From: Siddh Raman Pant code@siddh.me
[ Upstream commit 6ec0d7527c4287369b52df3bcefd21a0c4fb2b7c ]
As we know we cannot send the datagram (state can be set to LLCP_CLOSED by nfc_llcp_socket_release()), there is no need to proceed further.
Thus, bail out early from llcp_sock_sendmsg().
Signed-off-by: Siddh Raman Pant code@siddh.me Reviewed-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Reviewed-by: Suman Ghosh sumang@marvell.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- net/nfc/llcp_sock.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c index 645677f84dba2..819157bbb5a2c 100644 --- a/net/nfc/llcp_sock.c +++ b/net/nfc/llcp_sock.c @@ -796,6 +796,11 @@ static int llcp_sock_sendmsg(struct socket *sock, struct msghdr *msg, }
if (sk->sk_type == SOCK_DGRAM) { + if (sk->sk_state != LLCP_BOUND) { + release_sock(sk); + return -ENOTCONN; + } + DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr, msg->msg_name);