From patchwork Sat Dec 9 11:04:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Siddh Raman Pant X-Patchwork-Id: 13486023 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=siddh.me header.i=code@siddh.me header.b="iMDwsRhC" Received: from sender-of-o51.zoho.in (sender-of-o51.zoho.in [103.117.158.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBB1310C8; Sat, 9 Dec 2023 03:05:06 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1702119867; cv=none; d=zohomail.in; s=zohoarc; b=J05YNytQQ08OVuEdffm0ONXgnJz70v6PpR74ibqfIFaAG39gVFS/F97r+BcBED5cTm/SqE7UOUJb8ufbVLVymHG1haE6V69eEV9Fhu0KSObbOfK5RlJHF+xHQ4PccxoWt9vwb/C9iGs8Ks501gwQ+fNoyikp+ENGb4YRAMRyjME= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.in; s=zohoarc; t=1702119867; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=Scp3IrJnE67ltgIhAprfULm6HsQ/s5KxrhhmK7w7AQs=; b=ZDAUYayn2MUkW3y3O+V8hqpZbFHaay/Av5s+Gxd8bhI626qK4Ixg73Z/4FvrCzYxjv6FQmvbCBFyZREoF8CThp468IN5u+me/YaOdrQCmn7k17dWkpZspoV6at+Eh28ZAQz9LCsmc40K12X3Wzm80+K66QiU+r7l0/UuNj67sqQ= ARC-Authentication-Results: i=1; mx.zohomail.in; dkim=pass header.i=siddh.me; spf=pass smtp.mailfrom=code@siddh.me; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1702119867; s=zmail; d=siddh.me; i=code@siddh.me; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=Scp3IrJnE67ltgIhAprfULm6HsQ/s5KxrhhmK7w7AQs=; b=iMDwsRhC0/xem8Bu+VmUiIJDrKS1Ja2e/WXxWEMgbD3barv4hDhni9K2KkfF6YTb edfvTrwBZtrR8tcC0BMujRKxjRwPPpn+LH+xCNcTj6t+ESAPyy+8J/QoJg88o33awNA BDHWs7LuOHQLwZue22pKG7+9Src4aeeu+DFyaeJo= Received: from kampyooter.. (110.227.243.208 [110.227.243.208]) by mx.zoho.in with SMTPS id 1702119865580645.3578578519617; Sat, 9 Dec 2023 16:34:25 +0530 (IST) From: Siddh Raman Pant To: Krzysztof Kozlowski , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Suman Ghosh Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v4 2/2] nfc: Do not send datagram if socket state isn't LLCP_BOUND Date: Sat, 9 Dec 2023 16:34:21 +0530 Message-ID: X-Mailer: git-send-email 2.42.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ZohoMailClient: External X-Patchwork-Delegate: kuba@kernel.org 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 --- 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);