Date: Tue, 13 Aug 2002 13:43:08 -0700 (PDT) From: Adam Crosby <acrosby@nps.k12.va.us> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/41635: dhclient kernel panics when dhcp server is unavailable Message-ID: <200208132043.g7DKh8U5072437@www.freebsd.org>
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>Number: 41635
>Category: misc
>Synopsis: dhclient kernel panics when dhcp server is unavailable
>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 Aug 13 13:50:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Adam Crosby
>Release: 4.6-RELEASE
>Organization:
Norfolk Public Schools
>Environment:
FreeBSD dev.nps.k12.va.us 4.6-RELEASE FreeBSD 4.6-RELEASE #0: Fri Aug 9 11:47:24 GMT 2002 root@dev.nps.k12.va.us:/usr/src/sys/compile/DEV i386
>Description:
Machine is a Compaq Deskpro with an Intel Pro/100 Adapter (fxp). Has been running fine for a few weeks. dhclient suddenly stopped being able to grab an IP address (this is a problem only on this machine). Upon reboot, dhclient failed to retrieve an address again. Running 'ifconfig' displays:
fxp0: flags=8843<UP, BROADCAST, RUNNING, SIMPLEX, MULTICAST> mtu 1500
ether 00:02:a5:31:11:f1
media: Ethernet autoselect (10BaseT/UTP)
status: active
Attempting to run 'dhclient' from the CLI results in the following kernel panic:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc01b2098
stack pointer = 0x10:0xd1af3df0
frame pointer = 0x10:0xd1af3e20
code segment = base 0x0, limit 0xffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 149 (ifconfig)
interrupt mask =
trap number = 12
panic: page fault
The NIC is active, has a link light. The DHCP server is working (hundreds of other PC's attest to that fact), and no configuration changes were made prior in the previous week to this problem - it just 'popped up'.
I've searched to see if this was a known issue with 4.6-RELEASE, as cvsupping is something I've tried to avoid (slow internet connection). If I need to cvsup and rebuild on 4.6-STABLE to fix this, that's fine. Thanks.
>How-To-Repeat:
Boot PC, and type 'dhclient' - Kernel panics instantly.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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