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Date: Tue, 30 Jan 2001 08:19:43 -0800 (PST)
From: paulsen@orbiteam.de
To: freebsd-gnats-submit@FreeBSD.org
X-Send-Pr-Version: www-1.0
Subject: kern/24739: "kldunload ipf" kernel module (V3.4.16) crashs freebsd
Sender: owner-freebsd-bugs@FreeBSD.ORG
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>Number:         24739
>Category:       kern
>Synopsis:       "kldunload ipf" kernel module (V3.4.16) crashs freebsd
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 30 08:20:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Volker Paulsen
>Release:        4.2-STABLE
>Organization:
OrbiTeam Software GmbH
>Environment:
FreeBSD ns.orbiteam.de 4.2-STABLE FreeBSD 4.2-STABLE #0: Tue Jan 16 14:22:47 CET 2001     root@ns.orbiteam.de:/usr/obj/usr/src/sys/ORBI-NS  i386
>Description:
Unloading the dynamic kernel module of ipfilter 3.4.16 causes a kernel
panic:

Jan 29 14:06:03 ns /kernel: IP Filter: v3.4.16 unloaded
Jan 29 14:08:29 ns /kernel: Copyright (c) 1992-2001 The FreeBSD Project.

root@ns 16:55 [crash] gdb -k kernel.0 vmcore.0 
...
IdlePTD 3985408
initial pcb at 321d40
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x10
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc018fbb3
stack pointer           = 0x10:0xccc52da4
frame pointer           = 0x10:0xccc52dc4
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 59 (ipmon)
interrupt mask          = none
trap number             = 12
panic: page fault

syncing disks... 1 
done
...
>How-To-Repeat:
kldunload ipf
>Fix:


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


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