Date: Wed, 11 Oct 2006 10:44:18 +0200 (CEST) From: Gergely CZUCZY <phoemix@harmless.hu> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/104292: system lockup on forced umount of usb-storage device Message-ID: <200610110844.k9B8iIKi031382@marvin.harmless.hu> Resent-Message-ID: <200610110850.k9B8oJR4039268@freefall.freebsd.org>
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>Number: 104292 >Category: kern >Synopsis: system lockup on forced umount of usb-storage device >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Oct 11 08:50:18 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Gergely CZUCZY >Release: FreeBSD 6.2-PRERELEASE i386 >Organization: Harmless Digital Ltd >Environment: System: FreeBSD kign.harmless.lan 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Thu Oct 5 12:49:04 CEST 2006 root@kign.harmless.lan:/usr/obj/usr/src/sys/KIGN i386 >Description: When trying to force-umount a previously mounted USB mass-storage filesystem after unplugging the device, the system locks up and reboots. here, it happened with this device: umass0: Sony Sony DSC, rev 1.00/2.10, addr 5 da0 at umass-sim0 bus 0 target 0 lun 0 da0: <Sony Sony DSC 2.10> Removable Direct Access SCSI-0 device da0: 1.000MB/s transfers da0: 123MB (253696 512 byte sectors: 64H 32S/T 123C) >How-To-Repeat: 1) connect an USB mass-storage device 2) mount it like mount_msdosfs /dev/device /mnt/point 3) unplug the device (without umounting) 4) umount -f /mnt/point <-- here, the system will freeze and reboot. >Fix: N/A >Release-Note: >Audit-Trail: >Unformatted:
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