linux-kernel - [PATCH 3.10 006/139] Bluetooth: bnep: bnep_add_connection() should verify that it's dealing with l2cap socket

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Message-Id: <1509571159-4405-7-git-send-email-w@1wt.eu>
Date:   Wed,  1 Nov 2017 22:17:06 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        Marcel Holtmann <marcel@...tmann.org>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 006/139] Bluetooth: bnep: bnep_add_connection() should verify that it's dealing with l2cap socket

From: Al Viro <viro@...iv.linux.org.uk>

commit 71bb99a02b32b4cc4265118e85f6035ca72923f0 upstream.

same story as cmtp

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Willy Tarreau <w@....eu>
---
 net/bluetooth/bnep/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index e430b1a..e387e67 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -32,6 +32,7 @@
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/l2cap.h>
 #include <net/bluetooth/hci_core.h>
 
 #include "bnep.h"
@@ -539,6 +540,9 @@ int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock)
 
 	BT_DBG("");
 
+	if (!l2cap_is_socket(sock))
+		return -EBADFD;
+
 	baswap((void *) dst, &bt_sk(sock->sk)->dst);
 	baswap((void *) src, &bt_sk(sock->sk)->src);
 
-- 
2.8.0.rc2.1.gbe9624a