Date: Thu, 16 Sep 2004 11:38:41 GMT From: Claudio Destro <o1b6@tiscali.it> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/71791: Fatal trap 12: page fault while in kernel mode Message-ID: <200409161138.i8GBcf1N075379@www.freebsd.org> Resent-Message-ID: <200409161140.i8GBeQhj001658@freefall.freebsd.org>
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>Number: 71791
>Category: kern
>Synopsis: Fatal trap 12: page fault while in kernel mode
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Sep 16 11:40:25 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator: Claudio Destro
>Release: FreeBSD 5.3-BETA4 i386
>Organization:
>Environment:
>Description:
I receive a fatal trap 12 *every* time I disconnect my usb mass storage.
Inserting is ok:
..
uhub1: Sony USB Embedded Hub, class 9/0, rev. 2.00/0.01, addr3
uhub1: 1 port with 0 removable, self powered
umass0: Sony USB Mass Storage Denic, rev 2.00/0.01, addr 4
da1: at umass-sim0 bus 0 target 0 lun 0
da1: <Sony Storage Media 1.00> Removable Direct Access SCSI-0 device
da1: 1.000MB/s transfers
da1: 125MB (256000 512 bytes sectors; 64H 32/T 125LI)
..
Removing results in a kernel panic:
uhub1: at ubhub0 port 1 (addr 3) disconnected
(da:umass-sim0:0:0:0): lost device
(da:umass-sim0:0:0:0): removing device entry
umass0: detached
(null): at uhub1 port 1 (addr 4) disconnected
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x400
fault code = supervisor read, page not present
instruction pointer = 0x84 0xc0690904
stack pointer = 0x10 0xcc746bd4
frame pointer = 0x10 0xcc746bf4
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 = 37 (usb0)
trap number = 12
..
I dumped these info by hand this morning, but I think there are no errors...
hope this helps.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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