From: Qingyu Li <ieatmuttonchuan@gmail.com>
Date: Mon, 10 Aug 2020 01:51:00 +0000 (+0800)
Subject: net/nfc/rawsock.c: add CAP_NET_RAW check.
X-Git-Tag: v4.4.233~43
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de7c8ab8cb412d21ffdac94a99ef2f29f7802fd1;p=thirdparty%2Fkernel%2Fstable.git

net/nfc/rawsock.c: add CAP_NET_RAW check.

[ Upstream commit 26896f01467a28651f7a536143fe5ac8449d4041 ]

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

Signed-off-by: Qingyu Li <ieatmuttonchuan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index e386e6c90b179..574af981806fa 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -344,10 +344,13 @@ static int rawsock_create(struct net *net, struct socket *sock,
 	if ((sock->type != SOCK_SEQPACKET) && (sock->type != SOCK_RAW))
 		return -ESOCKTNOSUPPORT;
 
-	if (sock->type == SOCK_RAW)
+	if (sock->type == SOCK_RAW) {
+		if (!capable(CAP_NET_RAW))
+			return -EPERM;
 		sock->ops = &rawsock_raw_ops;
-	else
+	} else {
 		sock->ops = &rawsock_ops;
+	}
 
 	sk = sk_alloc(net, PF_NFC, GFP_ATOMIC, nfc_proto->proto, kern);
 	if (!sk)