Description of problem:

Up until recently, SELinux boolean httpd_dbus_sssd enabled Apache (httpd_t) dbus send_msg SSSD (sssd_t). Now it leads to org.freedesktop.DBus.Error.AccessDenied and USER_AVC being logged.

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

dbus-1.10.6-1.fc23.x86_64
kernel-4.3.3-300.fc23.x86_64
selinux-policy-targeted-3.13.1-158.fc23.noarch

How reproducible:

Deterministic.

Steps to Reproduce:
1. Configure SSSD (presumably IPA-enrolled) with ifp (D-Bus), start it.
2. Attempt to run dbus-send --print-reply --system --dest=org.freedesktop.sssd.infopipe /org/freedesktop/sssd/infopipe org.freedesktop.sssd.infopipe.GetUserAttr string:bob31482 array:string:gecos,mail as type httpd_t (since that's what mod_lookup_identity will do)

Actual results:

Error org.freedesktop.DBus.Error.AccessDenied: An SELinux policy prevents this sender from sending this message to this recipient, 0 matched rules; type="method_call", sender=":1.74" (uid=0 pid=21742 comm="dbus-send --print-reply --system --dest=org.freede") interface="org.freedesktop.sssd.infopipe" member="GetUserAttr" error name="(unset)" requested_reply="0" destination="org.freedesktop.sssd.infopipe" (uid=0 pid=15495 comm="/usr/libexec/sssd/sssd_ifp --uid 0 --gid 0 --debug")

and

type=USER_AVC msg=audit(1452777868.145:657): pid=685 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc:  denied  { send_msg } for msgtype=method_call interface=org.freedesktop.sssd.infopipe member=GetUserAttr dest=org.freedesktop.sssd.infopipe spid=21742 tpid=15495 scontext=unconfined_u:system_r:httpd_t:s0 tcontext=system_u:system_r:sssd_t:s0 tclass=dbus  exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'

in /var/log/audit/audit.log.

Expected results:

method return time=1452777855.573643 sender=:1.45 -> destination=:1.73 serial=5 reply_serial=2
   array [
      dict entry(
         string "gecos"
         variant             array [
               string "Robert Chase"
            ]
      )
      dict entry(
         string "mail"
         variant             array [
               string "bob31482"
            ]
      )
   ]

Additional info:

# sesearch -C --allow -s httpd_t -t sssd_tFound 7 semantic av rules:
   allow nsswitch_domain sssd_t : unix_stream_socket connectto ; 
   allow nsswitch_domain sssd_t : key { view read write search link setattr create } ; 
   allow domain domain : key { search link } ; 
ET allow httpd_t sssd_t : dbus send_msg ; [ httpd_dbus_sssd ]
DT allow httpd_t domain : process getpgid ; [ httpd_run_stickshift ]
ET allow domain domain : fd use ; [ domain_fd_use ]
DT allow daemon daemon : unix_stream_socket connectto ; [ daemons_enable_cluster_mode ]

which is exactly the same as on Fedora 22 with selinux-policy-3.13.1-128.21.fc22.noarch.