Re: [PATCH v2 net] nfc: close a race condition in llcp_sock_getname()

[Samuel Ortiz <sameo@linux.intel.com>]

Hi Cong,

On Fri, Jan 29, 2016 at 11:37:40AM -0800, Cong Wang wrote:
> llcp_sock_getname() checks llcp_sock->dev to make sure
> llcp_sock is already connected or bound, however, we could
> be in the middle of llcp_sock_bind() where llcp_sock->dev
> is bound and llcp_sock->service_name_len is set,
> but llcp_sock->service_name is not, in this case we would
> lead to copy some bytes from a NULL pointer.
> 
> Just lock the sock since this is not a hot path anyway.
> 
> Reported-by: Dmitry Vyukov <dvyukov@google.com>
> Cc: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
> Cc: Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
> Cc: Samuel Ortiz <sameo@linux.intel.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
> ---
>  net/nfc/llcp_sock.c | 6 ++++++
>  1 file changed, 6 insertions(+)
Applied as well, thanks.

Cheers,
Samuel.