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    SubjectRe: Linux 2.4.21pre3-ac2
    * Alan Cox <alan@redhat.com>:
    > The skb_padto bug is quite ugly so people really want to be using ac2 not
    > ac1.

    I got an oops with that kernel on two different machines:

    ksymoops 2.4.8 on i686 2.4.21-pre3-ac2. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.4.21-pre3-ac2/ (default)
    -m /boot/System.map-2.4.21-pre3-ac2 (default)

    Warning: You did not tell me where to find symbol information. I will
    assume that the log matches the kernel and modules that are running
    right now and I'll use the default options above for symbol resolution.
    If the current kernel and/or modules do not match the log, you can get
    more accurate output by telling me the kernel version and where to find
    map, modules, ksyms etc. ksymoops -h explains the options.

    cs: IO port probe 0x0c00-0x0cff: clean.
    cs: IO port probe 0x0800-0x08ff: clean.
    cs: IO port probe 0x0100-0x04ff: excluding 0x220-0x22f 0x330-0x337 0x378-0x37f 0x388-0x38f 0x3c0-0x3df 0x4d0-0x4d7
    cs: IO port probe 0x0a00-0x0aff: clean.
    cs: memory probe 0xa0000000-0xa0ffffff: clean.
    ad1848: No ISAPnP cards found, trying standard ones...
    Unable to handle kernel NULL pointer dereference at virtual address 00000004
    c0132d7d
    *pde = 00000000
    Oops: 0002
    CPU: 0
    EIP: 0010:[<c0132d7d>] Not tainted
    Using defaults from ksymoops -t elf32-i386 -a i386
    EFLAGS: 00010246
    eax: 00000000 ebx: c117b874 ecx: c7cc8000 edx: c7cc805c
    esi: 00000000 edi: 00000000 ebp: c0271030 esp: c7cc9e40
    ds: 0018 es: 0018 ss: 0018
    Process apt-get (pid: 1352, stackpage=c7cc9000)
    Stack: 00000001 00000286 c898f420 c898f420 c898f420 c117b874 c013e66e c898f420
    c88b2e68 c117b874 000011d1 c0271030 c0131f0f c117b874 000001d2 c7cc8000
    000001c8 000001d2 00000020 00000020 000001d2 00000020 00000006 c0132153
    Call Trace: [<c013e66e>] [<c0131f0f>] [<c0132153>] [<c01321c6>] [<c0133067>]
    [<c01332f3>] [<c012dd70>] [<c015f5d9>] [<c013a173>] [<c0107307>]
    Code: 89 58 04 89 03 89 53 04 89 59 5c 89 73 0c ff 41 68 eb bf 0f


    >>EIP; c0132d7d <__free_pages_ok+27d/2a0> <=====

    >>ebx; c117b874 <_end+e88fbc/c9937a8>
    >>ecx; c7cc8000 <_end+79d5748/c9937a8>
    >>edx; c7cc805c <_end+79d57a4/c9937a8>
    >>ebp; c0271030 <contig_page_data+b0/340>
    >>esp; c7cc9e40 <_end+79d7588/c9937a8>

    Trace; c013e66e <try_to_free_buffers+8e/100>
    Trace; c0131f0f <shrink_cache+21f/310>
    Trace; c0132153 <shrink_caches+63/a0>
    Trace; c01321c6 <try_to_free_pages_zone+36/50>
    Trace; c0133067 <balance_classzone+57/1f0>
    Trace; c01332f3 <__alloc_pages+f3/190>
    Trace; c012dd70 <generic_file_write+370/760>
    Trace; c015f5d9 <ext3_file_write+39/d0>
    Trace; c013a173 <sys_write+a3/140>
    Trace; c0107307 <system_call+33/38>

    Code; c0132d7d <__free_pages_ok+27d/2a0>
    00000000 <_EIP>:
    Code; c0132d7d <__free_pages_ok+27d/2a0> <=====
    0: 89 58 04 mov %ebx,0x4(%eax) <=====
    Code; c0132d80 <__free_pages_ok+280/2a0>
    3: 89 03 mov %eax,(%ebx)
    Code; c0132d82 <__free_pages_ok+282/2a0>
    5: 89 53 04 mov %edx,0x4(%ebx)
    Code; c0132d85 <__free_pages_ok+285/2a0>
    8: 89 59 5c mov %ebx,0x5c(%ecx)
    Code; c0132d88 <__free_pages_ok+288/2a0>
    b: 89 73 0c mov %esi,0xc(%ebx)
    Code; c0132d8b <__free_pages_ok+28b/2a0>
    e: ff 41 68 incl 0x68(%ecx)
    Code; c0132d8e <__free_pages_ok+28e/2a0>
    11: eb bf jmp ffffffd2 <_EIP+0xffffffd2>
    Code; c0132d90 <__free_pages_ok+290/2a0>
    13: 0f 00 00 sldtl (%eax)

