OS-4825 cgroup user agent should be launched from the kernel
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 /*
  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
+ * Copyright 2016 Joyent, Inc.
  */
 
 /*
  * Contracts
  * ---------

@@ -285,11 +286,14 @@
     ctflags_t flags, proc_t *author, int canfail)
 {
         avl_index_t where;
         klwp_t *curlwp = ttolwp(curthread);
 
-        ASSERT(author == curproc);
+        /*
+         * It's possible that author is not curproc if the zone is creating
+         * a new process as a child of zsched.
+         */
 
         mutex_init(&ct->ct_lock, NULL, MUTEX_DEFAULT, NULL);
         mutex_init(&ct->ct_reflock, NULL, MUTEX_DEFAULT, NULL);
         mutex_init(&ct->ct_evtlock, NULL, MUTEX_DEFAULT, NULL);
         ct->ct_id = id_alloc(contract_ids);