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Unable to handle kernel NULL pointer dereference

  1. Unable to handle kernel NULL pointer dereference

    Hi, we have a very old Red Hat 6.0 (hedwig) server with kernel
    2.2.5-15smp. It froze and was then rebooted. I found the following
    error in /var/spool/messages repeated 8x with different values. The 8
    occurances of this error all happened withing 1 second:

    Apr 17 11:29:29 warden kernel: Unable to handle kernel NULL pointer
    dereference at virtual address 00000008
    Apr 17 11:29:29 warden kernel: current->tss.cr3 = 00101000, %cr3 =
    00101000
    Apr 17 11:29:29 warden kernel: *pde = 00000000
    Apr 17 11:29:29 warden kernel: Oops: 0000
    Apr 17 11:29:29 warden kernel: CPU: 0
    Apr 17 11:29:30 warden kernel: EIP: 0010:[exit_mmap+136/264]
    Apr 17 11:29:30 warden kernel: EFLAGS: 00010202
    Apr 17 11:29:30 warden kernel: eax: 00000000 ebx: c9c8dd20 ecx:
    c9c8d020 edx: 00000000
    Apr 17 11:29:30 warden kernel: esi: 40000000 edi: c554d360 ebp:
    00012000 esp: cbd77ed4
    Apr 17 11:29:30 warden kernel: ds: 0018 es: 0018 ss: 0018
    Apr 17 11:29:30 warden kernel: Process sh (pid: 27648, process nr:
    116, stackpage=cbd77000)
    Apr 17 11:29:30 warden kernel: Stack: cbd76000 cbd77f10 c9c8d020
    c011439c c554d360 c554d360 c554d360 c0118f2d
    Apr 17 11:29:30 warden kernel: c554d360 cbd76000 0000000b
    0000000b cbd77fbc cbd76000 cbd76000 cbd77fbc
    Apr 17 11:29:30 warden kernel: c0108a25 0000000b cbd76000
    40037848 40013bc8 cbd76000 cbd77f3c c6ba18cc
    Apr 17 11:29:30 warden kernel: Call Trace: [mmput+28/52] [do_exit
    +241/724] [do_signal+561/752] [force_sig_info+119/132] [force_sig
    +17/24] [do_page_fault+409/796] [error_code+45/52]
    Apr 17 11:29:30 warden kernel: [signal_return+20/24]
    Apr 17 11:29:30 warden kernel: Code: 8b 40 08 ff 80 90 00 00 00 8b 53
    20 85 d2 74 09 8b 43 24 89

    The server has since been OK with no repeat of this error.

    Should I be concerned? Many thanks, Pete.


  2. Re: Unable to handle kernel NULL pointer dereference

    peterharding@yahoo.com writes:

    > Hi, we have a very old Red Hat 6.0 (hedwig) server with kernel
    > 2.2.5-15smp. It froze and was then rebooted. I found the following
    > error in /var/spool/messages repeated 8x with different values. The 8
    > occurances of this error all happened withing 1 second:
    >
    > Apr 17 11:29:29 warden kernel: Unable to handle kernel NULL pointer
    > dereference at virtual address 00000008

    ....
    > The server has since been OK with no repeat of this error.
    >
    > Should I be concerned? Many thanks, Pete.


    Only if kernel errors or getting hacked is a problem for you.

  3. Re: Unable to handle kernel NULL pointer dereference

    On Thu, 19 Apr 2007 09:19:18 -0400, Dan Espen wrote:

    > peterharding@yahoo.com writes:
    >
    >> Hi, we have a very old Red Hat 6.0 (hedwig) server with kernel
    >> 2.2.5-15smp. It froze and was then rebooted. I found the following
    >> error in /var/spool/messages repeated 8x with different values. The 8
    >> occurances of this error all happened withing 1 second:
    >>
    >> Apr 17 11:29:29 warden kernel: Unable to handle kernel NULL pointer
    >> dereference at virtual address 00000008

    > ...
    >> The server has since been OK with no repeat of this error.
    >>
    >> Should I be concerned? Many thanks, Pete.

