Fix buffer overflow in test_printf (fixes #1)

2025-12-07 15:41:15 +01:00
parent ee4883774e
commit c12c4c7bbf
1 changed files with 4 additions and 0 deletions
@@ -31,6 +31,10 @@ void test_printf(char *fmt, ...)
        sizeof(test_output_buffer) - test_output_buffer_used,
        fmt, args);
    va_end(args);
+
+    assert(len > -1);
+    if (len > (int) sizeof(test_output_buffer) - test_output_buffer_used)
+        len = sizeof(test_output_buffer) - test_output_buffer_used;
    test_output_buffer_used += len;
 }