linux-kernel - [PATCH 3.16 19/25] ax25: enforce CAP_NET

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Date:   Tue, 12 Nov 2019 23:48:16 +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>,
        "Ori Nimron" <orinimron123@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Subject: [PATCH 3.16 19/25] ax25: 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 0614e2b73768b502fc32a75349823356d98aae2c upstream.

When creating a raw AF_AX25 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>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/ax25/af_ax25.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -853,6 +853,8 @@ static int ax25_create(struct net *net,
 		break;
 
 	case SOCK_RAW:
+		if (!capable(CAP_NET_RAW))
+			return -EPERM;
 		break;
 	default:
 		return -ESOCKTNOSUPPORT;