When ipa trust-add is executed with --range-type ad-trust-posix,
the server tries to find the max uidnumber and max gidnumber
from AD domain controller.
The values are extracted from the entry
CN=<domain>,CN=ypservers,CN=ypServ30,CN=RpcServices,CN=System,<AD suffix>
in the msSFU30MaxUidNumber and msSFU30MaxGidNumber attributes.
msSFU30MaxUidNumber is required but not msSFU30MaxGidNumber.
In case msSFU30MaxGidNumber is missing, the code is currently assigning
a "None" value and later on evaluates the max between this value and
msSFU30MaxUidNumber. The max function cannot compare None and a list
of string and triggers an exception.
To avoid the exception, assign [b'0'] to max gid if msSFU30MaxGidNumber
is missing. This way, the comparison succeeds and max returns the
value from msSFU30MaxUidNumber.
Fixes: https://pagure.io/freeipa/issue/9310
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Florence Blanc-Renaud
07975b52c3