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Message-ID: <20240108122926.2090989-1-sashal@kernel.org>
Date: Mon, 8 Jan 2024 07:29:23 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Siddh Raman Pant <code@...dh.me>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Suman Ghosh <sumang@...vell.com>,
"David S . Miller" <davem@...emloft.net>,
Sasha Levin <sashal@...nel.org>,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 1/2] nfc: Do not send datagram if socket state isn't LLCP_BOUND
From: Siddh Raman Pant <code@...dh.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@...dh.me>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Suman Ghosh <sumang@...vell.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.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 605d7448c3de1..b27bb2e2486c2 100644
--- a/net/nfc/llcp_sock.c
+++ b/net/nfc/llcp_sock.c
@@ -802,6 +802,11 @@ 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
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