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gnrc_netif_ieee802154: check if mhr_len is lesser than nread

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Martine Lenders 2019-04-15 15:41:18 +02:00 committed by Martine Lenders
parent 7169695cb5
commit 3c19aa7dfc
1 changed files with 3 additions and 1 deletions
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4
sys/net/gnrc/netif/ieee802154/gnrc_netif_ieee802154.c
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@ -143,7 +143,9 @@ static gnrc_pktsnip_t *_recv(gnrc_netif_t *netif)
#endif
size_t mhr_len = ieee802154_get_frame_hdr_len(pkt->data);
if (mhr_len == 0) {
/* nread was checked for <= 0 before so we can safely cast it to
* unsigned */
if ((mhr_len == 0) || ((size_t)nread < mhr_len)) {
DEBUG("_recv_ieee802154: illegally formatted frame received\n");
gnrc_pktbuf_release(pkt);
return NULL;