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Subject[PATCH 4.14 052/185] nfc: enforce CAP_NET_RAW for raw sockets
Date
From: Ori Nimron <orinimron123@gmail.com>

[ Upstream commit 3a359798b176183ef09efb7a3dc59abad1cc7104 ]

When creating a raw AF_NFC 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>
---
net/nfc/llcp_sock.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -1012,10 +1012,13 @@ static int llcp_sock_create(struct net *
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 = &llcp_rawsock_ops;
- else
+ } else {
sock->ops = &llcp_sock_ops;
+ }

sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC, kern);
if (sk == NULL)

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