From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 868D3C77B75 for ; Mon, 22 May 2023 19:20:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234336AbjEVTUT (ORCPT ); Mon, 22 May 2023 15:20:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234331AbjEVTUO (ORCPT ); Mon, 22 May 2023 15:20:14 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A84D93 for ; Mon, 22 May 2023 12:20:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 086B662817 for ; Mon, 22 May 2023 19:20:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13F9DC433EF; Mon, 22 May 2023 19:20:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684783212; bh=f/B95GWl0V89cK7SWyr8lHVD5SuLpvXDoOEZ6S7HRCk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vnn77HPHGv1B946ty8SFMIz/6H4MIJ7tVkdLJkixFihJUZkOTuKC9/75jQHwDpOo3 xY3j7fHmR0asmGskBKeTsRMKNQz6K4tG8jrP0NUvJDqVaHTlAAYbH756am4jhB5O1m 09dyc9Ce0LlKFxsux4mMGwB9lRXNimQsyECV0wDs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Oleksij Rempel , Marc Kleine-Budde , Oliver Hartkopp Subject: [PATCH 5.15 175/203] can: j1939: recvmsg(): allow MSG_CMSG_COMPAT flag Date: Mon, 22 May 2023 20:09:59 +0100 Message-Id: <20230522190359.843192787@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522190354.935300867@linuxfoundation.org> References: <20230522190354.935300867@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Oliver Hartkopp commit 1db080cbdbab28752bbb1c86d64daf96253a5da1 upstream. The control message provided by J1939 support MSG_CMSG_COMPAT but blocked recvmsg() syscalls that have set this flag, i.e. on 32bit user space on 64 bit kernels. Link: https://github.com/hartkopp/can-isotp/issues/59 Cc: Oleksij Rempel Suggested-by: Marc Kleine-Budde Signed-off-by: Oliver Hartkopp Tested-by: Oleksij Rempel Acked-by: Oleksij Rempel Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Link: https://lore.kernel.org/20230505110308.81087-3-mkl@pengutronix.de Cc: stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- net/can/j1939/socket.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/can/j1939/socket.c +++ b/net/can/j1939/socket.c @@ -798,7 +798,7 @@ static int j1939_sk_recvmsg(struct socke struct j1939_sk_buff_cb *skcb; int ret = 0; - if (flags & ~(MSG_DONTWAIT | MSG_ERRQUEUE)) + if (flags & ~(MSG_DONTWAIT | MSG_ERRQUEUE | MSG_CMSG_COMPAT)) return -EINVAL; if (flags & MSG_ERRQUEUE)