

While trying to triage Ubuntu Bug #921489 I run into some problems with debug symbols.

GDB prints

Reading symbols from /usr/lib/libgssapi_krb5.so.2...
warning: the debug information found in "/usr/lib/debug//usr/lib/libgssapi_krb5.so.2.2" does not match "/usr/lib/libgssapi_krb5.so.2" (CRC mismatch).

warning: the debug information found in "/usr/lib/debug/usr/lib/libgssapi_krb5.so.2.2" does not match "/usr/lib/libgssapi_krb5.so.2" (CRC mismatch).

(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libgssapi_krb5.so.2

Reading symbols from /usr/lib/libkrb5.so.3...
warning: the debug information found in "/usr/lib/debug//usr/lib/libkrb5.so.3.3" does not match "/usr/lib/libkrb5.so.3" (CRC mismatch).

warning: the debug information found in "/usr/lib/debug/usr/lib/libkrb5.so.3.3" does not match "/usr/lib/libkrb5.so.3" (CRC mismatch).

(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5.so.3

Reading symbols from /usr/lib/libkrb5support.so.0...
warning: the debug information found in "/usr/lib/debug//usr/lib/libkrb5support.so.0.1" does not match "/usr/lib/libkrb5support.so.0" (CRC mismatch).

warning: the debug information found in "/usr/lib/debug/usr/lib/libkrb5support.so.0.1" does not match "/usr/lib/libkrb5support.so.0" (CRC mismatch).

(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libkrb5support.so.0

ProblemType: Bug
Architecture: amd64
Date: Wed Jan 25 11:36:29 2012
Dependencies:
 coreutils 7.4-2ubuntu3
 debconf 1.5.28ubuntu4
 debconf-i18n 1.5.28ubuntu4
 dpkg 1.15.5.6ubuntu4.5 [modified: sbin/start-stop-daemon]
 findutils 4.4.2-1ubuntu1
 gcc-4.4-base 4.4.3-4ubuntu5
 libacl1 2.2.49-2
 libattr1 1:2.4.44-1
 libc-bin 2.11.1-0ubuntu7.8
 libc6 2.11.1-0ubuntu7.8
 libcomerr2 1.41.11-1ubuntu2.1
 libgcc1 1:4.4.3-4ubuntu5
 libk5crypto3 1.8.1+dfsg-2ubuntu0.10
 libkeyutils1 1.2-12
 libkrb5-3 1.8.1+dfsg-2ubuntu0.10
 libkrb5support0 1.8.1+dfsg-2ubuntu0.10
 liblocale-gettext-perl 1.05-6
 libselinux1 2.0.89-4
 libstdc++6 4.4.3-4ubuntu5
 libtext-charwidth-perl 0.04-6
 libtext-iconv-perl 1.7-2
 libtext-wrapi18n-perl 0.06-7
 lzma 4.43-14ubuntu2
 perl-base 5.10.1-8ubuntu2.1
 tzdata 2011n-0ubuntu0.10.04
DistroRelease: Ubuntu 10.04
NonfreeKernelModules: openafs
Package: libkrb5-dbg 1.8.1+dfsg-2ubuntu0.10
PackageArchitecture: amd64
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 LC_CTYPE=en_GB.UTF-8
ProcVersionSignature: Ubuntu 2.6.32-37.81-generic 2.6.32.49+drm33.21
SourcePackage: krb5
Tags: lucid
Uname: Linux 2.6.32-37-generic x86_64

[Sam Hartman (hartmans)]

I suspect that you have a version of libgssapi-krb5-2 different than
libkrb5-dbg
can you try
aptitude reinstall libgssapi-krb5-2 libkrb5-dbg and see if the messages
change?

 status incomplete
 importance low

[Jan J (jan.j)]

# aptitude reinstall libgssapi-krb5-2 libkrb5-dbg
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initialising package states... Done
Writing extended state information... Done
The following packages will be REINSTALLED:
  libgssapi-krb5-2 libkrb5-dbg
The following packages will be REMOVED:
  linux-headers-2.6.32-37{u} linux-headers-2.6.32-37-generic{u}
0 packages upgraded, 0 newly installed, 2 reinstalled, 2 to remove and 3 not upgraded.
Need to get 129kB/1,756kB of archives. After unpacking 85.5MB will be freed.
Do you want to continue? [Y/n/?]
Writing extended state information... Done
Get:1 http://linux-sua.it.su.se/lucid/ubuntu/ lucid-updates/main libgssapi-krb5-2 1.8.1+dfsg-2ubuntu0.10
[129kB]
Fetched 129kB in 0s (1,544kB/s)
(Reading database ... 79386 files and directories currently installed.)
Removing linux-headers-2.6.32-37-generic ...
Removing linux-headers-2.6.32-37 ...
(Reading database ... 61212 files and directories currently installed.)
Preparing to replace libgssapi-krb5-2 1.8.1+dfsg-2ubuntu0.10 (using .../libgssapi-krb5-2_1.8.1+dfsg-2ubun
tu0.10_amd64.deb) ...
Unpacking replacement libgssapi-krb5-2 ...
Preparing to replace libkrb5-dbg 1.8.1+dfsg-2ubuntu0.10 (using .../libkrb5-dbg_1.8.1+dfsg-2ubuntu0.10_amd
64.deb) ...
Unpacking replacement libkrb5-dbg ...
Setting up libgssapi-krb5-2 (1.8.1+dfsg-2ubuntu0.10) ...

Setting up libkrb5-dbg (1.8.1+dfsg-2ubuntu0.10) ...
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initialising package states... Done
Writing extended state information... Done

No change in message.

I think you might want to look at https://bugs.launchpad.net/ubuntu/+source/openafs/+bug/660360

[Sam Hartman (hartmans)]

OK, setting your status back to new.
I don't have permission to propose an upload to lucid to fix this.

 status new

[Steve Langasek (vorlon)]

> libgssapi-krb5-2 1.8.1+dfsg-2ubuntu0.10

This package version is a security update that was published in October of last year. The bug with openafs, bug #660360, was apparently resolved in *February* of last year, which means the security update should have been built already using the fixed version of pkg-create-dbgsym; and in any event, pkg-create-dbgsym was last updated in lucid in April 2010, right after the 10.04 release.

So I don't think it's clear that this is the same bug, or that a no-change rebuild of krb5 will fix it as it did for openafs. Jan, have you tried a local rebuild, with or without pkg-create-dbgsym and pkgbinarymangler installed?

[Steve Langasek (vorlon)]

I see no such error with the packages in precise.

[Jan J (jan.j)]

I followed http://www.cyberciti.biz/faq/rebuilding-ubuntu-debian-linux-binary-package/

then I did

dpkg -i *.deb

-rw-r--r-- 1 root root 213784 2012-01-26 10:40 /usr/lib/libgssapi_krb5.so.2.2
-rw-r--r-- 1 root root 1214599 2012-01-26 10:40 /usr/lib/debug/usr/lib/libgssapi_krb5.so.2.2

should indicate that the new files are in place.

The messages still remains in GDB.

[Steve Langasek (vorlon)]

Ok, this certainly indicates that something else is going on here. I have no idea what, unfortunately.

[Rolf Leggewie (r0lf)]

lucid has seen the end of its life and is no longer receiving any updates. Marking the lucid task for this ticket as "Won't Fix".