mISDN: enforce CAP_NET_RAW for raw sockets

commit b91ee4aa2a2199ba4d4650706c272985a5a32d80 upstream.

When creating a raw AF_ISDN 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: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 1be82284cf9dfaa8ab5f5078bed78c3aec095ed3..be13516660c676b6393dc6cc431ab82294e5b47a 100644 (file)
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -763,6 +763,8 @@ base_sock_create(struct net *net, struct socket *sock, int protocol)
 
        if (sock->type != SOCK_RAW)
                return -ESOCKTNOSUPPORT;
+       if (!capable(CAP_NET_RAW))
+               return -EPERM;
 
        sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
        if (!sk)