added extra length checks

2026-05-12 11:18:11 -07:00 · 2026-03-24 11:13:48 +07:00
parent 7c11ff5330
commit af0659b7ba
1 changed files with 8 additions and 0 deletions
@@ -316,6 +316,14 @@ static uint8_t felica_select_card(felica_card_select_t *card) {
        return 3;
    }

+    // 4. frame too short to contain IDm + PMm (need 4 header + 8 + 8 = 20 bytes)
+    if (FelicaFrame.len < 20) {
+        if (g_dbglevel >= DBG_DEBUG) {
+            Dbprintf("Error: Frame length smaller than 20, got %u", FelicaFrame.len);
+        }
+        return 4;
+    }
+
    // copy UID
    // idm 8
    if (card) {