Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

For bugs related to Red Hat Enterprise Linux 3 product line. The current stable release is 3.9. For Red Hat Enterprise Linux 6 and above, please visit Red Hat JIRA https://issues.redhat.com/secure/CreateIssue!default.jspa?pid=12332745 to report new issues.

Bug 147003

Summary:	[RHEL3] telnetd cleanup() race condition with syslog in signal handler
Product:	Red Hat Enterprise Linux 3	Reporter:	David Lehman <dlehman>
Component:	telnet	Assignee:	Harald Hoyer <harald>
Status:	CLOSED ERRATA	QA Contact:	Ben Levenson <benl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.0	CC:	tao
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-03-28 19:49:18 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:

Description David Lehman 2005-02-03 16:29:35 UTC

*** This bug has been split off bug 145004 ***

------- Original comment by Jason Vas Dias on 2005.01.13 12:03 -------

Description of problem:
Telnetd can enter the logout(3) call in cleanup() 
via a signal handler, when the main program also
enters logout in cleanup(), resulting in self 
deadlock as the wtmp_lock is already held by
the process - see bug #143929 . 

Version-Release number of selected component (if applicable):

telnet-server-0.17-26

How reproducible:

If cleanup entered by main program when SIGCHLD handler
also in cleanup / logout, 100% .

Steps to Reproduce:
See bug #143929
  



Expected results:

telnetd should not be able to self-deadlock

Additional info:

See attached patch, contributed by  dlstevens.com , 
which fixed the issue.

Comment 1 Josh Bressers 2005-03-28 19:49:18 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-327.html