vol_id Segmentation fault

vol_id Segmentation fault

[Miguel Angelo Rozsas]

Dear developers,

There is a bug on /sbin/vol_id, which is part of udev, causing a Segmentation 
fault on some devices, mainly usb disks, like usb sticks and usb cameras.

When the device is conected to the usb system, the following messages can be 
found on /var/log/messages file:

Jan 10 16:26:11 gold kernel: usb 3-2: new full speed USB device using uhci_hcd 
and address 3
Jan 10 16:26:11 gold kernel: scsi7 : SCSI emulation for USB Mass Storage 
devices
Jan 10 16:26:11 gold kernel: usb-storage: device found at 3
Jan 10 16:26:11 gold kernel: usb-storage: waiting for device to settle before 
scanning
Jan 10 16:26:16 gold kernel:   Vendor: JVC       Model: GC-A70            Rev: 
1.00
Jan 10 16:26:16 gold kernel:   Type:   Direct-Access                      ANSI 
SCSI revision: 00
Jan 10 16:26:16 gold kernel: SCSI device sdd: 122880 512-byte hdwr sectors (63 
MB)
Jan 10 16:26:16 gold kernel: sdd: Write Protect is off
Jan 10 16:26:16 gold kernel: sdd: Mode Sense: 03 00 00 00
Jan 10 16:26:16 gold kernel: sdd: assuming drive cache: write through
Jan 10 16:26:16 gold kernel: SCSI device sdd: 122880 512-byte hdwr sectors (63 
MB)
Jan 10 16:26:16 gold kernel: sdd: Write Protect is off
Jan 10 16:26:16 gold kernel: sdd: Mode Sense: 03 00 00 00
Jan 10 16:26:16 gold kernel: sdd: assuming drive cache: write through
Jan 10 16:26:16 gold kernel:  sdd: sdd1
Jan 10 16:26:16 gold kernel: Attached scsi removable disk sdd at scsi7, 
channel 0, id 0, lun 0
Jan 10 16:26:16 gold kernel: Attached scsi generic sg3 at scsi7, channel 0, id 
0, lun 0,  type 0
Jan 10 16:26:16 gold kernel: usb-storage: device scan complete
Jan 10 16:26:18 gold kernel: printk: 54 messages suppressed.
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124160
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124161
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124162
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124163
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124164
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124165
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124166
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124167
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124160
Jan 10 16:26:18 gold kernel: Buffer I/O error on device sdd1, logical block 
124161
Jan 10 16:26:18 gold udevd-event[18585]: run_program: '/sbin/vol_id' abnormal 
exit

Running /sbin/vol_id /dev/sdd1 as root user with the device plugged:

gold:~ # /sbin/vol_id /dev/sdd1
Segmentation fault
gold:~ #

My system is a SuSE 10.1, my computer is a P4 2.8GHz from Dell (Optiplex 
170L).
My udev version is:

miguel@gold:~> rpm -qf /sbin/vol_id
udev-068git20050831-9.1
miguel@gold:~>

I hope you guys can figure out what is wrong. This bug stops the automatic 
mounting of device.

regards,

-- 
Miguel Angelo Rozsas
miguel@rozsas.xx.nom.br


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Re: vol_id Segmentation fault

[Kay Sievers]

On Tue, Jan 10, 2006 at 04:39:49PM -0200, Miguel Angelo Rozsas wrote:
> There is a bug on /sbin/vol_id, which is part of udev, causing a Segmentation 
> fault on some devices, mainly usb disks, like usb sticks and usb cameras.
> 
> When the device is conected to the usb system, the following messages can be 
> found on /var/log/messages file:

> gold:~ # /sbin/vol_id /dev/sdd1
> Segmentation fault

try this (adopt and type the lines with the asterisk):
  * $ gdb /sbin/vol_id
    GNU gdb 6.4
    ...
  * (gdb) r /dev/sda7
    Starting program: /sbin/vol_id /dev/sda7
    (no debugging symbols found)
    (no debugging symbols found)
    (no debugging symbols found)
    ID_FS_USAGE=filesystem
    ID_FS_TYPE=ext3
    ID_FS_VERSION=1.0
    ...

  * (gdb) bt

Also look where this ends
  strace -t -s1000 /sbin/vol_id /dev/sda7

> My system is a SuSE 10.1, my computer is a P4 2.8GHz from Dell (Optiplex 
> 170L).
>
> My udev version is:
> miguel@gold:~> rpm -qf /sbin/vol_id
> udev-068git20050831-9.1

You mean 10.0? The mentioned udev isn't from the current 10.1
which is under development.

> I hope you guys can figure out what is wrong. This bug stops the
> automatic  mounting of device.

How is that related to automounting, all you will miss, are the links in
/dev/disk/by-label/. HAL controls the automounting and does not depend
on vol_id to do that.

Kay


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