diff options
| author | Jaganath Kanakkassery <jaganath.k@samsung.com> | 2015-05-14 10:28:08 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-06-06 09:44:33 +0300 |
| commit | 951b6a0717db97ce420547222647bcc40bf1eacd (patch) | |
| tree | bbc263be24eaecadb4b15f060e026802bb57860c /net/bluetooth/rfcomm | |
| parent | 6be09b48ae8bcce8426877b5f89e6218ffb657b0 (diff) | |
| download | linux-951b6a0717db97ce420547222647bcc40bf1eacd.tar.xz | |
Bluetooth: Fix potential NULL dereference in RFCOMM bind callback
addr can be NULL and it should not be dereferenced before NULL checking.
Signed-off-by: Jaganath Kanakkassery <jaganath.k@samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/rfcomm')
| -rw-r--r-- | net/bluetooth/rfcomm/sock.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index b2338e971b33..7511df72347f 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -334,16 +334,19 @@ static int rfcomm_sock_create(struct net *net, struct socket *sock, static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) { - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; + struct sockaddr_rc sa; struct sock *sk = sock->sk; - int chan = sa->rc_channel; - int err = 0; - - BT_DBG("sk %p %pMR", sk, &sa->rc_bdaddr); + int len, err = 0; if (!addr || addr->sa_family != AF_BLUETOOTH) return -EINVAL; + memset(&sa, 0, sizeof(sa)); + len = min_t(unsigned int, sizeof(sa), addr_len); + memcpy(&sa, addr, len); + + BT_DBG("sk %p %pMR", sk, &sa.rc_bdaddr); + lock_sock(sk); if (sk->sk_state != BT_OPEN) { @@ -358,12 +361,13 @@ static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr write_lock(&rfcomm_sk_list.lock); - if (chan && __rfcomm_get_listen_sock_by_addr(chan, &sa->rc_bdaddr)) { + if (sa.rc_channel && + __rfcomm_get_listen_sock_by_addr(sa.rc_channel, &sa.rc_bdaddr)) { err = -EADDRINUSE; } else { /* Save source address */ - bacpy(&rfcomm_pi(sk)->src, &sa->rc_bdaddr); - rfcomm_pi(sk)->channel = chan; + bacpy(&rfcomm_pi(sk)->src, &sa.rc_bdaddr); + rfcomm_pi(sk)->channel = sa.rc_channel; sk->sk_state = BT_BOUND; } |