Bug 729045 - Debug file missing in debuginfo package for a binary
Debug file missing in debuginfo package for a binary
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: nmap (Show other bugs)
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: Michal Hlavinka
Patrik Kis
Depends On:
Blocks: 727919
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Reported: 2011-08-08 11:20 EDT by Karel Klíč
Modified: 2014-01-30 04:21 EST (History)
4 users (show)

See Also:
Fixed In Version: nmap-5.51-3.el6
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-05-30 11:49:09 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Karel Klíč 2011-08-08 11:20:59 EDT
A problem related to debuginfo was found in the nmap-5.21-4.el6 package. This issue might affect crash analysis done by Automatic Bug Reporting Tool and its retrace server, and also prevent proper debugging of crashes via GDB.

A debuginfo file for a binary is not present in the debuginfo package. This might be caused by:
 - binary being compiled without debugging information
 - debugging information being removed from the binary by a build script
 - rpmbuild failing to extract debugging information from a binary in a buildroot because of permissions (eg. suid binaries, binaries without executable flag set)

affected binary: /usr/bin/ncat
affected package: nmap-5.21-4.el6.i686
binary doesn't contain debug sections (it was probably stripped)
affected binary file mode: 100755

This issue can be investigated by using eu-readelf tool from the elfutils package. Use `eu-readelf --notes /path/to/binary` to get build ID of a binary. Then check that the debuginfo package does not contain /usr/lib/debug/.build-id/<aa>/<bbbbbbbb>, where <aa> are the first two chars of the build ID, and <bbbbbbbb> is the rest of it. It should be a symlink pointing back to the binary.

(This bug was detected and filed by a script.)
Comment 2 RHEL Product and Program Management 2011-08-08 11:41:56 EDT
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. 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. If you would like it considered as an
exception in the current release, please ask your support
Comment 7 Michal Hlavinka 2012-06-05 07:12:31 EDT
When working on bug #826601, I found that debuginfo subpackage now contains 
$ file /usr/lib/debug/usr/bin/ncat.debug 

/usr/lib/debug/usr/bin/ncat.debug: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=0xc2eca09088e295c06268a3fe8b1f450aba030c81, not stripped

but gdb still does not work:
warning: "/usr/lib/debug/usr/bin/ncat.debug": separate debug info file has no debug info

So, this bug has some improvement, but it's still not fixed.
Comment 10 Michal Hlavinka 2012-06-05 08:26:05 EDT
simple fix is to use
make STRIP=true
so 'strip' is replaced by 'true' command. It's verified on Fedora
Comment 17 errata-xmlrpc 2013-05-30 11:49:09 EDT
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.


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