Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 36f2fd58 authored by Gustavo Padovan's avatar Gustavo Padovan Committed by Marcel Holtmann
Browse files

Bluetooth: Check if SDU size is greater than MTU on L2CAP 



After reassembly the SDU we need to check his size. It can't overflow
the MTU size.

Signed-off-by: default avatarGustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: default avatarJoão Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 277ffbe3

net/bluetooth/l2cap.c

+5 −1
Original line number Diff line number Diff line
@@ -3277,15 +3277,19 @@ static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 co 
		pi->conn_state &= ~L2CAP_CONN_SAR_SDU;

		pi->partial_sdu_len += skb->len;



		if (pi->partial_sdu_len > pi->imtu)

			goto drop;



		if (pi->partial_sdu_len == pi->sdu_len) {

			_skb = skb_clone(pi->sdu, GFP_ATOMIC);

			err = sock_queue_rcv_skb(sk, _skb);

			if (err < 0)

				kfree_skb(_skb);

		}

		kfree_skb(pi->sdu);

		err = 0;



drop:

		kfree_skb(pi->sdu);

		break;

	}