[erlang-questions] Erlang initiated kernel panic on OSX

Loïc Hoguin <>
Mon Nov 26 22:31:20 CET 2012


Someone confirmed it on IRC. This is the new Alt+F4!

On 11/26/2012 10:29 PM, Briggs wrote:
> All built using MacPorts. 3 separate machines. All built from source.
>
> On Nov 26, 2012, at 4:20 PM, Konstantin Tcepliaev <
> <mailto:>> wrote:
>
>> Hello,
>> Just curious: how did you obtain the binaries for Erlang VM?
>> Homebrew/MacPorts/ESL build/compiled by yourself from source/whatever?
>> I mean, I've been using Erlang R14B04 to R15B02, from Homebrew and
>> built by myself, on OSX 10.6 to 10.8.2, and never had any such problems.
>> --
>> Konstantin
>> 27.11.2012, 01:02, "
>> <mailto:>" <
>> <mailto:>>:
>>> Don't get me wrong, I have no doubts that it's an OS X bug. But,
>>> getting that fixed via Apple is next to impossible. I am not sure of
>>> the mechanism as to why it crashes the OS, but it does. It is
>>> reproducible. I was just hoping someone might know how to patch
>>> Erlang to help avoid the OS X bug as it's really irritating.
>>> If anyone is curious you can see that the process that caused the
>>> panic was named "beam.smp":
>>> Interval Since Last Panic Report: 2399141 sec
>>> Panics Since Last Report:          1
>>> Anonymous UUID:                    1C24E5B9-05B7-8082-2863-4E5C3ECA6AEC
>>> Thu Nov 15 11:44:13 2012
>>> panic(cpu 2 caller 0xffffff8006d1fdca): "negative open count (c, 16,
>>> 3)"@/SourceCache/xnu/xnu-2050.18.24/bsd/miscfs/specfs/spec_vnops.c:1813
>>> Backtrace (CPU 2), Frame : Return Address
>>> 0xffffff80f7e1bbe0 : 0xffffff8006c1d626
>>> 0xffffff80f7e1bc50 : 0xffffff8006d1fdca
>>> 0xffffff80f7e1bc90 : 0xffffff8006d24c56
>>> 0xffffff80f7e1bce0 : 0xffffff8006d11c96
>>> 0xffffff80f7e1bd20 : 0xffffff8006d094af
>>> 0xffffff80f7e1bd50 : 0xffffff8006d08645
>>> 0xffffff80f7e1bda0 : 0xffffff8006f4c56c
>>> 0xffffff80f7e1be10 : 0xffffff8006f4cae6
>>> 0xffffff80f7e1be50 : 0xffffff8006f5697b
>>> 0xffffff80f7e1bec0 : 0xffffff8006c39cc9
>>> 0xffffff80f7e1bef0 : 0xffffff8006c3c7c8
>>> 0xffffff80f7e1bf20 : 0xffffff8006c3c63e
>>> 0xffffff80f7e1bf50 : 0xffffff8006c1b70d
>>> 0xffffff80f7e1bf90 : 0xffffff8006cb8163
>>> 0xffffff80f7e1bfb0 : 0xffffff8006cce4bc
>>> BSD process name corresponding to current thread: beam.smp
>>> Mac OS version:
>>> 12C60
>>> On Nov 26, 2012, at 3:51 PM, Max Lapshin <
>>> <mailto:>> wrote:
>>>
>>>> How erlang be guilty in killing kernel of unix OS? It isn't DOS
>>>> What is the exact mechanism of this Mac failure (and it is
>>>> definitely Mac failure, not erlang failure).
>>>>
>>>>
>>>> On Tue, Nov 27, 2012 at 12:28 AM, <
>>>> <mailto:>> wrote:
>>>>
>>>>     Back in March of 2010 it was reported that it was possible to
>>>>     initiate a kernel panic on OS X 10.6.2 with Erlang.
>>>>
>>>>     Does anyone know if there is a fix for this? This is still
>>>>     happening in OS X 10.8.2 with Erlang R15B02. I've had it happen
>>>>     on all three of my Macs when working in Emacs and killing an
>>>>     Erlang shell in a buffer in a non-clean way.
>>>>
>>>>     I know that the problem was reported to Apple but we know how
>>>>     that is.
>>>>
>>>>     Perhaps someone has some sort of patch that can be applied to
>>>>     Erlang that can stop it from exploiting this flaw?
>>>>
>>>>     Thanks for your time,
>>>>
>>>>
>>>>     Briggs
>>>>
>>>>
>>>>
>>>>
>>>>     The original thread
>>>>     (http://erlang.org/pipermail/erlang-questions/2010-March/050112.html)
>>>>     stated:
>>>>
>>>>
>>>>     Greetings,
>>>>
>>>>     Using Snow Leopard 10.6.2 and Erlang R13B04 it's possible to cause a
>>>>     kernel panic using the following steps:
>>>>
>>>>     1. Start new terminal window
>>>>     2. erl +K true -s crypto
>>>>     3. Cmd-W (close the terminal window without stopping erlang)
>>>>
>>>>     Alternatively, if you're running SL 10.6.2 and Erlang R13B03:
>>>>
>>>>     1. Start new terminal window
>>>>     2. erl +K true -s crypto
>>>>     3. Cmd-Q (quit the terminal app without stopping erlang)
>>>>
>>>>     This appears to work with either 32 or 64 bit builds of Erlang.
>>>>
>>>>
>>>>     Thanks,
>>>>
>>>>     D.
>>>>
>>>>
>>>>     _______________________________________________
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>>>>      <mailto:>
>>>>     http://erlang.org/mailman/listinfo/erlang-questions
>>>
>>> ,
>>>
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-- 
Loïc Hoguin
Erlang Cowboy
Nine Nines
http://ninenines.eu



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