Filter out invalid chars to avoid out-of-bounds memory access

2021-05-08 00:21:58 +02:00
parent c25d599393
commit 5403ab4b00
1 changed files with 1 additions and 1 deletions
@@ -856,7 +856,7 @@ coord_t BitmapBuffer::drawSizedText(coord_t x, coord_t y, const char * s, uint8_
      uint8_t width = drawChar(x, y, font, fontspecs, c, flags);
      INCREMENT_POS(width + CHAR_SPACING);
    }
-    else if (c >= 0x20) {
+    else if ((c >= 0x20) && (c < CJK_FIRST_LETTER_INDEX + 0x20)) {
      uint8_t width = drawChar(x, y, font, fontspecs, getMappedChar(c), flags);
      if ((flags & SPACING_NUMBERS_CONST) && c >= '0' && c <= '9')
        INCREMENT_POS(getCharWidth('9', fontspecs) + CHAR_SPACING);