Jail causes host to reboot

Niklaas Baudet von Gersdorff niklaas at kulturflatrate.net
Tue Sep 8 18:32:09 UTC 2015

On 08/09/15 20:11, Kozlov Sergey wrote:
> Do you have a dumpdev configured in your rc.conf?

Nope, unfortunately, I don't. Am I right that I should also read
https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html ?

> Do you see any files in /var/crash? If yes - then it's a kernel panic
> and you have the coredump. Please read this article
> <https://www.freebsd.org/doc/en_US.ISO8859-1/articles/problem-reports/index.html>
> and submit a PR.

$ ls -la /var/crash
total 4
drwxr-x---   2 root  wheel   3 Jul 11  2014 .
drwxr-xr-x  24 root  wheel  24 Sep  2 12:23 ..
-rw-r--r--   1 root  wheel   5 Jan 16  2014 minfree

$ cat /var/crash/minfree

Does this mean that it wasn't a kernel panic at all? Or isn't there
something worth noticing because I don't have dumpdev configured?

I'm afraid that I can't remember another change that I made to the jail
that caused it to crash. But, up to now, the only thing I can remember I
did was upgrading net/syncthing.

> I know that it can be a difficult path to take, but please do that.
> Having a kernel panic in a -RELEASE version is rare and your particular
> circumstances are very valuable, cause you can reliably reproduce the bug.
> Don't be a free rider, make FreeBSD better ;)

I definitely want to further investigate the problem and keep everyone
updated about it. It's just that I need some help to do that, so your
reply is very much appreciated. I'm definitely not a free rider. ;-)

So far, I haven't started the jail again since it has continuously
broken my system. (I'm scared.) I will configure dumpdev first and after
that I'll start the jail. I'll keep you updated.

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