Date: Tue, 29 Jan 2002 23:42:28 +0200 (EET) From: Mishka <mishka@terabyte.com.ua> To: FreeBSD-gnats-submit@freebsd.org Cc: <mishka@batraq.anything3d.com> Subject: i386/34422: crash system wnen kill pppd with reattached umodem Message-ID: <200201292142.g0TLgS405906@victor.terabyte.com.ua>
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>Number: 34422 >Category: i386 >Synopsis: crash system wnen kill pppd with reattached umodem >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 29 13:50:01 PST 2002 >Closed-Date: >Last-Modified: >Originator: Mishka >Release: FreeBSD 4.5-RC i386 >Organization: Terabyte ACS >Environment: System: FreeBSD victor.terabyte.com.ua 4.5-RC FreeBSD 4.5-RC #2: Sun Jan 27 18:28:25 EET 2002 mishka@victor.terabyte.com.ua:/usr/src/sys/compile/VMUNIX i386 (updated 27/01/2002, 18:00 EET) Hardware: 3Com OfficeConnect 56K Business Modem attached to Intel USB onto Asus P2B-LS systemboard / ippII-350 / Kingston ValueRam KVR133X64C3/256 / Seagate SCSI-LVD (usbdevs output, usbd runned also): addr 1: UHCI root hub, Intel addr 2: 3Com OfficeConnect Analog Modem, 3Com Inc. >Description: Dear Sirs!!! Some situation have discouraged me last few days. Our server have runned pppd, attached to /dev/umodem0. When i switch modem power off and then turn it on or just detach then attach USB cord, pppd loss /dev/umodem0 descriptor (i think). Next when i try kill pppd process by "kill 179" (real process number) i got followed trap messages and server ask me for shutdown: -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Fatal trap 12: page fault while in kernel mode fault virtual address = 0x4 fault code = supervisor read, page not present instructin pointer = 0x8:0xc015411b stack pointer = 0x10:0xc8245d18 frame pointer = 0x10:0xc8245d18 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 = 179 (pppd) interrupt mask = tty trap number = 12 panic: page fault syncing disks... 33 1 done Uptime: 10m11s Automatic reboot in 15 seconds - press any key on the console to abort -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- However, when i do this expirement with always attached and turned on modem all works perfectly - no any system panic appears. Of course I can't run pppd with detached umodem0 port. Unfortunately i can't test this situation on other hardware/OS machine. Any ideas? >How-To-Repeat: -- BR, Mishka. <mishka@terabyte.com.ua> <mishka@batraq.anything3d.com> >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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