[PATCH 4.9 034/129] mISDN: enforce CAP_NET_RAW for raw sockets

[Greg Kroah-Hartman]

From: Ori Nimron <orinimron123@xxxxxxxxx>

[ Upstream commit b91ee4aa2a2199ba4d4650706c272985a5a32d80 ]

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

Signed-off-by: Ori Nimron <orinimron123@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/isdn/mISDN/socket.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -766,6 +766,8 @@ base_sock_create(struct net *net, struct
 
 	if (sock->type != SOCK_RAW)
 		return -ESOCKTNOSUPPORT;
+	if (!capable(CAP_NET_RAW))
+		return -EPERM;
 
 	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
 	if (!sk)