nfc: enforce CAP_NET_RAW for raw sockets

[ Upstream commit 3a359798b176183ef09efb7a3dc59abad1cc7104 ]

When creating a raw AF_NFC socket, CAP_NET_RAW needs to be checked
first.

Signed-off-by: Ori Nimron <orinimron123@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 9c222a1..2dfd1c8 100644 (file)
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -1005,10 +1005,13 @@ static int llcp_sock_create(struct net *net, struct socket *sock,
            sock->type != SOCK_RAW)
                return -ESOCKTNOSUPPORT;
 
-       if (sock->type == SOCK_RAW)
+       if (sock->type == SOCK_RAW) {
+               if (!capable(CAP_NET_RAW))
+                       return -EPERM;
                sock->ops = &llcp_rawsock_ops;
-       else
+       } else {
                sock->ops = &llcp_sock_ops;
+       }
 
        sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
        if (sk == NULL)