From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-289078-1526280832-2-12429604828582773745 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.249, MAILING_LIST_MULTI -1, RCVD_IN_DNSWL_HI -5, LANGUAGES unknown, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=fm2; t= 1526280831; b=kW5EFWpCvY0M6WeSc1n3XsmfNe1sFA01oJ5X59dbAxYoW+yfdO QW2FesqLO/w8C4N1eLzS8+8pmiYmczh+qS8A3kq3MtXKrLuxGzpoZWlAYqrtapmN 8OwGBU9m1sNYUEBOfEfqIngfSA5Suk6Ou6K8kgTQtSFIR1isjQfPJD6rZcSl7N8m Mk71qgXz/YFLWFBoTkVneDaNmjEVEn7Kli04IWuhTzwe2vI9ih4AhvsEfox7IWK+ +UWv6wAndcObdZuINvPbboJIzw0l1y+6FkrVpejwyhtHKEjyPmNfUDZ0UjRnlnDO QXf2UjEU6hoBjAStzU5IbntyyAY+AhDt1+uQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=fm2; t=1526280831; bh=GzQSLTeI9ZWpm6Bjxp8yA8n1nbzhMf m3KMo7QrrJMwI=; b=e0VAw3JpDt/NM9N5twzNLevQ//Jfgp18rLcwxnbBqN74KF GAyslymY7JySnLrAcrPxk1ZQxjG3IZhb/qM0nhz2hjdfFSG/wh5VhDN8YljiNRV0 Oe5LKYY9MaZhJQ/FSJHnaV8aeopsjflXclP3e1AHH4IGA6CgsqccgNPJUuUCF2Nu 0dwFDqHC0XmtKdL7hk9SXGcDbMFir8TP0SapROt3ryFfudMZ8aIt4iKBGnuSJGcb cvuSV0FWxBzWwU7uVXFSs2L2ozj9W7r9k7kk5roLCfrZPL5o9hWGoe33jHemBz0Y 4V+grRgU3VHXCYAfeP1OGyFEuxWpgRDnjwHjyGnA== ARC-Authentication-Results: i=1; mx1.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=kernel.org header.i=@kernel.org header.b=MSGbRNtN x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=default; dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx1.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=kernel.org header.i=@kernel.org header.b=MSGbRNtN x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=default; dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfKjYfjhaY0L6puAvHxQYQrFQglMK4SCGPDGLIq2ce2ngNSUkd/8geEXfQoBHzCTc9vd6eTU8eKtzSllVNHR+V63hf+eWevS9xuSZYQ56lhhpOsnnpkiG WBKp1ibVRVtar4eVF09DGc+Fvt+YPAFU5vKQtw7h1WOS+zH/3nRubW6CgaRmFt/QGFaFu/wwGht4uvKNMHA0U/DcYoTmwy53z0EzfkVLUkHG6VvreIWJUCGw X-CM-Analysis: v=2.3 cv=WaUilXpX c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=VUJBJC2UJ8kA:10 a=1XWaLZrsAAAA:8 a=4RBUngkUAAAA:8 a=J1Y8HTJGAAAA:8 a=ag1SF4gXAAAA:8 a=-XdVNQPLK4woCof97h0A:9 a=QEXdDO2ut3YA:10 a=_sbA2Q-Kp09kWB8D3iXc:22 a=y1Q9-5lHfBjTkpIzbSAN:22 a=Yupwre4RP9_Eg_Bd0iYG:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752909AbeENGxr (ORCPT ); Mon, 14 May 2018 02:53:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:59928 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752903AbeENGxp (ORCPT ); Mon, 14 May 2018 02:53:45 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eric Dumazet , syzbot , "David S. Miller" Subject: [PATCH 4.9 05/36] netlink: fix uninit-value in netlink_sendmsg Date: Mon, 14 May 2018 08:48:39 +0200 Message-Id: <20180514064804.662038663@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180514064804.252823817@linuxfoundation.org> References: <20180514064804.252823817@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet commit 6091f09c2f79730d895149bcfe3d66140288cd0e upstream. syzbot reported : BUG: KMSAN: uninit-value in ffs arch/x86/include/asm/bitops.h:432 [inline] BUG: KMSAN: uninit-value in netlink_sendmsg+0xb26/0x1310 net/netlink/af_netlink.c:1851 Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Eric Dumazet Reported-by: syzbot Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/netlink/af_netlink.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1795,6 +1795,8 @@ static int netlink_sendmsg(struct socket if (msg->msg_namelen) { err = -EINVAL; + if (msg->msg_namelen < sizeof(struct sockaddr_nl)) + goto out; if (addr->nl_family != AF_NETLINK) goto out; dst_portid = addr->nl_pid;