When handling includes, detect missing interned strings earlier.

There were three separate places where we were hitting a sandbox Bug
warning before we actually exited.

Fixes #40094; bugfix on 0.3.1.1-alpha when %includes were introduced.

1 files changed, 21 insertions, 6 deletions

diff --git a/src/lib/fs/conffile.c b/src/lib/fs/conffile.c
index f1f6d8ae5f..1f58a3590c 100644
--- a/src/lib/fs/conffile.c
+++ b/src/lib/fs/conffile.c
@@ -19,6 +19,7 @@
 #include "lib/fs/path.h"
 #include "lib/log/log.h"
 #include "lib/malloc/malloc.h"
+#include "lib/sandbox/sandbox.h"
 #include "lib/string/printf.h"
 
 #include <stdbool.h>
@@ -59,14 +60,14 @@ config_get_lines_include(const char *string, config_line_t **result,
 static smartlist_t *
 expand_glob(const char *pattern, smartlist_t *opened_files)
 {
-  smartlist_t *matches = tor_glob(pattern);
-  if (!matches) {
-    return NULL;
+  if (! has_glob(pattern)) {
+    smartlist_t *matches = smartlist_new();
+    smartlist_add_strdup(matches, pattern);
+    return matches;
   }
 
-  // if it is not a glob, return error when the path is missing
-  if (!has_glob(pattern) && smartlist_len(matches) == 0) {
-    smartlist_free(matches);
+  smartlist_t *matches = tor_glob(pattern);
+  if (!matches) {
     return NULL;
   }
 
@@ -107,6 +108,13 @@ config_get_file_list(const char *pattern, smartlist_t *opened_files)
     if (opened_files) {
       smartlist_add_strdup(opened_files, path);
     }
+    if (sandbox_interned_string_is_missing(path)) {
+      log_err(LD_CONFIG, "Sandbox is active, but a new configuration "
+              "file \"%s\" has been listed with %%include. Cannot proceed.",
+              path);
+      error_found = true;
+      break;
+    }
 
     file_status_t file_type = file_status(path);
     if (file_type == FN_FILE) {
@@ -201,6 +209,13 @@ config_process_include(const char *pattern, int recursion_level, int extended,
 
   int rv = -1;
   SMARTLIST_FOREACH_BEGIN(config_files, const char *, config_file) {
+    if (sandbox_interned_string_is_missing(config_file)) {
+      log_err(LD_CONFIG, "Sandbox is active, but a new configuration "
+              "file \"%s\" has been listed with %%include. Cannot proceed.",
+              config_file);
+      goto done;
+    }
+
     log_notice(LD_CONFIG, "Including configuration file \"%s\".", config_file);
     config_line_t *included_config = NULL;
     config_line_t *included_config_last = NULL;