Bluetooth: fix possible info leak in bt_sock_recvmsg()
In case the socket is already shutting down, bt_sock_recvmsg() returns with 0 without updating msg_namelen leading to net/socket.c leaking the local, uninitialized sockaddr_storage variable to userland -- 128 bytes of kernel stack memory. Fix this by moving the msg_namelen assignment in front of the shutdown test. Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Signed-off-by: NMathias Krause <minipli@googlemail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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