Bound INI buffers to allocator limits and log allocation errors

src/config_ini.h

@@ -54,7 +54,7 @@ static inline int config_ini_key_value(const char *line, char *key, size_t key_c
 /* Проверить физические строки до разбора, чтобы не принять хвост длинной строки за новую опцию. */
 static inline int config_ini_validate(const char *text, size_t length, const char *filename) {
     size_t column = 0, line = 1;
-    if (!text && length) return -1;
+    if (!text && length) { DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s: NULL configuration buffer", filename); return -1; }
     for (size_t i = 0; i < length; i++) {
         if (!text[i] || (text[i] != '\n' && ++column >= CONFIG_INI_LINE_SIZE - 1)) {
             DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s:%zu: INI contains NUL or a line longer than 1022 bytes", filename, line);
@@ -73,7 +73,7 @@ static inline int config_ini_read(FILE *file, const char *filename, char **text,
     *text = NULL;
     *length = 0;
     while ((count = fread(chunk, 1, sizeof(chunk), file)) != 0) {
-        if (memchr(chunk, '\0', count) || output.len > SIZE_MAX - count - 1 ||
+        if (memchr(chunk, '\0', count) || output.len > UINT32_MAX / 2 - count - 1 ||
             strbuf_addf(&output, "%.*s", (int)count, chunk) < 0) {
             DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s: cannot read INI text (NUL, size overflow or allocation failure)", filename);
             strbuf_free(&output);
@@ -85,7 +85,11 @@ static inline int config_ini_read(FILE *file, const char *filename, char **text,
         strbuf_free(&output);
         return -1;
     }
-    if (!output.buf && strbuf_addf(&output, "%s", "") < 0) { strbuf_free(&output); return -1; }
+    if (!output.buf && strbuf_addf(&output, "%s", "") < 0) {
+        DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s: cannot allocate empty configuration buffer", filename);
+        strbuf_free(&output);
+        return -1;
+    }
     *length = output.len;
     *text = strbuf_detach(&output);
     return 0;

src/config_updater.c

@@ -217,7 +217,7 @@ static int config_publish(const char *filename, const char *text, size_t length,
 #endif
     phase = "create temporary file";
     size_t name_length = strlen(filename);
-    if (name_length > SIZE_MAX - 64) { errno = EOVERFLOW; goto done; }
+    if (name_length > UINT32_MAX - 64) { errno = EOVERFLOW; goto done; }
     temp = u_malloc(name_length + 64);
     if (!temp) goto done;
     temp[0] = '\0';
@@ -312,7 +312,7 @@ int config_ensure_keys_and_node_id(const char *filename) {
         return -1;
     }
     if (!text) text = u_strdup("");
-    if (!text) return -1;
+    if (!text) { DEBUG_ERROR(DEBUG_CATEGORY_CONFIG, "%s: cannot allocate configuration buffer", filename); return -1; }
     struct config_field fields[CFG_FIELD_COUNT];
     size_t ends[CFG_SECTION_COUNT];
     config_fields_init(fields);