[PATCH 2/5] ieee802154: enforce CAP_NET_RAW for raw sockets

[Tyler Hicks]

From: Ori Nimron <orinimron123 at gmail.com>

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

Signed-off-by: Ori Nimron <orinimron123 at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Acked-by: Stefan Schmidt <stefan at datenfreihafen.org>
Signed-off-by: David S. Miller <davem at davemloft.net>

CVE-2019-17053

(cherry picked from commit e69dbd4619e7674c1679cba49afd9dd9ac347eef)
Signed-off-by: Tyler Hicks <tyhicks at canonical.com>
---
 net/ieee802154/socket.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index badc5cfe4dc6..d93d4531aa9b 100644
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -1008,6 +1008,9 @@ 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;
-- 
2.17.1