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Date:      Mon, 31 May 2004 18:05:34 +0200 (CEST)
From:      Cyril Guibourg <aragorn+ports@teaser.fr>
To:        FreeBSD-gnats-submit@FreeBSD.org
Subject:   ports/67419: milter-greylist 1.2.2 will crash upon conf reload
Message-ID:  <200405311605.i4VG5YMi066639@blackbox.babasse.net>
Resent-Message-ID: <200405311610.i4VGAP6w013355@freefall.freebsd.org>
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>Number:         67419
>Category:       ports
>Synopsis:       milter-greylist 1.2.2 will crash upon conf reload
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          maintainer-update
>Submitter-Id:   current-users
>Arrival-Date:   Mon May 31 09:10:25 PDT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Cyril Guibourg
>Release:        FreeBSD 4.10-RELEASE i386
>Organization:
Home, sweet home
>Environment:
System: FreeBSD blackbox.babasse.net 4.10-RELEASE FreeBSD 4.10-RELEASE #4: Fri May 28 22:10:50 CEST 2004 root@blackbox.babasse.net:/usr/obj/usr/src/sys/EPIA-M9000 i386


>Description:

	Program will crash (SIGSEV) upon conf reload because of default
	stack size too low in libpthread.

>How-To-Repeat:

	Update or touch the configuration file and wait for the next incoming
	email.

>Fix:

	Given by software author: create a specific thread for conf
	reload, using pthread_attr_setstacksize() accordingly.

	Makefile diff and patch for ${WRKSRC}/conf.c follow.

	Thanks.



--- Makefile.orig	Thu May 27 13:44:54 2004
+++ Makefile	Mon May 31 17:03:09 2004
@@ -7,6 +7,7 @@
 
 PORTNAME=	milter-greylist
 PORTVERSION=	1.2.2
+PORTREVISION=	1
 CATEGORIES=	mail
 MASTER_SITES=	ftp://ftp.espci.fr/pub/milter-greylist/
 EXTRACT_SUFX=	.tgz
@@ -33,15 +34,16 @@
 		${FILESDIR}/milter-greylist.sh > ${WRKSRC}/milter-greylist.sh
 
 post-install:
-	${MKDIR} /var/milter-greylist /var/db/milter-greylist
-	${CHOWN} smmsp /var/milter-greylist /var/db/milter-greylist
-	${MKDIR} ${PREFIX}/etc/rc.d
-	${INSTALL_SCRIPT} ${WRKSRC}/milter-greylist.sh ${PREFIX}/etc/rc.d/
+	@${MKDIR} /var/milter-greylist /var/db/milter-greylist
+	@${CHOWN} smmsp /var/milter-greylist /var/db/milter-greylist
+	@${MKDIR} ${PREFIX}/etc/rc.d
+	@${INSTALL_SCRIPT} ${WRKSRC}/milter-greylist.sh ${PREFIX}/etc/rc.d/
 .if !defined(NOPORTDOCS)
-	${MKDIR} ${DOCSDIR}
-	${MKDIR} ${EXAMPLESDIR}
-	${INSTALL_DATA} ${WRKSRC}/README ${DOCSDIR}
-	${INSTALL_DATA} ${WRKSRC}/greylist.conf ${EXAMPLESDIR}
+	@${MKDIR} ${DOCSDIR}
+	@${MKDIR} ${EXAMPLESDIR}
+	@${INSTALL_DATA} ${WRKSRC}/README ${DOCSDIR}
+	@${INSTALL_DATA} ${WRKSRC}/greylist.conf ${EXAMPLESDIR}
 .endif
+	@${CAT} ${PKGMESSAGE}
 
 .include <bsd.port.mk>

	>8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8 >8

--- conf.c.orig	Fri Apr  2 17:06:52 2004
+++ conf.c	Mon May 31 16:58:06 2004
@@ -34,7 +34,7 @@
 #ifdef HAVE_SYS_CDEFS_H
 #include <sys/cdefs.h>
 #ifdef __RCSID
-__RCSID("$Id: conf.c,v 1.15 2004/04/02 15:06:52 manu Exp $");
+__RCSID("$Id: conf.c,v 1.15 (sigsev patch) 2004/04/02 15:06:52 manu Exp $");
 #endif
 #endif
 
@@ -83,6 +83,8 @@
 conf_load(void) 	/* exceptlist must be write-locked */
 {
 	FILE *stream;
+	pthread_t tid;
+	pthread_attr_t attr;
 
 	/*
 	 * Reset the configuration to its default 
@@ -100,8 +102,49 @@
 		return;
 	}
 
+	/*
+	 * On some platforms, the thread stack limit is too low and
+	 * conf_parse will get a SIGSEGV because it overflows the
+	 * stack.
+	 *
+	 * In order to fix this, we spawn a new thread just for 
+	 * parsing the config file, and we request a stack big 
+	 * enough to hold the parser data. 2 MB seems okay.
+	 */
+
 	conf_in = stream;
-	conf_parse();
+
+	if (pthread_attr_init(&attr) != 0) {
+		syslog(LOG_ERR, "pthread_attr_init failed: %s", 
+		strerror(errno));
+		exit(EX_OSERR);
+	}
+
+	if (pthread_attr_setstacksize(&attr, 2 * 1024 * 1024) != 0) {
+		syslog(LOG_ERR, "pthread_attr_setstacksize failed: %s",
+		strerror(errno));
+		exit(EX_OSERR);
+	}
+
+	if (pthread_create(&tid, &attr, 
+		(void *(*)(void *))conf_parse, NULL) != 0) {
+		syslog(LOG_ERR, "pthread_create failed: %s", 
+		strerror(errno));
+		exit(EX_OSERR);
+	}
+
+	if (pthread_join(tid, NULL) != 0) {
+		syslog(LOG_ERR, "pthread_join failed: %s",
+		strerror(errno));
+		exit(EX_OSERR);
+	}
+
+	if (pthread_attr_destroy(&attr) != 0) {
+		syslog(LOG_ERR, "pthread_attr_destroy failed: %s",
+		strerror(errno));
+		exit(EX_OSERR);
+	}
+
 	fclose(stream);
 
 	(void)gettimeofday(&conffile_modified, NULL);
>Release-Note:
>Audit-Trail:
>Unformatted:

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