From: Ori Nimron <orinimron123@gmail.com>
Date: Fri, 20 Sep 2019 07:35:46 +0000 (+0200)
Subject: appletalk: enforce CAP_NET_RAW for raw sockets
X-Git-Tag: v4.9.195~95
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=08d2af9358c1937acf97417dba9a03a40149c4d2;p=platform%2Fkernel%2Flinux-amlogic.git

appletalk: enforce CAP_NET_RAW for raw sockets

[ Upstream commit 6cc03e8aa36c51f3b26a0d21a3c4ce2809c842ac ]

When creating a raw AF_APPLETALK 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index e206d98b3b82..d74092cc639a 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1029,6 +1029,11 @@ static int atalk_create(struct net *net, struct socket *sock, int protocol,
 	 */
 	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)