    >
    > Only if kernel errors or getting hacked is a problem for you.


    Thanks for providing such a useful, deep, insightful piece of
    knowledge. Go home now and have some rest, lest so much altruism and
    intellectual activity get the better of you.

    To the OP:

    I have been going through something similar myself, and it was
    due to bad memory. This does not guarantee that that's what is affecting
    your machine, but it is certainly worth a try.


  4. Re: Unable to handle kernel NULL pointer dereference

    Ivar Rosquist writes:

    > On Thu, 19 Apr 2007 09:19:18 -0400, Dan Espen wrote:
    >
    >> peterharding@yahoo.com writes:
    >>
    >>> Hi, we have a very old Red Hat 6.0 (hedwig) server with kernel
    >>> 2.2.5-15smp. It froze and was then rebooted. I found the following
    >>> error in /var/spool/messages repeated 8x with different values. The 8
    >>> occurances of this error all happened withing 1 second:
    >>>
    >>> Apr 17 11:29:29 warden kernel: Unable to handle kernel NULL pointer
    >>> dereference at virtual address 00000008

    >> ...
    >>> The server has since been OK with no repeat of this error.
    >>>
    >>> Should I be concerned? Many thanks, Pete.

    >>
    >> Only if kernel errors or getting hacked is a problem for you.

    >
    > Thanks for providing such a useful, deep, insightful piece of
    > knowledge. Go home now and have some rest, lest so much altruism and
    > intellectual activity get the better of you.
    >
    > To the OP:
    >
    > I have been going through something similar myself, and it was
    > due to bad memory. This does not guarantee that that's what is affecting
    > your machine, but it is certainly worth a try.


    So you think running RH 6.0 is a good idea?

  5. Re: Unable to handle kernel NULL pointer dereference

    On Thu, 19 Apr 2007 10:08:03 -0400, Dan Espen wrote:

    > Ivar Rosquist writes:
    >
    >> On Thu, 19 Apr 2007 09:19:18 -0400, Dan Espen wrote:
    >>
    >>> peterharding@yahoo.com writes:
    >>>
    >>>> Hi, we have a very old Red Hat 6.0 (hedwig) server with kernel
    >>>> 2.2.5-15smp. It froze and was then rebooted. I found the following
    >>>> error in /var/spool/messages repeated 8x with different values. The 8
    >>>> occurances of this error all happened withing 1 second:
    >>>>
    >>>> Apr 17 11:29:29 warden kernel: Unable to handle kernel NULL pointer
    >>>> dereference at virtual address 00000008
    >>> ...
    >>>> The server has since been OK with no repeat of this error.
    >>>>
    >>>> Should I be concerned? Many thanks, Pete.
    >>>
    >>> Only if kernel errors or getting hacked is a problem for you.

    >>
    >> Thanks for providing such a useful, deep, insightful piece of
    >> knowledge. Go home now and have some rest, lest so much altruism and
    >> intellectual activity get the better of you.
    >>
    >> To the OP:
    >>
    >> I have been going through something similar myself, and it was
    >> due to bad memory. This does not guarantee that that's what is
    >> affecting your machine, but it is certainly worth a try.

    >
    > So you think running RH 6.0 is a good idea?


    Where in your original posting is that? What makes you think that
    you can guess what I think about RH 6.0?

    You replied in an arrogant and useless way to somebody asking for
    help. Like I said, stay at home and come back if and when you have
    anything constructive to contribute.

