ieee802154: enforce CAP_NET_RAW for raw sockets

When creating a raw AF_IEEE802154 socket, CAP_NET_RAW needs to be
checked first.

Signed-off-by: Ori Nimron <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Acked-by: Stefan Schmidt <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
(cherry picked from commit e69dbd4)

Orabug: 30444944
CVE: CVE-2019-17053

Reviewed-by: John Donnelly <[email protected]>
Signed-off-by: Allen Pais <[email protected]>
Signed-off-by: Somasundaram Krishnasamy <[email protected]>

Author: Armondile

net/ieee802154/socket.c

@@ -1001,6 +1001,9 @@ static int ieee802154_create(struct net *net, struct socket *sock,
 
 	switch (sock->type) {
 	case SOCK_RAW:
+		rc = -EPERM;
+		if (!capable(CAP_NET_RAW))
+			goto out;
 		proto = &ieee802154_raw_prot;
 		ops = &ieee802154_raw_ops;
 		break;