[erlang-questions] Erlang scheduler segfault at ffffffffffffffff

[Gabriele Santomaggio]

Thank you Mikael,

We run:

uname -a
Linux [x]  4.4.121-92.98-default #1 SMP Fri Oct 19 07:52:13 UTC 2018
(e4d85ce) x86_64 x86_64 x86_64 GNU/Linux

We will update the kernel.

-
Gabriele Santomaggio


Il giorno mar 21 mag 2019 alle ore 13:26 Mikael Pettersson <
mikpelinux@REDACTED> ha scritto:

> On Mon, May 20, 2019 at 9:20 PM Gabriele Santomaggio
> <g.santomaggio@REDACTED> wrote:
> >
> > Hi,
> > I am having the following the problem:
> >
> > 2019-05-06T10:46:16.413758+00:00 d98-f2-b3-c8-b8-65 kernel:
> [8649388.905125] ../mm/pgtable-generic.c:33: bad pmd
> ffff883eed530398(80000037db2008e7)
> > 2019-05-06T10:46:16.423251+00:00 d98-f2-b3-c8-b8-65 kernel:
> [8649388.915722] 34_scheduler[15882]: segfault at ffffffffffffffff ip
> 0000000040e97113 sp 00007fcffdb7ef78 error 5
> >
> > it causes a crash without erlang dump.
> >
> > HIPE is enabled, do you have an idea if is related in some way to hipe?
> >
> > notes:
> > 1 - Erlang version 20.2.2
> > 2 - 34_scheduler` is one of the erlang schedulers
>
> This is a kernel bug, plain and simple.  OTP and/or HiPE _might_ do
> something that triggers it, but that's just coincidental; a correct
> kernel must not crash due to (unprivileged) user-space actions.
>
> You don't say what kernel you're running, but you should consider
> upgrading it.
>
> (Long shot: may also be a bug in the C compiler used to compile the
> kernel, but that's extremely uncommon for vanilla distribution
> kernels.)
>


-- 
Gabriele Santomaggio
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