Subject: [PATCH] net/bluetooth/bnep/sock.c: add CAP_NET_RAW check.

From: Qingyu Li <[email-masked]>
Date: Tue, 18 Aug 2020 16:07:03 +0800

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

Signed-off-by: Qingyu Li <[email-masked]>
---
 net/bluetooth/bnep/sock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index d515571b2afb..e06787a3b5ce 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -204,6 +204,9 @@ static int bnep_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_BLUETOOTH, GFP_ATOMIC, &bnep_proto, kern);
 	if (!sk)
 		return -ENOMEM;
--
2.17.1