From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-3775223-1519416016-2-12325765625872368031 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 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES enro, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', 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=arctest; t=1519416015; b=RkCkBtln8nFrJmF+sdjXJboxULgBg0ej785+IjjUPHls0nM pC2C8l/p3Eb0flWNs/PmOyqUgmkYjGouXWZZugbjYOumDhrvo3C+2m/rCRK7El+B WyLzvzCHsQVUdwNVY6VYu07vJrPzI4BLtHmmHLmgrTYXuK6+HrABePA6zj0QvGvP XGHpghyxrS3b6i28LJGm8ozb6IbtocLtgDZqJYMthK5sr3Zw9R87EXZRWwAp6eaR uGsfmdi8vvtm3s1wLu/xMFQSWPcLVrDlrImZHwCQl19Q5Q+WhxXSHU/g2h3XE6qF Ub7IlRRrkgt7BnE52gdjXiv+k8gnMwMa5UDf7WQ== 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=arctest; t=1519416015; bh=GQvhA8kQse/e4VxLx10sMU7AMr /AgMMjIB2W0+VOFxw=; b=c9mzwXsEV3lWdHDZe7GZQXv+JjFRFCdMj/Sg7dN7i6 bfDk+GGW7RA4rfRZ9EjHyw+LTgNPy6Bz/6ZgxRM8eYhVJ5jE/EYHAH0/eSNYavHY y93io6Ubs4bArAa8ORwqMYfDYPNsead6CjiZotgPlIVhZUn8/CylzPg17PmZpBDl zxJGATrRKO4TEONakX+E0tGyzlVTVeU73bKOl9oNAm67w2Bv0GEpDMVNu4GTsCog F5dNevo6aEL85oivOkg7dWAir5vCl+Fa22luhc1V5zf5OVZCMFIJ5o39Hx7oKzUo tzLq13WDNpn1N7KfndWcoWi7h236/R/Cq41JYwXtu7yg== ARC-Authentication-Results: i=1; mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); 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-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 Authentication-Results: mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); 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-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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933375AbeBWSnp (ORCPT ); Fri, 23 Feb 2018 13:43:45 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:42312 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932953AbeBWSno (ORCPT ); Fri, 23 Feb 2018 13:43:44 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Petr Vandrovec , Paolo Abeni , "David S. Miller" Subject: [PATCH 4.9 036/145] dn_getsockoptdecnet: move nf_{get/set}sockopt outside sock lock Date: Fri, 23 Feb 2018 19:25:42 +0100 Message-Id: <20180223170729.553321509@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180223170724.669759283@linuxfoundation.org> References: <20180223170724.669759283@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: Paolo Abeni commit dfec091439bb2acf763497cfc58f2bdfc67c56b7 upstream. After commit 3f34cfae1238 ("netfilter: on sockopt() acquire sock lock only in the required scope"), the caller of nf_{get/set}sockopt() must not hold any lock, but, in such changeset, I forgot to cope with DECnet. This commit addresses the issue moving the nf call outside the lock, in the dn_{get,set}sockopt() with the same schema currently used by ipv4 and ipv6. Also moves the unhandled sockopts of the end of the main switch statements, to improve code readability. Reported-by: Petr Vandrovec BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=198791#c2 Fixes: 3f34cfae1238 ("netfilter: on sockopt() acquire sock lock only in the required scope") Signed-off-by: Paolo Abeni Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/decnet/af_decnet.c | 62 ++++++++++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 29 deletions(-) --- a/net/decnet/af_decnet.c +++ b/net/decnet/af_decnet.c @@ -1337,6 +1337,12 @@ static int dn_setsockopt(struct socket * lock_sock(sk); err = __dn_setsockopt(sock, level, optname, optval, optlen, 0); release_sock(sk); +#ifdef CONFIG_NETFILTER + /* we need to exclude all possible ENOPROTOOPTs except default case */ + if (err == -ENOPROTOOPT && optname != DSO_LINKINFO && + optname != DSO_STREAM && optname != DSO_SEQPACKET) + err = nf_setsockopt(sk, PF_DECnet, optname, optval, optlen); +#endif return err; } @@ -1444,15 +1450,6 @@ static int __dn_setsockopt(struct socket dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation); break; - default: -#ifdef CONFIG_NETFILTER - return nf_setsockopt(sk, PF_DECnet, optname, optval, optlen); -#endif - case DSO_LINKINFO: - case DSO_STREAM: - case DSO_SEQPACKET: - return -ENOPROTOOPT; - case DSO_MAXWINDOW: if (optlen != sizeof(unsigned long)) return -EINVAL; @@ -1500,6 +1497,12 @@ static int __dn_setsockopt(struct socket return -EINVAL; scp->info_loc = u.info; break; + + case DSO_LINKINFO: + case DSO_STREAM: + case DSO_SEQPACKET: + default: + return -ENOPROTOOPT; } return 0; @@ -1513,6 +1516,20 @@ static int dn_getsockopt(struct socket * lock_sock(sk); err = __dn_getsockopt(sock, level, optname, optval, optlen, 0); release_sock(sk); +#ifdef CONFIG_NETFILTER + if (err == -ENOPROTOOPT && optname != DSO_STREAM && + optname != DSO_SEQPACKET && optname != DSO_CONACCEPT && + optname != DSO_CONREJECT) { + int len; + + if (get_user(len, optlen)) + return -EFAULT; + + err = nf_getsockopt(sk, PF_DECnet, optname, optval, &len); + if (err >= 0) + err = put_user(len, optlen); + } +#endif return err; } @@ -1578,26 +1595,6 @@ static int __dn_getsockopt(struct socket r_data = &link; break; - default: -#ifdef CONFIG_NETFILTER - { - int ret, len; - - if (get_user(len, optlen)) - return -EFAULT; - - ret = nf_getsockopt(sk, PF_DECnet, optname, optval, &len); - if (ret >= 0) - ret = put_user(len, optlen); - return ret; - } -#endif - case DSO_STREAM: - case DSO_SEQPACKET: - case DSO_CONACCEPT: - case DSO_CONREJECT: - return -ENOPROTOOPT; - case DSO_MAXWINDOW: if (r_len > sizeof(unsigned long)) r_len = sizeof(unsigned long); @@ -1629,6 +1626,13 @@ static int __dn_getsockopt(struct socket r_len = sizeof(unsigned char); r_data = &scp->info_rem; break; + + case DSO_STREAM: + case DSO_SEQPACKET: + case DSO_CONACCEPT: + case DSO_CONREJECT: + default: + return -ENOPROTOOPT; } if (r_data) {