xsrc/47305: Xorg segfaults when using X font server

[cheusov%tut.by@localhost]

>Number:         47305
>Category:       xsrc
>Synopsis:       Xorg segfaults when using X font server
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    xsrc-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 10 13:45:01 +0000 2012
>Originator:     Aleksey Cheusov
>Release:        NetBSD 6.0.0_PATCH
>Organization:
>Environment:
System: NetBSD cheusov.imb.invention.com 6.0.0_PATCH NetBSD 6.0.0_PATCH 
(GENERIC) #3: Fri Dec 7 11:55:38 FET 2012 
cheusov%cheusov.imb.invention.com@localhost:/srv/obj/sys/arch/i386/compile/GENERIC
 i386
Architecture: i386
Machine: i386
>Description:
The following commands

   xset fp+ tcp/hostname:7100
   xlsfonts

crashes X server. Backtrace is below

(gdb) bt
#0  0xbb8d4c27 in _lwp_kill () from /usr/lib/libc.so.12
#1  0xbb8d4bdf in raise (s=6) at /srv/src_netbsd6/lib/libc/gen/raise.c:48
#2  0xbb8d44c3 in abort () at /srv/src_netbsd6/lib/libc/stdlib/abort.c:74
#3  0x08195528 in OsAbort ()
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/os/utils.c:1244
#4  0x080a5b24 in ddxGiveUp ()
    at 
/srv/xsrc_netbsd6/external/mit/xorg-server/dist/hw/xfree86/common/xf86Init.c:915
#5  0x080a5bcb in AbortDDX ()
    at 
/srv/xsrc_netbsd6/external/mit/xorg-server/dist/hw/xfree86/common/xf86Init.c:961
#6  0x0818eea7 in AbortServer ()
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/os/log.c:414
#7  0x0818ef84 in FatalError (f=0x82099f4 "Caught signal %d (%s). Server 
aborting\n")
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/os/log.c:540
#8  0x08195deb in OsSigHandler (signo=11, sip=0xbfbfe818, unused=0xbfbfe898)
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/os/osinit.c:153
#9  <signal handler called>
#10 ProcessWorkQueue ()
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/dix/dixutils.c:527
#11 0x0819add8 in WaitForSomething (pClientsReady=0xb7b97c00)
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/os/WaitFor.c:173
#12 0x080943f1 in Dispatch ()
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/dix/dispatch.c:367
#13 0x0806f30e in main (argc=5, argv=0xbfbfed94, envp=0xbfbfedac)
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/dix/main.c:287
(gdb) frame 10
#10 ProcessWorkQueue ()
    at /srv/xsrc_netbsd6/external/mit/xorg-server/dist/dix/dixutils.c:527
527             if ((*q->function) (q->client, q->closure))
(gdb) p q
$1 = (WorkQueuePtr) 0x6c676c6f
(gdb) p p
$2 = (WorkQueuePtr *) 0x822bfb0
(gdb)

>How-To-Repeat:
1)
/etc/rc.d/xfs:
   clone-self = on
   use-syslog = off
   catalogue = /usr/X11R7/lib/X11/fonts/misc/
   error-file = /var/log/xfs.log

   default-point-size = 120
   default-resolutions = 75,75,100,100

2)
/etc/rc.d/xfs onestart

3)
Start Xorg

4)
   xset fp+ tcp/localhost:7100
   xlsfonts
   <crash happens here>

>Fix: