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Description of problem:
idmap_hash module works incorrectly when used with other backend modules

Version-Release number of selected component (if applicable):
samba 4.2

How reproducible:

Mapping is configured as 
        idmap config * : range = 100000-2139999999
        idmap config * : backend = hash
        idmap config DOM002 : range = 2140000000-4290000000
        idmap config DOM002 : backend = rid

Steps to Reproduce:
1. # wbinfo -i dom001+user1 <---- dom001
dom001+user1:*:1650596368:2140000513:user1:/home/user1:/bin/ksh
# wbinfo --uid-to-sid=1650596368
S-1-5-21-126432666-1270913926-3679153413-137744
# wbinfo --sid-to-name S-1-5-21-126432666-1270913926-3679153413-137744
DOM002+user1 1  <--- dom002
2.
3.

Actual results:


Expected results:
DOM002+user1 gets id from 214 range not below

Additional info:

Changing component, there is no samba4 in RHEL7 anymore only samba

In the global section add:

        idmap config * : range = 10000-20000
        idmap config * : backend = hash
        idmap config YOURDOMAIN : range = 30000-40000
        idmap config YOURDOMAIN : backend = rid

If you now get a unix ID for YOURDOMAIN, it should be from the range 30000-40000 but before fixing the issue it was in the range 10000-20000.

wbinfo -i YOURDOMAIN+user1

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2468.html