Bug 727872

Summary:	find-debuginfo.sh should handle identical binaries via additional symlinks
Product:	Red Hat Enterprise Linux 6	Reporter:	Karel Klíč <kklic>
Component:	rpm	Assignee:	Panu Matilainen <pmatilai>
Status:	CLOSED ERRATA	QA Contact:	Patrik Kis <pkis>
Severity:	low	Docs Contact:
Priority:	medium
Version:	6.2	CC:	ffesti, pkis, rvokal
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	836966 (view as bug list)		Environment:
Last Closed:	2013-02-21 10:50:55 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	728996, 729012, 729022, 729038, 836966

Description Karel Klíč 2011-08-03 13:48:50 UTC

Description of problem:
find-debuginfo.sh that is present in rpm-4.8.0-16.el6 does not handle several binaries with the same build id well. The symbolic link pointing from debuginfo back to the binary (/usr/lib/debug/.build-id/<aa>/<bbbbb>) points to only one of the identical binaries.

In this situation it is not possible to get the list of all packages required to analyze a coredump from the coredump itself. Coredumps contain build-ids, but debuginfo packages cannot be used to get the binaries (paths) that can be turned into packages (for example, when a package containing the symlink target is not available in a RHEL variant). This lowers the success rate of ABRT's retrace server, which is being used to analyze coredumps from customers.

The fix for this is already present in Fedora. find-debuginfo.sh in Fedora creates additional .2, .3,... symlinks to handle additional instances of binary with a build-id.

Please consider backporting the Fedora extension/fix to RHEL-6.

Steps to Reproduce:
1. Crash /bin/perl from perl-5.10.1-119.el6.i686, get a coredump.
2. Coredump contains build-id f848b9e8ff059b14becc9acb6dfaf49d5e5052b0
3. /usr/lib/debug/.build-id/f8/48b9e8ff059b14becc9acb6dfaf49d5e5052b0 points to /usr/bin/suidperl, which is not available.

Expected results:
/usr/lib/debug/.build-id/f8/48b9e8ff059b14becc9acb6dfaf49d5e5052b0 points to /usr/bin/suidperl

/usr/lib/debug/.build-id/f8/48b9e8ff059b14becc9acb6dfaf49d5e5052b0.2 points to /bin/perl

Comment 2 RHEL Program Management 2011-10-07 16:04:47 UTC

Since RHEL 6.2 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.

Comment 3 Panu Matilainen 2012-07-02 08:30:17 UTC

devel_ack for the rpm side, but gdb needs to be patched to support this as well.

Comment 12 errata-xmlrpc 2013-02-21 10:50:55 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0461.html