linux-kernel - [PATCH 3.16 20/25] ieee802154: enforce CAP_NET

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Message-ID: <lsq.1573602477.508824847@decadent.org.uk>
Date:   Tue, 12 Nov 2019 23:48:17 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "David S. Miller" <davem@...emloft.net>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        "Ori Nimron" <orinimron123@...il.com>,
        "Stefan Schmidt" <stefan@...enfreihafen.org>
Subject: [PATCH 3.16 20/25] ieee802154: enforce CAP_NET_RAW for raw sockets

3.16.77-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ori Nimron <orinimron123@...il.com>

commit e69dbd4619e7674c1679cba49afd9dd9ac347eef upstream.

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

Signed-off-by: Ori Nimron <orinimron123@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Acked-by: Stefan Schmidt <stefan@...enfreihafen.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/ieee802154/af_ieee802154.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/net/ieee802154/af_ieee802154.c
+++ b/net/ieee802154/af_ieee802154.c
@@ -255,6 +255,9 @@ static int ieee802154_create(struct net
 
 	switch (sock->type) {
 	case SOCK_RAW:
+		rc = -EPERM;
+		if (!capable(CAP_NET_RAW))
+			goto out;
 		proto = &ieee802154_raw_prot;
 		ops = &ieee802154_raw_ops;
 		break;