Bug 1320599 - glibc: NULL pointer dereference in stub resolver with unconnectable name server addresses
Summary: glibc: NULL pointer dereference in stub resolver with unconnectable name serv...
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: glibc
Version: 6.8
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: glibc team
QA Contact: qe-baseos-tools-bugs
URL:
Whiteboard:
Depends On: 1316972
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-03-23 15:27 UTC by Florian Weimer
Modified: 2017-11-08 10:16 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1316972
Environment:
Last Closed: 2017-11-08 10:16:18 UTC
Target Upstream Version:

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System ID Private Priority Status Summary Last Updated
Sourceware 19791 0 None None None 2016-03-23 15:27:41 UTC
Sourceware 19825 0 None None None 2016-03-23 15:27:41 UTC
Sourceware 19830 0 None None None 2016-03-23 15:27:41 UTC
Sourceware 19831 0 None None None 2016-03-23 15:27:41 UTC

Description Florian Weimer 2016-03-23 15:27:42 UTC 
+++ This bug was initially created as a clone of Bug #1316972 +++

If /etc/resolv.conf contains addresses which cause the connect system call to fail immediately, queries which trigger search along the search path result in a segmentation fault.

A workaround is to remove the problematic addresses from /etc/resolv.conf.

--- Additional comment from Florian Weimer on 2016-03-23 16:22:08 CET ---

swbz#19825 is a very similar bug in send_vc/TCP (the original bug is about send_dg/UDP), so far only observed under valgrind.

swbz#19831 and swbz#19830 should be backported as well, to get cleaner test suite runs.
Comment 3 Carlos O'Donell 2016-10-25 12:28:04 UTC 
This bug did not make the rhel-6.9 release but will be reconsidered for rhel-6.10.
Comment 7 Florian Weimer 2017-11-08 10:16:13 UTC 
Red Hat Enterprise Linux 6 transitioned to the Production 3 Phase on May 10,
2017.  During the Production 3 Phase, Critical impact Security Advisories
(RHSAs) and selected Urgent Priority Bug Fix Advisories (RHBAs) may be released
as they become available.

This issue does not qualify, but it was addressed in Red Hat Enterprise Linux 7 as bug 1320596.
Comment 8 Red Hat Bugzilla Rules Engine 2017-11-08 10:16:18 UTC 
Development Management has reviewed and declined this request. You may appeal this decision by reopening this request.
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