ICU-22516 Return error while the style is invalid

To avoid later unknown address in icu_74::UnicodeString::copyFrom
unicode-org · Sep 25, 2023 · c1475f4 · c1475f4
1 parent 6d1999f
commit c1475f4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/icu4c/source/i18n/reldatefmt.cpp b/icu4c/source/i18n/reldatefmt.cpp
@@ -805,6 +805,10 @@ RelativeDateTimeFormatter::RelativeDateTimeFormatter(
  if (U_FAILURE(status)) {
  return;
  }
+ if (styl < 0 || UDAT_STYLE_COUNT <= styl) {
+ status = U_ILLEGAL_ARGUMENT_ERROR;
+ return;
+ }
  if ((capitalizationContext >> 8) != UDISPCTX_TYPE_CAPITALIZATION) {
  status = U_ILLEGAL_ARGUMENT_ERROR;
  return;