[Bluetooth] Add locking for bt_proto array manipulation

The bt_proto array needs to be protected by some kind of locking to
prevent a race condition between bt_sock_create and bt_sock_register.

And in addition all calls to sk_alloc need to be made GFP_ATOMIC now.

Signed-off-by: Masatake YAMATO <jet@gyve.org>
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 530cc41f3a22..544d65b7baa7 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -336,7 +336,8 @@ static int rfcomm_sock_create(struct socket *sock, int protocol)
 
         sock->ops = &rfcomm_sock_ops;
 
-        if (!(sk = rfcomm_sock_alloc(sock, protocol, GFP_KERNEL)))
+        sk = rfcomm_sock_alloc(sock, protocol, GFP_ATOMIC);
+        if (!sk)
                 return -ENOMEM;
 
         rfcomm_sock_init(sk, NULL);