kern/123726: page fault after ppp restart and pf resync

[Justin Jereza]

>Number:         123726
>Category:       kern
>Synopsis:       page fault after ppp restart and pf resync
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri May 16 06:10:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Justin Jereza
>Release:        FreeBSD 7.0-RELEASE-p1 i386
>Organization:
>Environment:
System: FreeBSD apollo.mainstreetph.dnsalias.com 7.0-RELEASE-p1 FreeBSD 7.0-RELEASE-p1 #0: Mon Apr 28 02:31:01 PHT 2008 root at apollo.mainstreetph.dnsalias.com:/usr/obj/usr/src/sys/APOLLO i386
>Description:
May be related to bug `kern/123363' (http://www.freebsd.org/cgi/query-pr.cgi?pr=123363) submitted previously. Backtrace looks similar.

Backtrace:

#0  doadump () at pcpu.h:195
#1  0xc075c1e7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2  0xc075c4ac in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3  0xc0a4efac in trap_fatal (frame=0xd68b19e4, eva=392) at /usr/src/sys/i386/i386/trap.c:899
#4  0xc0a4f210 in trap_pfault (frame=0xd68b19e4, usermode=0, eva=392) at /usr/src/sys/i386/i386/trap.c:812
#5  0xc0a4fbd9 in trap (frame=0xd68b19e4) at /usr/src/sys/i386/i386/trap.c:490
#6  0xc0a3684b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7  0xc074fd02 in _mtx_lock_sleep (m=0xc2f1bd08, tid=3295840848, opts=0, file=0x0, line=0)
    at /usr/src/sys/kern/kern_mutex.c:335
#8  0xc048b3e1 in hfsc_class_destroy (cl=0xc349f800) at /usr/src/sys/contrib/altq/altq/altq_hfsc.c:595
#9  0xc048b65b in hfsc_remove_altq (a=0xc317a460) at /usr/src/sys/contrib/altq/altq/altq_hfsc.c:350
#10 0xc04904ba in altq_remove (a=0xc317a460) at /usr/src/sys/contrib/altq/altq/altq_subr.c:655
#11 0xc313b309 in ?? ()
#12 0xc317a460 in ?? ()
#13 0xc317a380 in ?? ()
#14 0x00000000 in ?? ()
#15 0x01000000 in ?? ()
#16 0x00000000 in ?? ()
#17 0xc34588a0 in ?? ()
#18 0xd68b1be4 in ?? ()
#19 0xc3140295 in ?? ()
#20 0x00000006 in ?? ()
#21 0x00000000 in ?? ()
#22 0xc314d864 in ?? ()
#23 0x00000c55 in ?? ()
#24 0xc3b38c08 in ?? ()
#25 0x00000006 in ?? ()
#26 0xc3b38c38 in ?? ()
#27 0xc4728a50 in ?? ()
#28 0xc0ae10d5 in ?? ()
#29 0x00000119 in ?? ()
#30 0xd68b1ae8 in ?? ()
#31 0xc0a64955 in VOP_UNLOCK_APV (vop=0x6, a=0x0) at vnode_if.c:1676
Previous frame inner to this frame (corrupt stack?)
>How-To-Repeat:
# /etc/rc.d/ppp stop
# ifconfig tun0 destroy
# ifconfig tun0 create
# /etc/rc.d/ppp start
--- Message about pf resync failing ---
# /etc/rc.d/pf resync
--- page fault ---
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: