From nobody Fri Dec 26 09:14:22 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CFF547765; Mon, 8 Jan 2024 12:29:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QXeXj03R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC560C433C9; Mon, 8 Jan 2024 12:29:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1704716978; bh=rSUmeeFRfn9BXB7cBXAsUon721/d5iXlfgIGzrx+Rr0=; h=From:To:Cc:Subject:Date:From; b=QXeXj03RL9Dgmj98wwTo0a7S+ZSTc2KomgwvMTsphLVayfaW6XsJCanTmwrFmBAIr /3HNvuLl0yIYGoeoI5ajRsan1N0jqaXd85Uqx0DfCz+YHJn/aNfYzgwRpuyzMPkRJz lfONI7tYqSVharYIUnj6jfrMvbLw25e0DgwneOqbKNrk7P2Yl7kja3sQ3pMcbjrQGL k+lJuh7hPJ8hdvdsUGebZm4bTLJGrcKftQSJCetPoI+SQOl/kBMHtXecplGahNi2MO iuxwnZywD6zxReetPA7Cw9u4c2BAI1Ctb8uVqDb45DOLjNg0efp2FoccopLZZXvpZr n+TbD5sUz2J9A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Siddh Raman Pant , Krzysztof Kozlowski , Suman Ghosh , "David S . Miller" , Sasha Levin , edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.14] nfc: Do not send datagram if socket state isn't LLCP_BOUND Date: Mon, 8 Jan 2024 07:29:32 -0500 Message-ID: <20240108122933.2091065-1-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 4.14.334 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Siddh Raman Pant [ 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 Reviewed-by: Krzysztof Kozlowski Reviewed-by: Suman Ghosh Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- 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, stru= ct msghdr *msg, } =20 if (sk->sk_type =3D=3D SOCK_DGRAM) { + if (sk->sk_state !=3D LLCP_BOUND) { + release_sock(sk); + return -ENOTCONN; + } + DECLARE_SOCKADDR(struct sockaddr_nfc_llcp *, addr, msg->msg_name); =20 --=20 2.43.0