2.6.[56]-1-686 mounts a read-only usb-storage as writable

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Date: Sat, 29 May 2004 18:35:25 +0300
To: debian-user@lists.debian.org

I'm running Sid with 2.6.6-1-686 kernel. I had several hangups as I
tried to use my usb-stick. Every process accessing my usb-flash hung up
and couldn't even be killed with -KILL. After several reboots I
found out that I had forgotten my flash as read-only, and mount
kept mounting it as writable.

It worked some time ago and I'm not sure when it stopped working (as
I'm normally putting the stick in ro-mode only when plugging it into
win-machines). 2.4.24-1-686 -kernel mounts the usb-flash as read only,
2.6.5-1-686 and 2.6.6-1-686 keep mount it as writable, when it is
hardware-readonly. Not sure about older 2.6-kernels.

Now when I tried to hang something up, I couldn't. Demo effect :) Just
got these errors below when syncing to a
hardware-write-protected-but-writable-mounted disk. Everything works
fine when I switch the stick to writable mode, or do a manual '-o ro'
-mount.

Here is what I have and get:
# /etc/fstab:
/dev/sdb1 /mnt/usbstick auto user,defaults 0 0

# mount:
/dev/sdb1 on /mnt/usbstick type vfat (rw,noexec,nosuid,nodev,user=sakke)
# ^^-- this is not true

# /var/log/messages:
May 29 17:26:05 limuz kernel: usb 1-2: new full speed USB device using
address 8
May 29 17:26:05 limuz kernel: scsi2 : SCSI emulation for USB Mass
Storage devices
May 29 17:26:05 limuz kernel: Vendor: PLEXTOR Model: PlexFlash
    Rev: 1.18
May 29 17:26:05 limuz kernel: Type: Direct-Access
    ANSI SCSI revision: 02
May 29 17:26:06 limuz kernel: SCSI device sdc: 507904 512-byte hdwr
sectors (260 MB)
May 29 17:26:06 limuz kernel: sdc: assuming Write Enabled
May 29 17:26:06 limuz kernel: /dev/scsi/host2/bus0/target0/lun0: p1 p2
May 29 17:26:06 limuz kernel: Attached scsi removable disk sdc at scsi2,
channel 0, id 0, lun 0
May 29 17:26:06 limuz usb.agent[8667]: usb-storage: already loaded
May 29 17:26:06 limuz scsi.agent[8690]: disk at
/devices/pci0000:00/0000:00:11.2/usb1/1-2/1-2:1.0/host2/2:0:0:0
May 29 17:26:48 limuz kernel: SCSI error : <2 0 0 0> return code = 0x8000002
May 29 17:26:48 limuz kernel: Current sdc: sense = 70 7
May 29 17:26:48 limuz kernel: ASC=27 ASCQ= 0
May 29 17:26:48 limuz kernel: Raw sense data:0x70 0x00 0x07 0x00 0x00
0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x27 0x00 0x00 0x00 0x00 0x00
May 29 17:26:48 limuz kernel: end_request: I/O error, dev sdc, sector 33
May 29 17:26:48 limuz kernel: lost page write due to I/O error on sdc1
May 29 17:26:53 limuz kernel: usb 1-2: USB disconnect, address 8
May 29 17:26:56 limuz kernel: usb 1-2: new full speed USB device using
address 9
May 29 17:26:57 limuz kernel: scsi3 : SCSI emulation for USB Mass
Storage devices
May 29 17:26:57 limuz usb.agent[8818]: usb-storage: already loaded
May 29 17:26:57 limuz kernel: Vendor: PLEXTOR Model: PlexFlash
    Rev: 1.18
May 29 17:26:57 limuz kernel: Type: Direct-Access
    ANSI SCSI revision: 02
May 29 17:26:57 limuz kernel: SCSI device sdb: 507904 512-byte hdwr
sectors (260 MB)
May 29 17:26:57 limuz kernel: sdb: assuming Write Enabled
May 29 17:26:58 limuz kernel: /dev/scsi/host3/bus0/target0/lun0: p1 p2
May 29 17:26:58 limuz kernel: Attached scsi removable disk sdb at scsi3,
channel 0, id 0, lun 0
May 29 17:26:58 limuz scsi.agent[8854]: disk at
/devices/pci0000:00/0000:00:11.2/usb1/1-2/1-2:1.0/host3/3:0:0:0
### Here I touched a file on the disk and did a "$ sync" ###
May 29 17:27:21 limuz kernel: SCSI error : <3 0 0 0> return code = 0x8000002
May 29 17:27:21 limuz kernel: Current sdb: sense = 70 7
May 29 17:27:21 limuz kernel: ASC=27 ASCQ= 0
May 29 17:27:21 limuz kernel: Raw sense data:0x70 0x00 0x07 0x00 0x00
0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x27 0x00 0x00 0x00 0x00 0x00
May 29 17:27:21 limuz kernel: end_request: I/O error, dev sdb, sector 33
May 29 17:27:21 limuz kernel: lost page write due to I/O error on sdb1
May 29 17:28:28 limuz kernel: via82cxxx_audio: not our index: reg=0x6,
newreg=0x0
May 29 17:28:28 limuz kernel: via82cxxx_audio: not our index: reg=0x6,
newreg=0x0
May 29 17:28:34 limuz kernel: apm: BIOS version 1.2 Flags 0x03 (Driver
version 1.16ac)
May 29 17:28:34 limuz kernel: apm: overridden by ACPI.
### Here I did a $ umount, the disk was umounted but no data written :)
May 29 17:33:37 limuz kernel: SCSI error : <3 0 0 0> return code = 0x8000002
May 29 17:33:37 limuz kernel: Current sdb: sense = 70 7
May 29 17:33:37 limuz kernel: ASC=27 ASCQ= 0
May 29 17:33:37 limuz kernel: Raw sense data:0x70 0x00 0x07 0x00 0x00
0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x27 0x00 0x00 0x00 0x00 0x00
May 29 17:33:37 limuz kernel: end_request: I/O error, dev sdb, sector 1816
May 29 17:33:37 limuz kernel: lost page write due to I/O error on sdb1
May 29 17:37:43 limuz kernel: SCSI error : <3 0 0 0> return code = 0x8000002
May 29 17:37:43 limuz kernel: Current sdb: sense = 70 7
May 29 17:37:43 limuz kernel: ASC=27 ASCQ= 0
May 29 17:37:43 limuz kernel: Raw sense data:0x70 0x00 0x07 0x00 0x00
0x00 0x00 0x0a 0x00 0x00 0x00 0x00 0x27 0x00 0x00 0x00 0x00 0x00
May 29 17:37:43 limuz kernel: end_request: I/O error, dev sdb, sector 33
May 29 17:37:43 limuz kernel: lost page write due to I/O error on sdb1
May 29 17:40:55 limuz shutdown[9001]: shutting down for system reboot

Is this a known bug or something new? Happened to anyone else? Didn't
found it via search.

-Sakke

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