Bug 1995196 - resolv_wrapper: seems broken with Kerberos URIs
Summary: resolv_wrapper: seems broken with Kerberos URIs
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: resolv_wrapper
Version: 36
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Andreas Schneider
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 1993463 2151513
TreeView+ depends on / blocked
 
Reported: 2021-08-18 15:46 UTC by Robbie Harwood
Modified: 2023-05-25 15:38 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2023-05-25 15:38:13 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)
reproducer (sets up and runs C code) (1.49 KB, application/x-shellscript)
2021-08-18 15:46 UTC, Robbie Harwood
no flags Details

Description Robbie Harwood 2021-08-18 15:46:10 UTC
Created attachment 1815270 [details]
reproducer (sets up and runs C code)

krb5 uses resolv_wrapper for testing our DNS discovery.  I've simplified the test into a reproducer that doesn't rely on any krb5 code, just resolv_wrapper and system libraries.  For clarity, a failing run produces "res_nsearch failed: -1" while a successful run produces "Success with length 701".

Working on fc34:
glibc-2.33-20.fc34.x86_64
resolv_wrapper-1.1.7-1.fc34.x86_64

Broken on rawhide:
glibc-2.34-1.fc35.x86_64
resolv_wrapper-1.1.7-2.fc35.x86_64

(My reproducer is attached.  It needs a C compiler and resolv_wrapper installed to work.)

Comment 1 Andreas Schneider 2021-08-19 10:51:51 UTC
As a first step I implemented a new test in resolv_wrapper:

https://gitlab.com/cwrap/resolv_wrapper/-/merge_requests/7

Comment 2 Andreas Schneider 2021-08-19 12:58:39 UTC
Strange, the test I added works on rawhide, but another test fails now: https://kojipkgs.fedoraproject.org//work/tasks/6879/74136879/build.log

Comment 3 Andreas Schneider 2021-08-19 18:02:28 UTC
podman run --network=host -ti registry.fedoraproject.org/fedora:rawhide /bin/bash

[root@krikkit ~]# rpm -q resolv_wrapper
resolv_wrapper-1.1.7-2.fc35.x86_64
[root@krikkit ~]# bash driver.sh 
res_nsearch failed: -1

cd /resolv_wrapper/obj/
[root@krikkit obj]# make install
...

[root@krikkit ~]# bash driver.sh 
Success with length 701

I guess resolv_wrapper just need to be recompiled against a newer glibc version.

Comment 4 Andreas Schneider 2021-08-19 18:17:08 UTC
The problem is another test is failing, so the rebuild needs to wait till I have found that issue ...

Comment 5 Ben Cotton 2022-02-08 21:43:57 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 36 development cycle.
Changing version to 36.

Comment 6 Andreas Schneider 2022-12-20 15:04:17 UTC
Does this bug still exist? How can I reproduce it?

Comment 7 Andreas Schneider 2022-12-20 15:48:33 UTC
The test I wrote works just fine: https://gitlab.com/cwrap/resolv_wrapper/-/commit/9172ea46b69655603e8db97fc6f1cdffdde03da0

Comment 8 Julien Rische 2022-12-20 17:24:03 UTC
I think that, in krb5's case, you fixed it with https://src.fedoraproject.org/rpms/krb5/pull-request/18

Comment 9 Ben Cotton 2023-04-25 16:43:45 UTC
This message is a reminder that Fedora Linux 36 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 36 on 2023-05-16.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '36'.

Package Maintainer: If you wish for this bug to remain open because you
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Click the "Show advanced fields" button if you do not see it.

Thank you for reporting this issue and we are sorry that we were not 
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to see this bug fixed and are able to reproduce it against a later version 
of Fedora Linux, you are encouraged to change the 'version' to a later version
prior to this bug being closed.

Comment 10 Ludek Smid 2023-05-25 15:38:13 UTC
Fedora Linux 36 entered end-of-life (EOL) status on 2023-05-16.

Fedora Linux 36 is no longer maintained, which means that it
will not receive any further security or bug fix updates. As a result we
are closing this bug.

If you can reproduce this bug against a currently maintained version of Fedora Linux
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