    <1>Unable to handle kernel NULL pointer dereference at virtual address 00000004
    c0132d7d
    *pde = 00000000
    Oops: 0002
    CPU: 0
    EIP: 0010:[<c0132d7d>] Not tainted
    EFLAGS: 00010246
    eax: 00000000 ebx: c10cc138 ecx: c7cc8000 edx: c7cc805c
    esi: 00000000 edi: 00000000 ebp: 00000000 esp: c7cc9c64
    ds: 0018 es: 0018 ss: 0018
    Process apt-get (pid: 1352, stackpage=c7cc9000)
    Stack: 0000002f 00000082 00000082 c02d93b4 00000020 00000000 c01911b3 c02d93b4
    00000000 c9ed51a8 00004000 00000001 c0129027 c10cc138 00000000 00000001
    cbf7ef00 c10cc138 08400000 c436a084 0806e000 00000000 c012787b cb0887a0
    Call Trace: [<c01911b3>] [<c0129027>] [<c012787b>] [<c012a769>] [<c01171b7>]
    [<c011c09f>] [<c0107992>] [<c0114ad4>] [<c01643d2>] [<c016b21b>] [<c016a896>]
    [<c016b21b>] [<c016a896>] [<c0114830>] [<c01073f8>] [<c0132d7d>] [<c013e66e>]
    [<c0131f0f>] [<c0132153>] [<c01321c6>] [<c0133067>] [<c01332f3>] [<c012dd70>]
    [<c015f5d9>] [<c013a173>] [<c0107307>]
    Code: 89 58 04 89 03 89 53 04 89 59 5c 89 73 0c ff 41 68 eb bf 0f


    >>EIP; c0132d7d <__free_pages_ok+27d/2a0> <=====

    >>ebx; c10cc138 <_end+dd9880/c9937a8>
    >>ecx; c7cc8000 <_end+79d5748/c9937a8>
    >>edx; c7cc805c <_end+79d57a4/c9937a8>
    >>esp; c7cc9c64 <_end+79d73ac/c9937a8>

    Trace; c01911b3 <poke_blanked_console+53/70>
    Trace; c0129027 <zap_pte_range+f7/120>
    Trace; c012787b <zap_page_range+8b/f0>
    Trace; c012a769 <exit_mmap+b9/160>
    Trace; c01171b7 <mmput+47/a0>
    Trace; c011c09f <do_exit+8f/240>
    Trace; c0107992 <die+72/80>
    Trace; c0114ad4 <do_page_fault+2a4/4cf>
    Trace; c01643d2 <ext3_mark_iloc_dirty+42/70>
    Trace; c016b21b <journal_dirty_metadata+17b/210>
    Trace; c016a896 <do_get_write_access+296/520>
    Trace; c016b21b <journal_dirty_metadata+17b/210>
    Trace; c016a896 <do_get_write_access+296/520>
    Trace; c0114830 <do_page_fault+0/4cf>
    Trace; c01073f8 <error_code+34/3c>
    Trace; c0132d7d <__free_pages_ok+27d/2a0>
    Trace; c013e66e <try_to_free_buffers+8e/100>
    Trace; c0131f0f <shrink_cache+21f/310>
    Trace; c0132153 <shrink_caches+63/a0>
    Trace; c01321c6 <try_to_free_pages_zone+36/50>
    Trace; c0133067 <balance_classzone+57/1f0>
    Trace; c01332f3 <__alloc_pages+f3/190>
    Trace; c012dd70 <generic_file_write+370/760>
    Trace; c015f5d9 <ext3_file_write+39/d0>
    Trace; c013a173 <sys_write+a3/140>
    Trace; c0107307 <system_call+33/38>

    Code; c0132d7d <__free_pages_ok+27d/2a0>
    00000000 <_EIP>:
    Code; c0132d7d <__free_pages_ok+27d/2a0> <=====
    0: 89 58 04 mov %ebx,0x4(%eax) <=====
    Code; c0132d80 <__free_pages_ok+280/2a0>
    3: 89 03 mov %eax,(%ebx)
    Code; c0132d82 <__free_pages_ok+282/2a0>
    5: 89 53 04 mov %edx,0x4(%ebx)
    Code; c0132d85 <__free_pages_ok+285/2a0>
    8: 89 59 5c mov %ebx,0x5c(%ecx)
    Code; c0132d88 <__free_pages_ok+288/2a0>
    b: 89 73 0c mov %esi,0xc(%ebx)
    Code; c0132d8b <__free_pages_ok+28b/2a0>
    e: ff 41 68 incl 0x68(%ecx)
    Code; c0132d8e <__free_pages_ok+28e/2a0>
    11: eb bf jmp ffffffd2 <_EIP+0xffffffd2>
    Code; c0132d90 <__free_pages_ok+290/2a0>
    13: 0f 00 00 sldtl (%eax)


    1 warning issued. Results may not be reliable.

    --
    Ralf Hildebrandt (Im Auftrag des Referat V a) Ralf.Hildebrandt@charite.de
    Charite Campus Mitte Tel. +49 (0)30-450 570-155
    Referat V a - Kommunikationsnetze - Fax. +49 (0)30-450 570-916
    Why you can't find your system administrators:
    (S)he's catching twenty winks under the floorboards, tread gingerly.

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