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Re: ip_rcv_finish() NULL pointer and possibly related Oopses

From Shaun Crampton <Shaun.Crampton@metaswitch.com>
Newsgroups linux.kernel
Subject Re: ip_rcv_finish() NULL pointer and possibly related Oopses
Date 2015-08-26 15:10 +0200
Message-ID <q1ICK-6BL-27@gated-at.bofh.it> (permalink)
References <q1Ez8-Dv-9@gated-at.bofh.it> <q1HwZ-4PL-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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>And the kernel thinks it's
>outside of any normal text section, so it does not try to dump any
>code from before the instruction pointer.
>
>   0:	48 8b 88 40 03 00 00 	mov    0x340(%rax),%rcx
>   7:	e8 1d dd dd ff       	callq  0xffffffffffdddd29
>   c:	5d                   	pop    %rbp
>   d:	c3                   	retq
>
>Did you write your own module loader or something?

We certainly didn't but CoreOS may have.  I've asked CoreOS if they know
what's going on.

Are there any extra diagnostics I can gather from a CoreOS system to help
figure out what's going on there?  Is there anything I can do to get more
useful diagnostics when one of these failures occur?  As noted, I can
reproduce the issue but it's expensive, requiring hundreds of VMs to
hammer away for an hour or so.

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Thread

ip_rcv_finish() NULL pointer and possibly related Oopses Shaun Crampton <Shaun.Crampton@metaswitch.com> - 2015-08-26 10:50 +0200
  Re: ip_rcv_finish() NULL pointer and possibly related Oopses Chuck Ebbert <cebbert.lkml@gmail.com> - 2015-08-26 14:00 +0200
    Re: ip_rcv_finish() NULL pointer and possibly related Oopses Shaun Crampton <Shaun.Crampton@metaswitch.com> - 2015-08-26 15:10 +0200
    Re: ip_rcv_finish() NULL pointer and possibly related Oopses Michael Marineau <michael.marineau@coreos.com> - 2015-08-26 23:00 +0200
      Re: ip_rcv_finish() NULL pointer and possibly related Oopses Eric Dumazet <eric.dumazet@gmail.com> - 2015-08-27 15:10 +0200
        Re: ip_rcv_finish() NULL pointer and possibly related Oopses Michael Marineau <michael.marineau@coreos.com> - 2015-08-27 18:20 +0200
          Re: ip_rcv_finish() NULL pointer and possibly related Oopses Michael Marineau <michael.marineau@coreos.com> - 2015-08-27 18:40 +0200
          Re: ip_rcv_finish() NULL pointer and possibly related Oopses Eric Dumazet <eric.dumazet@gmail.com> - 2015-08-27 18:40 +0200
          Re: ip_rcv_finish() NULL pointer and possibly related Oopses Michael Marineau <michael.marineau@coreos.com> - 2015-08-27 18:50 +0200
          Re: ip_rcv_finish() NULL pointer and possibly related Oopses David Miller <davem@davemloft.net> - 2015-08-27 18:50 +0200
        Re: ip_rcv_finish() NULL pointer and possibly related Oopses Shaun Crampton <Shaun.Crampton@metaswitch.com> - 2015-09-02 18:50 +0200
          Re: ip_rcv_finish() NULL pointer and possibly related Oopses Daniel Borkmann <daniel@iogearbox.net> - 2015-09-03 02:20 +0200
            Re: ip_rcv_finish() NULL pointer and possibly related Oopses Shaun Crampton <Shaun.Crampton@metaswitch.com> - 2015-09-03 10:20 +0200
              Re: ip_rcv_finish() NULL pointer and possibly related Oopses Daniel Borkmann <daniel@iogearbox.net> - 2015-09-03 11:10 +0200
                Re: ip_rcv_finish() NULL pointer and possibly related Oopses Shaun Crampton <Shaun.Crampton@metaswitch.com> - 2015-09-03 12:10 +0200
                Re: ip_rcv_finish() NULL pointer and possibly related Oopses Eric Dumazet <eric.dumazet@gmail.com> - 2015-09-03 14:20 +0200
                Re: ip_rcv_finish() NULL pointer and possibly related Oopses Shaun Crampton <Shaun.Crampton@metaswitch.com> - 2015-09-04 17:00 +0200

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