coll/tuned: Add NULL check to prevent segfault

Signed-off-by: William Zhang <wilzhang@amazon.com>

cr https://code.amazon.com/reviews/CR-23837553

ompi/mca/coll/tuned/coll_tuned_dynamic_file.c

@@ -142,6 +142,10 @@ int ompi_coll_tuned_read_rules_config_file (char *fname, ompi_coll_alg_rule_t**
         OPAL_OUTPUT((ompi_coll_tuned_stream, "Read communicator count %d for dynamic rule for collective ID %d\n", NCS, CI));
         alg_p->n_com_sizes = NCS;
         alg_p->com_rules = ompi_coll_tuned_mk_com_rules (NCS, CI);
+        if (NULL == alg_p->com_rules) {
+            OPAL_OUTPUT((ompi_coll_tuned_stream,"Cannot allocate com rules for file [%s]\n", fname));
+            goto on_file_error;
+        }
 
         for (ncs=0;ncs<NCS;ncs++) {	/* for each comm size */
 
@@ -164,6 +168,10 @@ int ompi_coll_tuned_read_rules_config_file (char *fname, ompi_coll_alg_rule_t**
                          NMS, CI, CS));
             com_p->n_msg_sizes = NMS;
             com_p->msg_rules = ompi_coll_tuned_mk_msg_rules (NMS, CI, ncs, CS);
+            if (NULL == com_p->msg_rules) {
+                OPAL_OUTPUT((ompi_coll_tuned_stream,"Cannot allocate msg rules for file [%s]\n", fname));
+                goto on_file_error;
+            }
 
             msg_p = com_p->msg_rules;