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Date: Wed, 1 Nov 2017 22:17:07 +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 3.10 007/139] Bluetooth: cmtp: cmtp_add_connection() should verify that it's dealing with l2cap socket From: Al Viro <viro@...iv.linux.org.uk> commit 96c26653ce65bf84f3212f8b00d4316c1efcbf4c upstream. ... rather than relying on ciptool(8) never passing it anything else. Give it e.g. an AF_UNIX connected socket (from socketpair(2)) and it'll oops, trying to evaluate &l2cap_pi(sock->sk)->chan->dst... 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/cmtp/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c index e0a6ebf..84460f6 100644 --- a/net/bluetooth/cmtp/core.c +++ b/net/bluetooth/cmtp/core.c @@ -334,6 +334,9 @@ int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock) BT_DBG(""); + if (!l2cap_is_socket(sock)) + return -EBADFD; + session = kzalloc(sizeof(struct cmtp_session), GFP_KERNEL); if (!session) return -ENOMEM; -- 2.8.0.rc2.1.gbe9624a
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