kern/78413: System freezes when removing mounted UMASS (USB-Stick)

[Harald Schmalzbauer]

>Number:         78413
>Category:       kern
>Synopsis:       System freezes when removing mounted UMASS (USB-Stick)
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Mar 04 15:00:40 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Harald Schmalzbauer
>Release:        FreeBSD 5.4-PRERELEASE i386
>Organization:
>Environment:
System: FreeBSD cale 5.4-PRERELEASE FreeBSD 5.4-PRERELEASE #0: Thu Mar 3 03:51:08 CET 2005 root at test1.flintsbach.schmalzbauer.de:/usr/obj/CALE/usr/src/sys/CALE i386


	dmesg:
umass0: USB Flash Disk, rev 2.00/2.00, addr 2
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <I-Stick2 IntelligentStick 2.00> Removable Direct Access SCSI-2 device
da0: 1.000MB/s transfers
da0: 249MB (511488 512 byte sectors: 64H 32S/T 249C)

	usbdevs:
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), Intel(0x0000), rev 1.00
 port 1 addr 2: full speed, power 200 mA, config 1, Flash Disk(0x2168), USB(0x0ea0), rev 2.00

>Description:
	When I remove my USB-Stick while it's mounted I can lock the maschine
	when I try to umount it for example.
>How-To-Repeat:
	Remove a USB stick while it's mounted.
>Fix:

	


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