kernel: add missing NULL checks on allocation paths

kernel/manager/throne_tracker.c

@@ -143,6 +143,10 @@ FILLDIR_RETURN_TYPE my_actor(struct dir_context *ctx, const char *name, int name
                 }
             } else {
                 struct apk_path_hash *apk_data = kzalloc(sizeof(struct apk_path_hash), GFP_KERNEL);
+                if (!apk_data) {
+                    pr_err("Failed to allocate apk_path_hash for %s\n", dirpath);
+                    return FILLDIR_ACTOR_CONTINUE;
+                }
                 apk_data->hash = hash;
                 apk_data->exists = true;
                 list_add_tail(&apk_data->list, &apk_path_hash_list);

kernel/selinux/sepolicy.c

@@ -586,9 +586,24 @@ static bool add_filename_trans(struct policydb *db, const char *s, const char *t
 
     if (trans == NULL) {
         trans = (struct filename_trans_datum *)kcalloc(1, sizeof(*trans), GFP_KERNEL);
+        if (!trans) {
+            pr_err("add_filename_trans: alloc filename_trans_datum failed\n");
+            return false;
+        }
         struct filename_trans_key *new_key = (struct filename_trans_key *)kzalloc(sizeof(*new_key), GFP_KERNEL);
+        if (!new_key) {
+            pr_err("add_filename_trans: alloc filename_trans_key failed\n");
+            kfree(trans);
+            return false;
+        }
         *new_key = key;
         new_key->name = kstrdup(key.name, GFP_KERNEL);
+        if (!new_key->name) {
+            pr_err("add_filename_trans: kstrdup name failed\n");
+            kfree(new_key);
+            kfree(trans);
+            return false;
+        }
         trans->next = last;
         trans->otype = def->value;
         hashtab_insert(&db->filename_trans, new_key, trans, filenametr_key_params);