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On Wed, 4 Jan 2017, Tobi wrote:

[New process 20844]
Program received signal SIGSEGV, Segmentation fault.
[Switching to process 20844]
0x00007ffff7203694 in _IO_vfprintf_internal (s=s@entry=0x7fffffffd710,
format=<optimized out>,
   format@entry=0x555555764938 "chroot(%s) failed: Bad address",
ap=ap@entry=0x7fffffffd970) at vfprintf.c:1635
1635              process_string_arg (((struct printf_spec *) NULL));

Does your script tries to chroot?
Do you have LMTP or Dovecot configured to chroot?
As Stephan asked, can you determine with process is spawned here?

The format string "chroot(%s) failed: Bad address" may stem from a Dovecot library.

- -- Steffen Kaiser
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