NetBSD Problem Report #32319

From lloyd@must-have-coffee.gen.nz  Fri Dec 16 22:32:13 2005
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Date: Sat, 17 Dec 2005 11:32:08 +1300
From: Lloyd Parkes <lloyd@must-have-coffee.gen.nz>
Reply-To:
To: gnats-bugs@netbsd.org
Subject: free() problem in login with Kerberos

>Number:         32319
>Category:       bin
>Synopsis:       free() problem in login with Kerberos
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 16 22:35:00 +0000 2005
>Closed-Date:    Tue Jun 19 21:21:23 +0000 2018
>Last-Modified:  Tue Jun 19 21:21:23 +0000 2018
>Originator:     Lloyd Parkes
>Release:        NetBSD 3.0_RC6 (from 200512090458Z)
>Organization:
 Must Have Coffee
>Environment:
 System: NetBSD thallid 3.0_RC6 NetBSD 3.0_RC6 (GENERIC) #0: Fri Dec 9 09:39:00 UTC 2005 
 riz@faith.netbsd.org:/home/builds/ab/netbsd-3-0-RC6/i386/200512090458Z-obj/home/builds/ab/netbsd-3-0-RC6/src/sys/arch/i386/compile/GENERIC i386
 Architecture: i386
 Machine: i386
>Description:

 There appears to be a double free in login(1). If I have an /etc/krb5.conf
 file, then login prints out "login in free(): warning: chunk is already 
 free."
 after I type in my user name.

 This doesn't seem to affect my ability to login.

 I create a dummy krb5.conf file because that's how I switched on Kerberos
 in NetBSD 2. I haven't looked too closely at PAM support for Kerberos in
 NetBSD 3 yet. It could easily be that I'm not enabling Kerberos correctly,
 but that shouldn't make login(1) double free memory.

>How-To-Repeat:

 Do a fresh install from CD. I installed everything. Set a hostname and
 set dhclient=YES in rc.conf. This might not be required, but I have it set.
 Run the command 'echo "[libdefaults]" > /etc/krb5.conf' to create an empty
 config file.

 Now log out and log back in.

         login: lloyd
         login in free(): warning: chunk is already free.

 Now log out and log back in.

         login: lloyd
         login in free(): warning: chunk is already free.
         Password:
         Last login: Sun Dec 18 00:18:06 2005 from 
 gamer.must-have-coffee.gen.nz
 on ttyp0
         Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 
 2004, 2005
             The NetBSD Foundation, Inc.  All rights reserved.
         Copyright (c) 1982, 1986, 1989, 1991, 1993
             The Regents of the University of California.  All rights 
 reserved.

         NetBSD 3.0_RC6 (GENERIC) #0: Fri Dec 9 09:39:00 UTC 2005

         Welcome to NetBSD!

         ...

>Fix:

         Not known.



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>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: gnats-admin->bin-bug-people
Responsible-Changed-By: spz@netbsd.org
Responsible-Changed-When: Wed, 27 Sep 2006 18:23:54 +0000
Responsible-Changed-Why:
ancient 'pending' PR dug out and fixed up


State-Changed-From-To: open->closed
State-Changed-By: kamil@NetBSD.org
State-Changed-When: Tue, 19 Jun 2018 23:21:23 +0200
State-Changed-Why:
The original problem is no longer reproducible on 8.99.19 running with MKSANITZIER=yes USE_SANITIZER=address.


>Unformatted:

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