From patchwork Sat Apr 11 12:09:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 228083 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FE80C2BB85 for ; Sat, 11 Apr 2020 12:15:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24F9220787 for ; Sat, 11 Apr 2020 12:15:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607351; bh=4+TtjYr36O5SbE+Sa5S/2ejVsVC84drhWt7x+7rn2KI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zAB4dWKh/PYHqI2qZ9dQloyKZjaBDRfs9dVUpsUG15eFDKUxDPKUIs195611yVTCC DY35XzPbX4rFrolHgPUZYPgFZXVAUaXgyIpxoky52b53uH1Pdmk2kbsRlMfKek7gg2 xsGaT8bkqxOY7skF+9nnplUgwCsM3tbSm18E3XKk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728191AbgDKMPt (ORCPT ); Sat, 11 Apr 2020 08:15:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:49908 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727238AbgDKMPt (ORCPT ); Sat, 11 Apr 2020 08:15:49 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CD74120644; Sat, 11 Apr 2020 12:15:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586607349; bh=4+TtjYr36O5SbE+Sa5S/2ejVsVC84drhWt7x+7rn2KI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CtZTyPkfFdYNZHRFcz/9NKVg99l9pmVFAx5JKqmUCJoq1hjXeDJ9jO0QLqBKg1VzP 5J812BTt6Ho31L/m4qGz+bKewpkCsgnL3IpaRfVdNSqBlSe5bc0iMfoUvCdWe791Ws NjLsIjWlwDp6SXhQ+7t5dshSIN5NOjFsA4cA/T94= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yafang Shao , David Ahern , Andrew Morton , Johannes Berg , Shailabh Nagar , Linus Torvalds Subject: [PATCH 4.19 37/54] tools/accounting/getdelays.c: fix netlink attribute length Date: Sat, 11 Apr 2020 14:09:19 +0200 Message-Id: <20200411115512.207596545@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200411115508.284500414@linuxfoundation.org> References: <20200411115508.284500414@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Ahern commit 4054ab64e29bb05b3dfe758fff3c38a74ba753bb upstream. A recent change to the netlink code: 6e237d099fac ("netlink: Relax attr validation for fixed length types") logs a warning when programs send messages with invalid attributes (e.g., wrong length for a u32). Yafang reported this error message for tools/accounting/getdelays.c. send_cmd() is wrongly adding 1 to the attribute length. As noted in include/uapi/linux/netlink.h nla_len should be NLA_HDRLEN + payload length, so drop the +1. Fixes: 9e06d3f9f6b1 ("per task delay accounting taskstats interface: documentation fix") Reported-by: Yafang Shao Signed-off-by: David Ahern Signed-off-by: Andrew Morton Tested-by: Yafang Shao Cc: Johannes Berg Cc: Shailabh Nagar Cc: Link: http://lkml.kernel.org/r/20200327173111.63922-1-dsahern@kernel.org Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- tools/accounting/getdelays.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/accounting/getdelays.c +++ b/tools/accounting/getdelays.c @@ -136,7 +136,7 @@ static int send_cmd(int sd, __u16 nlmsg_ msg.g.version = 0x1; na = (struct nlattr *) GENLMSG_DATA(&msg); na->nla_type = nla_type; - na->nla_len = nla_len + 1 + NLA_HDRLEN; + na->nla_len = nla_len + NLA_HDRLEN; memcpy(NLA_DATA(na), nla_data, nla_len); msg.n.nlmsg_len += NLMSG_ALIGN(na->nla_len);