diff -drupN a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c --- a/net/bluetooth/af_bluetooth.c 2018-08-06 17:23:04.000000000 +0300 +++ b/net/bluetooth/af_bluetooth.c 2022-06-12 05:28:14.000000000 +0300 @@ -106,11 +106,40 @@ void bt_sock_unregister(int proto) } EXPORT_SYMBOL(bt_sock_unregister); +#ifdef CONFIG_PARANOID_NETWORK +static inline int current_has_bt_admin(void) +{ + return !current_euid(); +} + +static inline int current_has_bt(void) +{ + return current_has_bt_admin(); +} +# else +static inline int current_has_bt_admin(void) +{ + return 1; +} + +static inline int current_has_bt(void) +{ + return 1; +} +#endif + static int bt_sock_create(struct net *net, struct socket *sock, int proto, int kern) { int err; + if (proto == BTPROTO_RFCOMM || proto == BTPROTO_SCO || + proto == BTPROTO_L2CAP) { + if (!current_has_bt()) + return -EPERM; + } else if (!current_has_bt_admin()) + return -EPERM; + if (net != &init_net) return -EAFNOSUPPORT;