[PATCH AUTOSEL 4.14] nfc: Do not send datagram if socket state isn't LLCP_BOUND
From: Sasha Levin <sashal@kernel.org>
Date: 2024-01-08 12:29:38
Also in:
lkml, stable
Subsystem:
networking [general], nfc subsystem, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Heidelberg, Linus Torvalds
From: Siddh Raman Pant <redacted> [ 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 <redacted> Reviewed-by: Krzysztof Kozlowski <redacted> Reviewed-by: Suman Ghosh <redacted> 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 5bd6494573942..3b37c1ba93e48 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c@@ -803,6 +803,11 @@ 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);
--
2.43.0