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[Bluetooth] Prevent RFCOMM connections through the RAW socket

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This patch adds additional checks to prevent RFCOMM connections be
established through the RAW socket interface.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Marcel Holtmann 2005-09-13 01:32:31 +02:00
parent 21d9e30ed0
commit 354d28d5f8
1 changed files with 26 additions and 6 deletions
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32
net/bluetooth/rfcomm/sock.c
View file

@ -363,6 +363,11 @@ static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr
goto done;
}
if (sk->sk_type != SOCK_STREAM) {
err = -EINVAL;
goto done;
}
write_lock_bh(&rfcomm_sk_list.lock);
if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) {
@ -393,14 +398,18 @@ static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int a
if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_rc))
return -EINVAL;
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
return -EBADFD;
if (sk->sk_type != SOCK_STREAM)
return -EINVAL;
lock_sock(sk);
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) {
err = -EBADFD;
goto done;
}
if (sk->sk_type != SOCK_STREAM) {
err = -EINVAL;
goto done;
}
sk->sk_state = BT_CONNECT;
bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr);
rfcomm_pi(sk)->channel = sa->rc_channel;
@ -410,6 +419,7 @@ static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int a
err = bt_sock_wait_state(sk, BT_CONNECTED,
sock_sndtimeo(sk, flags & O_NONBLOCK));
done:
release_sock(sk);
return err;
}
@ -428,6 +438,11 @@ static int rfcomm_sock_listen(struct socket *sock, int backlog)
goto done;
}
if (sk->sk_type != SOCK_STREAM) {
err = -EINVAL;
goto done;
}
if (!rfcomm_pi(sk)->channel) {
bdaddr_t *src = &bt_sk(sk)->src;
u8 channel;
@ -472,6 +487,11 @@ static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int f
goto done;
}
if (sk->sk_type != SOCK_STREAM) {
err = -EINVAL;
goto done;
}
timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
BT_DBG("sk %p timeo %ld", sk, timeo);