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: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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