From 4ef64c0af214ba8dab31e35a8d5434d782eb9fb8 Mon Sep 17 00:00:00 2001
From: Kevin Day <thekevinday@gmail.com>
Date: Tue, 22 Nov 2022 19:43:16 -0600
Subject: [PATCH] Security: Invalid access when calling fake without 'make' or
 'build'.

This is caused by the F_data_not return result not being processed in some of the fl_fss functions.

Additional changes:
- Make the return status constant.
- The status is being returned regardless in some cases so remove the effectively redundant lines of code.
- Combined the additional if condition blocks together.
---
 level_1/fl_fss/c/fss/basic.c    |  4 ++--
 level_1/fl_fss/c/fss/extended.c | 12 ++----------
 level_1/fl_fss/c/private-fss.c  | 25 +++++++------------------
 3 files changed, 11 insertions(+), 30 deletions(-)

diff --git a/level_1/fl_fss/c/fss/basic.c b/level_1/fl_fss/c/fss/basic.c
index d081b3d..610848e 100644
--- a/level_1/fl_fss/c/fss/basic.c
+++ b/level_1/fl_fss/c/fss/basic.c
@@ -133,9 +133,9 @@ extern "C" {
 
     const f_array_length_t delimits_used = delimits->used;
 
-    f_status_t status = private_fl_fss_basic_read(buffer, F_true, state, range, found, quote, delimits);
+    const f_status_t status = private_fl_fss_basic_read(buffer, F_true, state, range, found, quote, delimits);
 
-    if (F_status_is_error(status)) {
+    if (F_status_is_error(status) || status == F_fss_found_object_not || status == F_data_not || status == F_data_not_eos || status == F_data_not_stop) {
       delimits->used = delimits_used;
     }
 
diff --git a/level_1/fl_fss/c/fss/extended.c b/level_1/fl_fss/c/fss/extended.c
index 48be121..d762420 100644
--- a/level_1/fl_fss/c/fss/extended.c
+++ b/level_1/fl_fss/c/fss/extended.c
@@ -185,18 +185,10 @@ extern "C" {
 
     const f_array_length_t delimits_used = delimits->used;
 
-    f_status_t status = private_fl_fss_basic_read(buffer, F_true, state, range, found, quoted, delimits);
+    const f_status_t status = private_fl_fss_basic_read(buffer, F_true, state, range, found, quoted, delimits);
 
-    if (F_status_is_error(status)) {
+    if (F_status_is_error(status) || status == F_fss_found_object_not || status == F_data_not || status == F_data_not_eos || status == F_data_not_stop) {
       delimits->used = delimits_used;
-
-      return status;
-    }
-
-    if (status == F_fss_found_object_not || status == F_data_not || status == F_data_not_eos || status == F_data_not_stop) {
-      delimits->used = delimits_used;
-
-      return status;
     }
 
     return status;
diff --git a/level_1/fl_fss/c/private-fss.c b/level_1/fl_fss/c/private-fss.c
index fb138b9..f027405 100644
--- a/level_1/fl_fss/c/private-fss.c
+++ b/level_1/fl_fss/c/private-fss.c
@@ -136,13 +136,9 @@ extern "C" {
       return F_fss_found_object_not;
     }
 
-    if (status == F_none_eos) {
-      return F_data_not_eos;
-    }
-
-    if (status == F_none_stop) {
-      return F_data_not_stop;
-    }
+    if (status == F_none_eos) return F_data_not_eos;
+    if (status == F_none_stop) return F_data_not_stop;
+    if (status == F_data_not) return status;
 
     // Begin the search.
     found->start = range->start;
@@ -704,17 +700,10 @@ extern "C" {
     f_status_t status = f_fss_skip_past_space(state, object, range);
     if (F_status_is_error(status)) return status;
 
-    if (status == F_none_eos) {
-      return F_data_not_eos;
-    }
-
-    if (status == F_none_stop) {
-      return F_data_not_stop;
-    }
-
-    if (status == F_none_eol) {
-      return F_status_set_error(F_none_eol);
-    }
+    if (status == F_none_eos) return F_data_not_eos;
+    if (status == F_none_stop) return F_data_not_stop;
+    if (status == F_none_eol) return F_status_set_error(F_none_eol);
+    if (status == F_data_not) return status;
 
     // Ensure that there is room for the potential start and stop quotes, a potential delimit at start, and the potential object open character.
     status = f_string_dynamic_increase_by(5, destination);
-- 
1.8.3.1