[PATCH 4.4 29/99] appletalk: enforce CAP_NET_RAW for raw sockets

[Greg Kroah-Hartman]

From: Ori Nimron <orinimron...@gmail.com>

[ Upstream commit 6cc03e8aa36c51f3b26a0d21a3c4ce2809c842ac ]

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

Signed-off-by: Ori Nimron <orinimron...@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/appletalk/ddp.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1029,6 +1029,11 @@ static int atalk_create(struct net *net,
         */
        if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
                goto out;
+
+       rc = -EPERM;
+       if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
+               goto out;
+
        rc = -ENOMEM;
        sk = sk_alloc(net, PF_APPLETALK, GFP_KERNEL, &ddp_proto, kern);
        if (!sk)