From: Marcel Holtmann <marcel@holtmann.org>
Date: Mon, 20 Feb 2012 19:54:10 +0000 (+0100)
Subject: Bluetooth: Restrict access to management interface
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=801f13bd8ecc58f2cf42ec602a2b5db10fc5a132;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Bluetooth: Restrict access to management interface

The management interface on the HCI control channel should be restricted
to applications with CAP_NET_ADMIN permission.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 213697d23771..8c429a179aa4 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -656,6 +656,11 @@ static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_le
 			goto done;
 		}
 
+		if (!capable(CAP_NET_ADMIN)) {
+			err = -EPERM;
+			goto done;
+		}
+
 		set_bit(HCI_PI_MGMT_INIT, &hci_pi(sk)->flags);
 		break;