On Tue, 22 Jun 2004, Tomasz Motylewski wrote:

> Hello Alan,
> 
> Thank you for taking your time to inform all involved people. I have made first
> a test on plain 2.6.7 kernel without any patch to make sure I can reproduce it
> again.
> 
> Simultaneously:
> 
> # dd if=random.bin of=/dev/sda bs=1M seek=140000
> 240+0 records in
> 240+0 records out
> 251658240 bytes transferred in 142.382673 seconds (1767478 bytes/sec)
> 
> # mke2fs /dev/sda2
> mke2fs 1.35 (28-Feb-2004)
> Filesystem label=
> OS type: Linux
> Block size=4096 (log=2)
> Fragment size=4096 (log=2)
> 7946240 inodes, 15870211 blocks
> 793510 blocks (5.00%) reserved for the super user
> First data block=0
> 485 block groups
> 32768 blocks per group, 32768 fragments per group
> 16384 inodes per group
> Superblock backups stored on blocks:
>         32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
>         4096000, 7962624, 11239424
> 
> Writing inode tables: done
> Writing superblocks and filesystem accounting information: done
> 
> This filesystem will be automatically checked every 32 mounts or
> 180 days, whichever comes first.  Use tune2fs -c or -i to override.
> 
> Please note that both seemed to complete succesfully, although the USB disk
> controller has really hung.
> 
> End of log (I will send complete to you in a separate mail):
> Jun 22 12:01:45 motyl kernel: usb-storage: Command TEST_UNIT_READY (6 bytes)
> Jun 22 12:01:45 motyl kernel: usb-storage:  00 00 00 00 00 00
> Jun 22 12:01:45 motyl kernel: usb-storage: Bulk Command S 0x43425355 T 0x49f6 L
> 0 F 0 Trg 0 LUN 0 CL 6
> Jun 22 12:01:45 motyl kernel: usb-storage: usb_stor_bulk_transfer_buf: xfer 31
> bytes
> Jun 22 12:01:46 motyl kernel: 0:0): rejecting I/O to device being removed
> Jun 22 12:01:46 motyl kernel: scsi0 (0:0): rejecting I/O to device being
> removed
> Jun 22 12:01:48 motyl last message repeated 7292 times
> Jun 22 12:01:48 motyl kernel: usb-storage: -- sending exit command to thread
> Jun 22 12:01:48 motyl kernel: usb-storage: *** thread awakened.
> Jun 22 12:01:48 motyl kernel: usb-storage: -- exit command received
> Jun 22 12:01:48 motyl kernel: usb-storage: -- usb_stor_release_resources
> finished
> Jun 22 12:01:49 motyl kernel: scsi0 (0:0): rejecting I/O to dead device
> Jun 22 12:01:49 motyl last message repeated 730 times
> Jun 22 12:01:49 motyl kernel: slab error in kmem_cache_destroy(): cache
> `scsi_cmd_cache': Can't free all objects
> Jun 22 12:01:49 motyl kernel:  [dump_stack+30/48]
> Jun 22 12:01:49 motyl kernel:  [kmem_cache_destroy+136/256]
> Jun 22 12:01:49 motyl kernel:  [scsi_destroy_command_freelist+90/144]
> Jun 22 12:01:49 motyl kernel:  [scsi_host_dev_release+50/144]
> Jun 22 12:01:49 motyl kernel:  [device_release+93/112]
> Jun 22 12:01:49 motyl kernel:  [kobject_cleanup+149/160]
> Jun 22 12:01:49 motyl kernel:  [scsi_disk_put+48/80]
> Jun 22 12:01:49 motyl kernel:  [sd_release+58/112]
> Jun 22 12:01:49 motyl kernel:  [blkdev_put+379/416]
> Jun 22 12:01:49 motyl kernel:  [__fput+285/304]
> Jun 22 12:01:49 motyl kernel:  [filp_close+87/144]
> Jun 22 12:01:49 motyl kernel:  [sys_close+97/160]
> Jun 22 12:01:49 motyl kernel:  [syscall_call+7/11]
> Jun 22 12:01:49 motyl kernel:
> Jun 22 12:07:52 motyl kernel: Slab corruption: start=df7a9af4, len=1024
> Jun 22 12:07:52 motyl kernel: Redzone: 0x5a2cf071/0x5a2cf071.
> Jun 22 12:07:52 motyl kernel: Last user: [put_files_struct+146/224]
> Jun 22 12:07:52 motyl kernel: 100: 6b 6b 6b 6b 6b 6b 6b 6b 6a 6b 6b 6b 6b 6b 6b
> 6b
> Jun 22 12:07:52 motyl kernel: Prev obj: start=df7a96e8, len=1024
> Jun 22 12:07:52 motyl kernel: Redzone: 0x170fc2a5/0x170fc2a5.
> Jun 22 12:07:52 motyl kernel: Last user: [alloc_fd_array+36/64]
> Jun 22 12:07:52 motyl kernel: 000: 78 94 5d de 50 d0 2b d3 50 d0 2b d3 90 5e 62
> c2
> Jun 22 12:07:52 motyl kernel: 010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00
> 
> Best regards,
> --
> Tomasz Motylewski

This looks like a bug in the SCSI drivers.  You should report it on the 
SCSI development mailing list.

Alan Stern



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