NFC: Check for llcp_sock and its device from llcp_sock_getname

They both can potentially be NULL.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index 6152d05..ddeb9aa 100644 (file)
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -294,6 +294,9 @@ static int llcp_sock_getname(struct socket *sock, struct sockaddr *uaddr,
        struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
        DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, llcp_addr, uaddr);
 
+       if (llcp_sock == NULL || llcp_sock->dev == NULL)
+               return -EBADFD;
+
        pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
                 llcp_sock->dsap, llcp_sock->ssap);