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Bluetooth: Lock socket when reading HCI socket options 

When reading the HCI raw socket option, the socket was never locked. So
lock the socket and in addition return EINVAL on non raw sockets.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2012-02-20 14:50:33 +01:00 committed by Johan Hedberg
parent 2f39cdb7a2
commit cedc546977
1 changed files with 17 additions and 6 deletions
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23
net/bluetooth/hci_sock.c
View File

@ -677,11 +677,20 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char
{
struct hci_ufilter uf;
struct sock *sk = sock->sk;
int len, opt;
int len, opt, err = 0;
BT_DBG("sk %p, opt %d", sk, optname);
if (get_user(len, optlen))
return -EFAULT;
lock_sock(sk);
if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
err = -EINVAL;
goto done;
}
switch (optname) {
case HCI_DATA_DIR:
if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
@ -690,7 +699,7 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char
opt = 0;
if (put_user(opt, optval))
return -EFAULT;
err = -EFAULT;
break;
case HCI_TIME_STAMP:
@ -700,7 +709,7 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char
opt = 0;
if (put_user(opt, optval))
return -EFAULT;
err = -EFAULT;
break;
case HCI_FILTER:
@ -715,15 +724,17 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char
len = min_t(unsigned int, len, sizeof(uf));
if (copy_to_user(optval, &uf, len))
return -EFAULT;
err = -EFAULT;
break;
default:
return -ENOPROTOOPT;
err = -ENOPROTOOPT;
break;
}
return 0;
done:
release_sock(sk);
return err;
}
static const struct proto_ops hci_sock_ops = {