From: Ori Nimron <orinimron123@gmail.com>
Date: Fri, 20 Sep 2019 07:35:45 +0000 (+0200)
Subject: mISDN: enforce CAP_NET_RAW for raw sockets
X-Git-Tag: v3.16.77~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f49bd6510620b9cd434b87bea639f07dfde56f09;p=thirdparty%2Fkernel%2Fstable.git

mISDN: enforce CAP_NET_RAW for raw sockets

commit b91ee4aa2a2199ba4d4650706c272985a5a32d80 upstream.

When creating a raw AF_ISDN 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: Ben Hutchings <ben@decadent.org.uk>
---

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 1be82284cf9df..be13516660c67 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -763,6 +763,8 @@ base_sock_create(struct net *net, struct socket *sock, int protocol)
 
 	if (sock->type != SOCK_RAW)
 		return -ESOCKTNOSUPPORT;
+	if (!capable(CAP_NET_RAW))
+		return -EPERM;
 
 	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
 	if (!sk)