From: Ori Nimron <orinimron123@gmail.com>
Date: Fri, 20 Sep 2019 07:35:49 +0000 (+0200)
Subject: nfc: enforce CAP_NET_RAW for raw sockets
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3a359798b176183ef09efb7a3dc59abad1cc7104;p=linux.git

nfc: enforce CAP_NET_RAW for raw sockets

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>
---

diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c
index 9b8742947aff1..8dfea26536c9d 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -1004,10 +1004,13 @@ 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)