From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Seiderer <ps.report@gmx.net>
Date: Mon, 11 Jan 2021 20:30:57 +0100
Subject: [Buildroot] random segmentation fault during built
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To: buildroot@busybox.net

Hello Bin,

On Mon, 11 Jan 2021 09:11:48 +0800, Bin Meng <bmeng.cn@gmail.com> wrote:

> Hi Peter,
>
> On Mon, Jan 11, 2021 at 12:04 AM Peter Seiderer <ps.report@gmx.net> wrote:
> >
> > Hello Bin,
> >
> > On Sun, 10 Jan 2021 21:57:45 +0800, Bin Meng <bmeng.cn@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > I see a random segmentation fault during the build of buildroot. For example,
> > >
> > > Makefile:13408: recipe for target 'install-pylibmountexecPYTHON' failed
> > > make[4]: *** [install-pylibmountexecPYTHON] Segmentation fault (core dumped)
> > > make[4]: *** Waiting for unfinished jobs....
> > >
> > > Type "make" for the 2nd time with nothing changed, or rarely a 3rd
> > > time, get a PASS build.
> > >
> > > This was observed by builds on Ubuntu 16.04 and Ubuntu 20.04 hosts.
> > > Any ideas of what could be wrong?
> >
> > In case the errors are at random packages/locations (and succeed on iteration)
> > check your hardware and/or memory, see e.g. [1]...
> >
> > Early versions of the AMD Ryzen CPU had heavy-load segfault bug, see [2]...
> >
> > Regards,
> > Peter
> >
> > [1] https://tldp.org/FAQ/sig11/html/index.html
> > [2] https://techreport.com/news/32459/amd-ships-revised-ryzen-cpus-with-a-compile-bug-fix/
>
> Thank you. I checked the above 2 links and suspect it's not related.
>
> The issue happens on one Intel Xeon CPU with a Ubuntu 16.04 and one
> Intel CORE i9 with a Ubuntu 20.04. The segmentation fault seems to
> happen randomly during package "make install" phase.

Back to the first question: random packages/locations or always at the same (or
similar) location? Always some python (related) package?

Which buildroot version? Mind to share your .config file?

Mind to enable core-dump ('ulimit -c unlimited') and take a look at the core
file?

Regards,
Peter

>
> Regards,
> Bin