From 9dbb7acffadea0b1e2636564c3e1675400e37b78 Mon Sep 17 00:00:00 2001
From: Pedro Alvarez <pedro.alvarez@softwareradiosystems.com>
Date: Tue, 26 Apr 2022 11:36:55 +0100
Subject: [PATCH] lib,rlc_am_nr: ensure early return if there is not enough
 space for payload plus header

---
 lib/src/rlc/rlc_am_nr.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/src/rlc/rlc_am_nr.cc b/lib/src/rlc/rlc_am_nr.cc
index 9b6607040..9b4ad6baa 100644
--- a/lib/src/rlc/rlc_am_nr.cc
+++ b/lib/src/rlc/rlc_am_nr.cc
@@ -176,6 +176,10 @@ uint32_t rlc_am_nr_tx::read_pdu(uint8_t* payload, uint32_t nof_bytes)
  */
 uint32_t rlc_am_nr_tx::build_new_pdu(uint8_t* payload, uint32_t nof_bytes)
 {
+  if (nof_bytes <= min_hdr_size) {
+    RlcInfo("Not enough bytes for payload plus header. nof_bytes=%d", nof_bytes);
+    return 0;
+  }
   // Read new SDU from TX queue
   unique_byte_buffer_t tx_sdu;
   RlcDebug("Reading from RLC SDU queue. Queue size %d", tx_sdu_queue.size());