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Message-ID: <c4e2435c57cff7f650c0a82c2ded12c0d1843b80.1702816635.git.code@siddh.me>
Date: Sun, 17 Dec 2023 18:41:04 +0530
From: Siddh Raman Pant <code@...dh.me>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Suman Ghosh <sumang@...vell.com>
Cc: netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH net-next v6 2/2] nfc: Do not send datagram if socket state isn't LLCP_BOUND
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@...dh.me>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Suman Ghosh <sumang@...vell.com>
---
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 645677f84dba..819157bbb5a2 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);
--
2.42.0
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