From 82ea2673f38fd5987aa43351f81110e7c7acd32b Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Wed, 21 Feb 2007 00:25:10 +0100 Subject: [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: Marcel Holtmann Signed-off-by: Adrian Bunk --- net/bluetooth/l2cap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index cb0054585dd7..328f98846e08 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -440,6 +440,12 @@ 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)) { -- cgit v1.2.3