[Bug 204426] Processes terminating cannot access memory

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204426

--- Comment #67 from John Baldwin <jhb at FreeBSD.org> ---
Sorry for another possible hail mary, but I've noticed that many of your faults
are in the thread library.  There were several changes to libthr between 10.1
and 10.2.  They should all be bug fixes (in particular fixes to allow
applications to dlopen() an object that uses libthr).

If these changes to libthr are relevant then there are a few things to
investigate and/or try:

1) Can you run ldd on your dovecot and exim binaries to see if they are
directly linked against libthr?

2) Do you know if your binaries are loading any "plugins" (e.g. SASL auth
mechanisms, milters (I know postfix and sendmail can both use milters for
things like greylisting, etc.))?  If you are, are any of your plugins linked
against libthr?

If the answer to 1) is no, then the first thing to possibly try is to set
LD_PRELOAD=libthr.so.3 in the environment of the dovecot and exim binaries when
you start them up.  (If using rc.d scripts you can do this via foo_env
variables in rc.conf.)

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