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rlc_am: add check to prevent out of bounds access

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master
Andre Puschmann 5 years ago
parent 45e0233fee
commit 9078b2baf1
1 changed files with 1 additions and 1 deletions
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2
lib/src/upper/rlc_am_lte.cc
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@ -1605,7 +1605,7 @@ int rlc_am_lte::rlc_am_lte_rx::get_status_pdu(rlc_status_pdu_t* status, const ui
// make sure we don't exceed grant size // make sure we don't exceed grant size
if (rlc_am_packed_length(status) > max_pdu_size) { if (rlc_am_packed_length(status) > max_pdu_size) {
log->debug("Status PDU too big (%d > %d)\n", rlc_am_packed_length(status), max_pdu_size); log->debug("Status PDU too big (%d > %d)\n", rlc_am_packed_length(status), max_pdu_size);
if (status->N_nack >= 1) { if (status->N_nack >= 1 && status->N_nack < RLC_AM_WINDOW_SIZE) {
log->debug("Removing last NACK SN=%d\n", status->nacks[status->N_nack].nack_sn); log->debug("Removing last NACK SN=%d\n", status->nacks[status->N_nack].nack_sn);
status->N_nack--; status->N_nack--;
// make sure we don't have the current ACK_SN in the NACK list // make sure we don't have the current ACK_SN in the NACK list

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