rlc_am_lte: fix potential bug when setting uint32_t to -1

discovered in Coverity CID 359664
4 years ago · 1a03839f78
parent d51a060bfa
commit 1a03839f78
1 changed files with 3 additions and 1 deletions
--- a/lib/src/upper/rlc_am_lte.cc
+++ b/lib/src/upper/rlc_am_lte.cc
@ -872,7 +872,9 @@ int rlc_am_lte::rlc_am_lte_tx::build_data_pdu(uint8_t* payload, uint32_t nof_byt
    }
    head_len = rlc_am_packed_length(&header);
    if (head_len >= pdu_space) {
-      header.N_li--;
+      if (header.N_li > 0) {
+        header.N_li--;
+      }
      break;
    }
    tx_sdu  = tx_sdu_queue.read();