128640 – portmap has SIGCHLD set to SIG_IGN but calls wait()

Bug 128640 - portmap has SIGCHLD set to SIG_IGN but calls wait()

Summary: portmap has SIGCHLD set to SIG_IGN but calls wait()

Keywords:
Status:	CLOSED WONTFIX
Alias:	None
Product:	Red Hat Enterprise Linux 3
Classification:	Red Hat
Component:	portmap
Sub Component:
Version:	3.0
Hardware:	i386
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Steve Dickson
QA Contact:	Jay Turner
Docs Contact:
URL:
Whiteboard:	RHEL3U7NAK
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2004-07-27 16:47 UTC by Marc Schmitt
Modified:	2015-01-08 00:08 UTC (History)
CC List:	3 users (show)
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed:	2006-05-02 20:29:59 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)

Description Marc Schmitt 2004-07-27 16:47:07 UTC

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040510

Description of problem:
The portmapper under RHEL3 AS (2.4.21-15.0.3.EL, probably WS, too)
appears to have a problem:

Jul 27 15:55:51 foo kernel: application bug: portmap(21231) has
SIGCHLD set to SIG_IGN but calls wait().
Jul 27 15:57:00 foo kernel: application bug: portmap(21231) has
SIGCHLD set to SIG_IGN but calls wait().
Jul 27 15:58:04 foo kernel: application bug: portmap(21231) has
SIGCHLD set to SIG_IGN but calls wait().
Jul 27 16:01:36 foo kernel: application bug: portmap(21231) has
SIGCHLD set to SIG_IGN but calls wait().

I don't know what triggers those lines and I don't notice any problems
with the machine, either. The portmapper appears to work fine.

The output of `rpcinfo -p` looks like this:
   program vers proto   port
    100000    2   tcp    111  portmapper
    100000    2   udp    111  portmapper
    391002    2   tcp  32769  sgi_fam
    100024    1   udp  47544  status
    100024    1   tcp  59745  status
    100011    1   udp    684  rquotad
    100011    2   udp    684  rquotad
    100011    1   tcp    687  rquotad
    100011    2   tcp    687  rquotad
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100021    1   udp  47547  nlockmgr
    100021    3   udp  47547  nlockmgr
    100021    4   udp  47547  nlockmgr
    100021    1   tcp  59747  nlockmgr
    100021    3   tcp  59747  nlockmgr
    100021    4   tcp  59747  nlockmgr
    100005    1   udp    726  mountd
    100005    1   tcp    729  mountd
    100005    2   udp    726  mountd
    100005    2   tcp    729  mountd
    100005    3   udp    726  mountd
    100005    3   tcp    729  mountd

I found only one similar problem
(http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=117333) and
judging by the comment of Chip Turner I thought I'd post this issue here.

Version-Release number of selected component (if applicable):
portmap-4.0-56

How reproducible:
Didn't try


Additional info:

Let me know if you need any other information. Thanks.

Comment 1 Steve Dickson 2004-08-12 17:06:22 UTC

This appears to be fixed in the latest release by
this code:

#ifdef IGNORE_SIGCHLD           /* Lionel Cons <cons.ch> */
    (void)signal(SIGCHLD, SIG_IGN);
#else
    (void)signal(SIGCHLD, reap);
#endif

with reap() doing the wait3() which will not called if IGNORE_SIGCHLD 
is set.

Comment 21 Steve Dickson 2006-05-02 20:29:59 UTC

After further review it appears code is there but... the compile flag
IGNORE_SIGCHLD is not being set... and I really don't want to
turn it on at this late stage of the release cycle...  So I'm
closing  this as WONTFIX...

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