Subject: pkg/23245: security/stunnel does not terminate
To: None <>
From: Hauke Fath <>
List: netbsd-bugs
Date: 10/23/2003 14:31:01
>Number:         23245
>Category:       pkg
>Synopsis:       security/stunnel does not terminate properly.
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 23 12:32:00 UTC 2003
>Originator:     Hauke Fath <>
>Release:        NetBSD 1.6ZC
           Hauke Fath                   /~\  The ASCII Ribbon Campaign
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System: NetBSD heiligenberg 1.6ZC NetBSD 1.6ZC (HEILIGENBERG) #1: Fri Sep 26 16:51:05 CEST 2003 hf@heiligenberg:/var/obj/netbsd-builds/i386/obj/sys/arch/i386/compile/HEILIGENBERG i386
Architecture: i386
Machine: i386

I see the same thing on a NetBSD/sparc 1.6.1 machine.

[hf@heiligenberg] ~ # stunnel -version
stunnel 4.04 on i386--netbsdelf FORK+LIBWRAP with OpenSSL 0.9.7b 10 Apr 2003
Global options
cert            = /etc/stunnel/stunnel.pem
ciphers         = ALL:!ADH:+RC4:@STRENGTH
debug           = 5
key             = /etc/stunnel/stunnel.pem
pid             = /usr/pkg/var/run/
RNDbytes        = 64
RNDfile         = /dev/urandom
RNDoverwrite    = yes
session         = 300 seconds
verify          = none
Service-level options
TIMEOUTbusy     = 300 seconds
TIMEOUTclose    = 60 seconds
TIMEOUTidle     = 43200 seconds

[hf@heiligenberg] ~ # cat /etc/uucp/stunnel.conf 
# $Id: stunnel.conf,v 1.3 2003/09/08 21:16:52 hauke Exp hf $
# stunnel setup for uucp client

debug =

client = yes
pid = 

connect = uucp.XXXXX.YYY:940
exec = /usr/libexec/uucp/uucico
execargs = uucico --nodetach --nouuxqt --debug abnormal -S uucp

	After updating stunnel 3.xx to version 4, stunnel processes
	keep hanging around indefinitely after the uucico job is done,
	both in the background and in the foreground (option
	'foreground = yes'). With two uucp connects per hour, this
	gets annoying quickly.
	This did not happen with stunnel 3.xx. Since the stunnel group
	mis-designed other things (removing the cli options, for one),
	can we have an stunnel3 package?

	Do an 'stunnel /etc/uucp/stunnel.conf', see the job does not
	terminate when in the foreground, and processes keep hanging
	around when started as a daemon.

	Attach gdb:

(gdb) bt
#0  0x481c454b in select () from /usr/lib/
#1  0x8051032 in sselect (n=4, readfds=0xbfbff344, writefds=0x0, 
    exceptfds=0x0, timeout=0x0) at sselect.c:85
#2  0x8052bc0 in daemon_loop () at stunnel.c:195
#3  0x80527b9 in main_execute () at stunnel.c:105
#4  0x80526db in main (argc=2, argv=0xbfbff424) at stunnel.c:72
#5  0x804a594 in ___start ()
(gdb) up
#1  0x8051032 in sselect (n=4, readfds=0xbfbff344, writefds=0x0, 
    exceptfds=0x0, timeout=0x0) at sselect.c:85
85                  retval=select(n, readfds, writefds, exceptfds, NULL);
(gdb) info frame
Stack level 1, frame at 0xbfbff2e4:
 eip = 0x8051032 in sselect (sselect.c:85); saved eip 0x8052bc0
 called by frame at 0xbfbff394, caller of frame at 0xbfbff2e4
 source language c.
 Arglist at 0xbfbff2e4, args: n=4, readfds=0xbfbff344, writefds=0x0, 
    exceptfds=0x0, timeout=0x0
 Locals at 0xbfbff2e4, Previous frame's sp is 0x0
 Saved registers:
  ebx at 0xbfbff2cc, ebp at 0xbfbff2e4, eip at 0xbfbff2e8

	Set up a cron job that kills the rogue stunnel processes, or
	roll back to stunnel 3.

	Or, fix stunnel.