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    SubjectOops in 2.2.12

    Hi,

    I encountered the following Kernel Crash, running kernel 2.2.12 on a
    486/DX2 with 8 Mb RAM. I was trying to download a big file over ftp (from
    local network, `ne' driver) to an ext2 partion mounted from /dev/hdb1. The
    crash occured when about 170 Mb was downloaded. I were returned to the
    shell, but just after (trying to log in at another vt, the Kernel Panic
    occured.).

    The IDE interface card used is an "Promise 2300+" dual IDE interface card
    (one VL bus ide and one ISA ide. The harddisk(s) in action was connected
    to the VL bus IDE.

    I experienced the crash once before, but didn't have the change to write
    the oops info down. I was crash-testing the same partion (/dev/hdb1) by
    doing cat /dev/zero > a_file_name on that partition. It crashed at about
    870 Mb written. The file system was corrupted after reboot.

    ksymoops 0.7c on i486 2.2.12. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.2.12/ (default)
    -m /mnt/ch_root/usr/src/linux/System.map (specified)

    Warning (compare_ksyms_lsmod): module smbfs is in lsmod but not in ksyms, probably no symbols exported
    Unable to handle kernel NULL pointer dereference at virtual address 00000008
    current->tss.c3 = 004ef000, %cr3=004ef000
    *pde = 00000000
    Oops: 0000
    CPU: 0
    EIP: 0010:[<c011f9f0>]
    Using defaults from ksymoops -t elf32-i386 -a i386
    EFLAGS: 00010082
    eax: 0000004c ebx: c0364ed0 ecx: 00000000 edx: c0364f1x
    esi: c009e740 edi: 00000282 ebp: c01f6968 esp: c05d7eb8
    ds: 0018 es: 0018 ss: 0018
    Process ncftp (pid: 628, process nr: 15, stackpage=c05d7000)
    Call Trace: [<c01263d1>] [<c0126dcb>] [<c011b652>] [<c01208ba>]
    [<c0120a13>] [<c012124c>] [<c0154fbe]
    [<c012b3b8>] [<c012b98c>] [<c0123557>] [<c013a950>] [<c0107b78>]
    [<c010002b>]
    Code: 8b 69 08 81 fd 2b 2f c3 a5 0f 85 f1 00 00 00 8b 69 0c 85 ed

    >>EIP; c011f9f0 <kmem_cache_free+40/1a0> <=====
    Trace; c01263d1 <put_unused_buffer_head+21/60>
    Trace; c0126dcb <try_to_free_buffers+4b/90>
    Trace; c011b652 <shrink_mmap+e2/140>
    Trace; c01208ba <do_try_to_free_pages+2a/90>
    Trace; c0120a13 <try_to_free_pages+23/30>
    Trace; c012124c <__get_free_pages+7c/3f0>
    Trace; c012b3b8 <getname+18/a0>
    Trace; c012b98c <__namei+c/60>
    Trace; c0123557 <sys_utime+17/d0>
    Trace; c013a950 <ext2_file_write+0/670>
    Trace; c0107b78 <system_call+34/38>
    Trace; c010002b <startup_32+2b/11e>
    Code; c011f9f0 <kmem_cache_free+40/1a0>
    00000000 <_EIP>:
    Code; c011f9f0 <kmem_cache_free+40/1a0> <=====
    0: 8b 69 08 movl 0x8(%ecx),%ebp <=====
    Code; c011f9f3 <kmem_cache_free+43/1a0>
    3: 81 fd 2b 2f c3 a5 cmpl $0xa5c32f2b,%ebp
    Code; c011f9f9 <kmem_cache_free+49/1a0>
    9: 0f 85 f1 00 00 00 jne 100 <_EIP+0x100> c011faf0 <kmem_cache_free+140/1a0>
    Code; c011f9ff <kmem_cache_free+4f/1a0>
    f: 8b 69 0c movl 0xc(%ecx),%ebp
    Code; c011fa02 <kmem_cache_free+52/1a0>
    12: 85 ed testl %ebp,%ebp


    1 warning issued. Results may not be reliable.


    /Lars Christensen
    larsch@cs.auc.dk



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