kern/129197: 7.0 IP stack related panic

[Rory Arms]

>Number:         129197
>Category:       kern
>Synopsis:       7.0 IP stack related panic
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Nov 26 01:10:02 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Rory Arms
>Release:        7.0-RELEASE
>Organization:
>Environment:
FreeBSD Tserver.TrueStep.com 7.0-RELEASE FreeBSD 7.0-RELEASE #1: Wed Mar 5 17:52:52 EST 2008 root at Tserver.TrueStep.com:/mnt/obj/usr/src/sys/TSERVER-70 i386
>Description:
Just logging what looks like a network stack related panic with 7.0-RELEASE

Tserver[~] 0> sudo kgdb /boot/kernel-70/kernel /usr/local/crash/vmcore.0 
Password:
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welcome to change it and/or distribute copies of it under certain conditions.
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This GDB was configured as "i386-marcel-freebsd"...

Unread portion of the kernel message buffer:
mber		= 12
panic: page fault
cpuid = 0
Uptime: 23d3h34m42s
Physical memory: 1015 MB
Dumping 248 MB: 233 217 201 185 169 153 137 121 105 89 73 57 41 25 9

Reading symbols from /boot/kernel-70/if_tap.ko...Reading symbols from /boot/kernel-70/if_tap.ko.symbols...done.
done.
Loaded symbols for /boot/kernel-70/if_tap.ko
Reading symbols from /boot/kernel-70/if_bridge.ko...Reading symbols from /boot/kernel-70/if_bridge.ko.symbols...done.
done.
Loaded symbols for /boot/kernel-70/if_bridge.ko
Reading symbols from /boot/kernel-70/bridgestp.ko...Reading symbols from /boot/kernel-70/bridgestp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel-70/bridgestp.ko
Reading symbols from /boot/kernel-70/green_saver.ko...Reading symbols from /boot/kernel-70/green_saver.ko.symbols...done.
done.
Loaded symbols for /boot/kernel-70/green_saver.ko
#0  doadump () at pcpu.h:195
195	pcpu.h: No such file or directory.
	in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:195
#1  0xc059fbd6 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2  0xc059feae in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3  0xc08190cc in trap_fatal (frame=0xe3ffba00, eva=12)
    at /usr/src/sys/i386/i386/trap.c:899
#4  0xc081933b in trap_pfault (frame=0xe3ffba00, usermode=0, eva=12)
    at /usr/src/sys/i386/i386/trap.c:812
#5  0xc0819d32 in trap (frame=0xe3ffba00) at /usr/src/sys/i386/i386/trap.c:490
#6  0xc080097b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7  0xc05ee5fc in sbsndptr (sb=0xc415fbb0, off=554, len=3902, moff=0xe3ffbac8)
    at /usr/src/sys/kern/uipc_sockbuf.c:939
#8  0xc06e8324 in tcp_output (tp=0xc410e740)
    at /usr/src/sys/netinet/tcp_output.c:802
#9  0xc06e5ff5 in tcp_do_segment (m=0xc572b200, th=0xc572b270, so=0xc415fad4, 
    tp=0xc410e740, drop_hdrlen=52, tlen=0)
    at /usr/src/sys/netinet/tcp_input.c:2347
#10 0xc06e6ffe in tcp_input (m=0xc572b200, off0=20)
    at /usr/src/sys/netinet/tcp_input.c:845
#11 0xc06879a0 in ip_input (m=0xc572b200)
    at /usr/src/sys/netinet/ip_input.c:665
#12 0xc064099b in netisr_processqueue (ni=0xc08fbb98)
    at /usr/src/sys/net/netisr.c:143
#13 0xc0640cab in swi_net (dummy=0x0) at /usr/src/sys/net/netisr.c:256
---Type <return> to continue, or q <return> to quit---
#14 0xc058242b in ithread_loop (arg=0xc3b00240)
    at /usr/src/sys/kern/kern_intr.c:1036
#15 0xc057f154 in fork_exit (callout=0xc0582260 <ithread_loop>, 
    arg=0xc3b00240, frame=0xe3ffbd38) at /usr/src/sys/kern/kern_fork.c:781
#16 0xc08009f0 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:205
(kgdb) print panicstr
$1 = 0xc08f3e00 "page fault"
(kgdb) 

See PR 121485 or 125617  for this server's kernel configuration.
>How-To-Repeat:
none that I know of.. this panic happened under normal conditions. The system wasn't doing anything out of the ordinary. I don't think there were any recent configuration changes, either.
>Fix:


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