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    SubjectRe: Still ext2-corruption in test8-pre5 (incl. OOPS)
    On Tue, Sep 05, 2000 at 07:14:02PM -0700, Linus Torvalds wrote:

    > How about this patch?

    Got this oops.

    Tim.
    */

    ksymoops 2.3.3 on i586 2.4.0-test8-pre5+trfix. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.4.0-test8-pre5+trfix/ (default)
    -m /boot/System.map-2.4.0-test8-pre5+trfix (specified)

    Unable to handle kernel NULL pointer dereference at virtual address 00000000
    c012cae6
    *pde = 00000000
    Oops: 0000
    CPU: 0
    EIP: 0010:[<c012cae6>]
    Using defaults from ksymoops -t elf32-i386 -a i386
    EFLAGS: 00010206
    eax: 00000000 ebx: 00000080 ecx: 00000000 edx: 00000c00
    esi: c10f02c0 edi: 00000400 ebp: 00000242 esp: c39d5e38
    ds: 0018 es: 0018 ss: 0018
    Process pine (pid: 1295, stackpage=c39d5000)
    Stack: 00000084 00000000 c63353c0 c1299e0a c10f02c0 00000000 c654b2c0 c63353c0
    00000081 00000dbe 00000020 00000000 c0148487 c633545c 00020dbe 00000000
    c014786c c63353c0 00000048 c39d5f70 00020dbe 00000000 c3c0d600 c1299e00
    Call Trace: [<c0148487>] [<c014786c>] [<c012036b>] [<c011e685>] [<c011e776>] [<c013c41a>] [<c013c4e8>]
    [<c0128b99>] [<c0128e00>] [<c0108e4f>]
    Code: 8b 00 ff 44 24 20 89 44 24 2c 39 54 24 24 73 ea 8b 54 24 2c

    >>EIP; c012cae6 <block_truncate_page+d2/1c8> <=====
    Trace; c0148487 <ext2_truncate+c3/48c>
    Trace; c014786c <ext2_get_block+0/534>
    Trace; c012036b <truncate_inode_pages+1eb/204>
    Trace; c011e685 <vmtruncate+51/150>
    Trace; c011e776 <vmtruncate+142/150>
    Trace; c013c41a <inode_setattr+36/ac>
    Trace; c013c4e8 <notify_change+58/70>
    Trace; c0128b99 <do_truncate+49/60>
    Trace; c0128e00 <sys_ftruncate+100/11c>
    Trace; c0108e4f <tracesys+1f/23>
    Code; c012cae6 <block_truncate_page+d2/1c8>
    00000000 <_EIP>:
    Code; c012cae6 <block_truncate_page+d2/1c8> <=====
    0: 8b 00 movl (%eax),%eax <=====
    Code; c012cae8 <block_truncate_page+d4/1c8>
    2: ff 44 24 20 incl 0x20(%esp,1)
    Code; c012caec <block_truncate_page+d8/1c8>
    6: 89 44 24 2c movl %eax,0x2c(%esp,1)
    Code; c012caf0 <block_truncate_page+dc/1c8>
    a: 39 54 24 24 cmpl %edx,0x24(%esp,1)
    Code; c012caf4 <block_truncate_page+e0/1c8>
    e: 73 ea jae fffffffa <_EIP+0xfffffffa> c012cae0 <block_truncate_page+cc/1c8>
    Code; c012caf6 <block_truncate_page+e2/1c8>
    10: 8b 54 24 2c movl 0x2c(%esp,1),%edx

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