Bug 147003 - [RHEL3] telnetd cleanup() race condition with syslog in signal handler
[RHEL3] telnetd cleanup() race condition with syslog in signal handler
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: telnet (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Harald Hoyer
Ben Levenson
Depends On:
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Reported: 2005-02-03 11:29 EST by David Lehman
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2005-03-28 14:49:18 EST
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RHEL 7.3 requirements from Atomic Host:
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Description David Lehman 2005-02-03 11:29:35 EST
*** 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):


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@us.ibm.com , 
which fixed the issue.
Comment 1 Josh Bressers 2005-03-28 14:49:18 EST
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.


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