[PATCH 4.19 133/168] net/nfc/rawsock.c: add CAP_NET_RAW check.

Greg Kroah-Hartman
2020-08-17T17:39:02Z

From: Qingyu Li <ieatmuttonchuan@gmail.com>

[ 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>
---
net/nfc/rawsock.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -344,10 +344,13 @@ static int rawsock_create(struct net *ne
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)