>Number:         28958
>Category:       bin
>Synopsis:       lastlogin -t  causes a memory fault
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 14 03:12:00 +0000 2005
>Originator:     Karim Ayad
>Release:        NetBSD 2.0
>Organization:
>Environment:
NetBSD netix 2.0 NetBSD 2.0 (GENERIC_LAPTOP) # 0 Wed Dec  1 11:01:08 UTC 2004 builds@build:/big/builds/ab/netbsd-2-0-RELEASE/i386/2004/11/300000Z-obj/big/builds/ab/netbsd-2-0-RELEASE/src/sys/arch/i386/compile/GENERIC_LAPTOP i386
>Description:
If I erase the contents of the file /var/log/lastlog, lastlogin -t causes a memory fault.
>How-To-Repeat:
root# echo -n "" /var/log/lastlog

root# lastlogin -t

Memory Fault (core dumped)
>Fix:
--- /usr/src/usr.sbin/lastlogin/lastlogin.c	2005-01-14 04:09:23.000000000 +0100
+++ /usr/srcnew/usr.sbin/lastlogin/lastlogin.c	2005-01-14 02:39:49.000000000 +0100
@@ -140,7 +140,8 @@
 	setpassent(0);	/* Close passwd file pointers */
 
 	if (DOSORT(sortlog))
-		sortoutput(outstack);
+		if(outstack != NULL)
+			sortoutput(outstack);
 
 	fclose(fp);
 	exit(0);