oappend robustness improvement

obuf is reset to nullptr in some cases
2023-12-14 15:58:45 +01:00
parent d6735bed4f
commit 082d1eea48
1 changed files with 1 additions and 1 deletions
--- a/wled00/util.cpp
+++ b/wled00/util.cpp
@@ -148,7 +148,7 @@ bool oappendi(int i)
 bool oappend(const char* txt)
 {
  uint16_t len = strlen(txt);
-  if (olen + len >= SETTINGS_STACK_BUF_SIZE) {
+  if ((obuf == nullptr) || (olen + len >= SETTINGS_STACK_BUF_SIZE)) { // sanity checks
 #ifdef WLED_DEBUG
    DEBUG_PRINT(F("oappend() buffer overflow. Cannot append "));
    DEBUG_PRINT(len); DEBUG_PRINT(F(" bytes \t\""));