Commit 847641d7 authored by Marcel Holtmann's avatar Marcel Holtmann
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[Bluetooth] Restrict well known PSM to privileged users 



The PSM values below 0x1001 of L2CAP are reserved for well known
services. Restrict the possibility to bind them to privileged
users.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 73863976

net/bluetooth/l2cap.c

+6 −0
Original line number Diff line number Diff line
@@ -585,6 +585,12 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_ 
		goto done;

	}



	if (la->l2_psm > 0 && btohs(la->l2_psm) < 0x1001 &&

				!capable(CAP_NET_BIND_SERVICE)) {

		err = -EACCES;

		goto done;

	}

		

	write_lock_bh(&l2cap_sk_list.lock);



	if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) {