Commit 43c2b9cf authored by Jukka Rissanen's avatar Jukka Rissanen Committed by Benjamin Cabé
Browse files

net: dns: Validate source buffer length properly 



Make sure that when copying the qname, the source buffer is large
enough for the data.

Signed-off-by: default avatarJukka Rissanen <jukka.rissanen@nordicsemi.no>
parent 6f96915a

subsys/net/lib/dns/dns_pack.c

+1 −1
Original line number Diff line number Diff line
@@ -394,7 +394,7 @@ int dns_copy_qname(uint8_t *buf, uint16_t *len, uint16_t size, 
		/* validate that the label (i.e. size + elements),

		 * fits the current msg buffer

		 */

		if (DNS_LABEL_LEN_SIZE + lb_size > size - *len) {

		if (DNS_LABEL_LEN_SIZE + lb_size > MIN(size - *len, msg_size - pos)) {

			rc = -ENOMEM;

			break;

		}

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