Re: [Jfs-discussion] fsck: attempt to access beyond end of device

[Jeff M. <mar...@au...>]

Anthony,

This is a partition table problem in the kernel.  The problem was introduced in
2.4.11 and should have been fixed in 2.4.13.

Jeff Martin
IBM (LTC-Test)

Anthony Liu wrote:

> Hi,
>
> This is a very strange problem, anyone seen something like this
> in your logs?
>
> Doing mkfs.jfs or fsck the following will show up (11 times)
>
>         kernel: attempt to access beyond end of device
>         kernel: 03:01: rw=0, want=1052228, limit=1052226
>
> fdisk -l output:
>
> Disk /dev/had: 255 heads, 63 sectors, 5005 cylinders
> Units = cylinders of 16065 * 512 bytes
>
>         Device Boot    Start       End    Blocks   Id  System
>         /dev/hda1   *         1       131   1052226   83  Linux
>         /dev/hda2   *       132       135     32130   83  Linux
>         /dev/hda3           136       184    393592+  82  Linux swap
>         /dev/hda4           185      5005  38724682+   5  Extended
>         /dev/hda5           185      3985  30531532   83  Linux
>         /dev/hda6          3986      4507   4192964+  83  Linux
>         /dev/hda7          4508      5005   4000184+  83  Linux
>
> Note:
> /dev/hda6 is jfs formatted. jfsprogs 1.0.8
> Kernels tested are 2.4.13 and 2.4.13-pre3
> This problem also show up on another system/drive.
>
> When reboot to the same kernel, the problem disappeared...
>
> mkfs.jfs /dev/hda1 gives:
> --cut-------------------------------------------------------
> mkfs.jfs version 1.0.8, 17-Oct-2001
>
> Warning!  All data on device /dev/hda1 will be lost!
>
> Continue? (Y/N) y
>    -
>
> Format completed successfully.
>
> 1052226 kilobytes total disk space.
> --cut------------------------------------------------------
>
> However, fsck report that only 1052224k is the total:
>
> fsck.jfs -v -f /dev/hda1
> --cut------------------------------------------------------
> fsck.jfs version 1.0.8, 17-Oct-2001
> The current device is:  /dev/hda1
> (chklog) FSCK  Open(...READ/WRITE EXCLUSIVE...) returned rc = 0
>
> (chklog) FSCK  Primary superblock is valid.
>
> (chklog) FSCK  The type of file system for the device is JFS.
>
> Block size in bytes:  4096
> File system size in blocks:  263056
> Phase 0 - Replay Journal Log
> (chklog) FSCK:LOGREDO:  Journal log is now open.  (major = 0x00, minor = 0x00)
>
> (chklog) FSCK:LOGREDO:  Log already redone!
>
> (chklog) FSCK  logredo returned rc = 0
>
> Phase 1 - Check Blocks, Files/Directories, and Directory Entries.
> Phase 2 - Count Links.
> Phase 3 - Rescan for Duplicate Blocks and Verify Directory Tree.
> Phase 4 - Report Problems.
> Phase 5 - Check Connectivity.
> Phase 6 - Perform Approved Corrections.
> Phase 7 - Rebuild File/Directory Allocation Maps.
> Phase 8 - Rebuild Disk Allocation Maps.
> (chklog) FSCK  Filesystem Summary:
>
> (chklog) FSCK    Blocks in use for inodes:  8
>
> (chklog) FSCK    Inode count:  64
>
> (chklog) FSCK    File count:  0
>
> (chklog) FSCK    Directory count:  1
>
> (chklog) FSCK    Block count:  263056
>
> (chklog) FSCK    Free block count:  261652
>
> (chklog)   1052224 kilobytes total disk space.
>
> (chklog)         0 kilobytes in 1 directories.
>
> (chklog)         0 kilobytes in 0 user files.
>
> (chklog)         0 kilobytes in extended attributes
>
> (chklog)         0 kilobytes in access control lists
>
> (chklog)      5616 kilobytes reserved for system use.
>
> (chklog)   1046608 kilobytes are available for use.
>
> File system is clean.
> (chklog) FSCK  All observed inconsistencies have been repaired.
>
> (chklog) FSCK  Filesystem has been marked clean.
>
> (chklog) FSCK **** Filesystem was modified. ****
>
> (chklog) FSCK  processing terminated:  10/29/2001 17.35.0   with return code: 0.
>
>     |........
> --cut------------------------------------------------------
>
> After mounting /dev/hda1, copying some files to it, umount it and perform
> a fsck.jfs, the same "attempt to access beyond end of device" error will
> show up.  The pair of messages repeated exactly 11 times when it
> was triggered.
>
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