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Message-ID: <D2037365.41362%Shaun.Crampton@metaswitch.com>
Date: Wed, 26 Aug 2015 13:01:12 +0000
From: Shaun Crampton <Shaun.Crampton@...aswitch.com>
To: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: Peter White <Peter.White@...aswitch.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Chuck Ebbert <cebbert.lkml@...il.com>
Subject: Re: ip_rcv_finish() NULL pointer and possibly related Oopses
>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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