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Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket

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Mathias Krause <minipli@googlemail.com> writes:
> On 30 September 2015 at 15:25, Rainer Weikusat
> <rweikusat@mobileactivedefense.com> wrote:
>> Mathias Krause <minipli@googlemail.com> writes:
>>> On 30 September 2015 at 12:56, Rainer Weikusat <rweikusat@mobileactivedefense.com> wrote:
>>>> In case you want some information on this: This is a kernel warning I
>>>> could trigger (more than once) on the single day I could so far spend
>>>> looking into this (3.2.54 kernel):
>>>>
>>>> Sep 15 19:37:19 doppelsaurus kernel: WARNING: at lib/list_debug.c:53 list_del+0x9/0x30()
>>>> Sep 15 19:37:19 doppelsaurus kernel: Hardware name: 500-330nam
>>>> Sep 15 19:37:19 doppelsaurus kernel: list_del corruption. prev->next should be ffff88022c38f078, but was dead000000100100
>>>> [snip]
>>>
>>> Is that with Jason's patch or a vanilla v3.2.54?
>>
>> That's a kernel warning which occurred repeatedly (among other "link
>> pointer disorganization" warnings) when I tested the "program with
>> unknown behaviour" you wrote with the kernel I'm currently supporting a
>> while ago (as I already wrote in the original mail).
>
> So I assume Jason's patch is not included in your kernel.  Then those
> messages are expected; expected even on kernels as old as v2.6.27.
> Can you re-try with Jason's patch applied?

If something needs to be unregistered here (which I don't claim to
know but someone should), the corresponding code would need to be added
to the unix_dgram_disconnected function (as was already pointed
out).
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Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Mathias Krause <minipli@googlemail.com> - 2015-09-29 20:20 +0200
  Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Jason Baron <jbaron@akamai.com> - 2015-09-29 21:20 +0200
    Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Mathias Krause <minipli@googlemail.com> - 2015-09-30 08:00 +0200
      Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Michal Kubecek <mkubecek@suse.cz> - 2015-09-30 09:40 +0200
        Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Jason Baron <jbaron@akamai.com> - 2015-10-01 05:00 +0200
      Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2015-09-30 13:00 +0200
        Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Mathias Krause <minipli@googlemail.com> - 2015-09-30 14:00 +0200
          Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2015-09-30 15:30 +0200
            Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Mathias Krause <minipli@googlemail.com> - 2015-09-30 15:40 +0200
              Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2015-09-30 16:00 +0200
      Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Jason Baron <jbaron@akamai.com> - 2015-10-01 04:50 +0200
        Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2015-10-01 12:40 +0200
          Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2015-10-01 14:20 +0200
            Re: List corruption on epoll_ctl(EPOLL_CTL_DEL) an AF_UNIX socket Rainer Weikusat <rweikusat@mobileactivedefense.com> - 2015-10-01 15:00 +0200

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