  6. Re: Unable to handle kernel NULL pointer dereference

    Ivar Rosquist writes:

    > On Thu, 19 Apr 2007 10:08:03 -0400, Dan Espen wrote:
    >
    >> Ivar Rosquist writes:
    >>
    >>> On Thu, 19 Apr 2007 09:19:18 -0400, Dan Espen wrote:
    >>>
    >>>> peterharding@yahoo.com writes:
    >>>>
    >>>>> Hi, we have a very old Red Hat 6.0 (hedwig) server with kernel
    >>>>> 2.2.5-15smp. It froze and was then rebooted. I found the following
    >>>>> error in /var/spool/messages repeated 8x with different values. The 8
    >>>>> occurances of this error all happened withing 1 second:
    >>>>>
    >>>>> Apr 17 11:29:29 warden kernel: Unable to handle kernel NULL pointer
    >>>>> dereference at virtual address 00000008
    >>>> ...
    >>>>> The server has since been OK with no repeat of this error.
    >>>>>
    >>>>> Should I be concerned? Many thanks, Pete.
    >>>>
    >>>> Only if kernel errors or getting hacked is a problem for you.
    >>>
    >>> Thanks for providing such a useful, deep, insightful piece of
    >>> knowledge. Go home now and have some rest, lest so much altruism and
    >>> intellectual activity get the better of you.
    >>>
    >>> To the OP:
    >>>
    >>> I have been going through something similar myself, and it was
    >>> due to bad memory. This does not guarantee that that's what is
    >>> affecting your machine, but it is certainly worth a try.

    >>
    >> So you think running RH 6.0 is a good idea?

    >
    > Where in your original posting is that? What makes you think that
    > you can guess what I think about RH 6.0?
    >
    > You replied in an arrogant and useless way to somebody asking for
    > help. Like I said, stay at home and come back if and when you have
    > anything constructive to contribute.


    The OP says pretty clearly that he's running RH 6.0.

    You see a memory problem, I see a very old OS problem.

    The memory may or may not be bad, but running that OS
    will still be a problem whether the memory is bad or not.

    Any way, sarcasm is a fine art, you should learn to appreciate
    it. Whether the OP appreciated it, we haven't heard
    but he'd do well to pay heed.

  7. Re: Unable to handle kernel NULL pointer dereference

    On Apr 19, 10:08 am, Dan Espen
    wrote:
    > So you think running RH 6.0 is a good idea?


    It isn't possible to give an authoritative answer on that one with
    the
    information provided by the OP. We have no idea what kind of a
    network the machine is on, or if it is on any network at all. New
    and better are not interchangable concepts without a context.

    Steve



  8. Re: Unable to handle kernel NULL pointer dereference

    Dan Espen wrote:
    >Any way, sarcasm is a fine art, you should learn to appreciate


    You should learn how to use it. All you've done is come off
    like a total idiot totally lacking in wit.

    --
    Floyd L. Davidson
    Ukpeagvik (Barrow, Alaska) floyd@apaflo.com

  9. Re: Unable to handle kernel NULL pointer dereference

    floyd@apaflo.com (Floyd L. Davidson) writes:

    > Dan Espen wrote:
    >>Any way, sarcasm is a fine art, you should learn to appreciate

    >
    > You should learn how to use it. All you've done is come off
    > like a total idiot totally lacking in wit.



    Well, before I get everyone yelling at me,
    I guess I'd better admit my mistake.

    Sorry, seemed funny to me.

  10. Re: Unable to handle kernel NULL pointer dereference

    Dan Espen wrote:
    >floyd@apaflo.com (Floyd L. Davidson) writes:
    >
    >> Dan Espen wrote:
    >>>Any way, sarcasm is a fine art, you should learn to appreciate

    >>
    >> You should learn how to use it. All you've done is come off
    >> like a total idiot totally lacking in wit.

    >
    >Well, before I get everyone yelling at me,
    >I guess I'd better admit my mistake.
    >
    >Sorry, seemed funny to me.


    Apologies on Usenet are so rare as to be a collector's item.

    Your status of high esteem is more than restored.

    --
    Floyd L. Davidson
    Ukpeagvik (Barrow, Alaska) floyd@apaflo.com

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