diff options
| author | Jaganath Kanakkassery <jaganath.k@samsung.com> | 2015-05-14 12:58:08 +0530 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-11-07 13:44:30 +0100 |
| commit | f5f76c228a564fa6f3c9eeb709538116d428d14a (patch) | |
| tree | 363626e6a3e7b03c58958b7c2e963f772bacf757 | |
| parent | ec4cf4a67c5d937ae3c051050c66ac89d0f99502 (diff) | |
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>
| -rw-r--r-- | net/bluetooth/rfcomm/sock.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 7ca014daa..484c55d45 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -328,15 +328,19 @@ 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 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) { @@ -351,12 +355,13 @@ static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr write_lock(&rfcomm_sk_list.lock); - if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) { + if (sa.rc_channel && + __rfcomm_get_sock_by_addr(sa.rc_channel, &sa.rc_bdaddr)) { err = -EADDRINUSE; } else { /* Save source address */ - bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr); - rfcomm_pi(sk)->channel = sa->rc_channel; + bacpy(&rfcomm_pi(sk)->src, &sa.rc_bdaddr); + rfcomm_pi(sk)->channel = sa.rc_channel; sk->sk_state = BT_BOUND; } |