From owner-svn-src-head@freebsd.org Thu Jun 21 20:18:24 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 93C4610276E4; Thu, 21 Jun 2018 20:18:24 +0000 (UTC) (envelope-from mmacy@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 493B58CABF; Thu, 21 Jun 2018 20:18:24 +0000 (UTC) (envelope-from mmacy@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 2A5F216A55; Thu, 21 Jun 2018 20:18:24 +0000 (UTC) (envelope-from mmacy@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w5LKIO8s025491; Thu, 21 Jun 2018 20:18:24 GMT (envelope-from mmacy@FreeBSD.org) Received: (from mmacy@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w5LKIO2h025490; Thu, 21 Jun 2018 20:18:24 GMT (envelope-from mmacy@FreeBSD.org) Message-Id: <201806212018.w5LKIO2h025490@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mmacy set sender to mmacy@FreeBSD.org using -f From: Matt Macy Date: Thu, 21 Jun 2018 20:18:24 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r335501 - head/sys/netinet X-SVN-Group: head X-SVN-Commit-Author: mmacy X-SVN-Commit-Paths: head/sys/netinet X-SVN-Commit-Revision: 335501 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Jun 2018 20:18:24 -0000 Author: mmacy Date: Thu Jun 21 20:18:23 2018 New Revision: 335501 URL: https://svnweb.freebsd.org/changeset/base/335501 Log: raw_ip: validate inp in both loops Continuation of r335497. Also move the lock acquisition up to validate before referencing inp_cred. Reported by: pho Modified: head/sys/netinet/raw_ip.c Modified: head/sys/netinet/raw_ip.c ============================================================================== --- head/sys/netinet/raw_ip.c Thu Jun 21 18:40:15 2018 (r335500) +++ head/sys/netinet/raw_ip.c Thu Jun 21 20:18:23 2018 (r335501) @@ -312,29 +312,31 @@ rip_input(struct mbuf **mp, int *offp, int proto) continue; if (inp->inp_faddr.s_addr != ip->ip_src.s_addr) continue; - if (jailed_without_vnet(inp->inp_cred)) { - /* - * XXX: If faddr was bound to multicast group, - * jailed raw socket will drop datagram. - */ - if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0) - continue; - } if (last != NULL) { struct mbuf *n; n = m_copym(m, 0, M_COPYALL, M_NOWAIT); if (n != NULL) - (void) rip_append(last, ip, n, &ripsrc); + (void) rip_append(last, ip, n, &ripsrc); /* XXX count dropped packet */ INP_RUNLOCK(last); + last = NULL; } INP_RLOCK(inp); - last = inp; - if (__predict_false(inp->inp_flags2 & INP_FREED)) { - last = NULL; - INP_RUNLOCK(inp); + if (__predict_false(inp->inp_flags2 & INP_FREED)) + goto skip_1; + if (jailed_without_vnet(inp->inp_cred)) { + /* + * XXX: If faddr was bound to multicast group, + * jailed raw socket will drop datagram. + */ + if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0) + goto skip_1; } + last = inp; + continue; + skip_1: + INP_RUNLOCK(inp); } CK_LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[0], inp_hash) { if (inp->inp_ip_p && inp->inp_ip_p != proto) @@ -350,6 +352,19 @@ rip_input(struct mbuf **mp, int *offp, int proto) if (!in_nullhost(inp->inp_faddr) && !in_hosteq(inp->inp_faddr, ip->ip_src)) continue; + if (last != NULL) { + struct mbuf *n; + + n = m_copym(m, 0, M_COPYALL, M_NOWAIT); + if (n != NULL) + (void) rip_append(last, ip, n, &ripsrc); + /* XXX count dropped packet */ + INP_RUNLOCK(last); + last = NULL; + } + INP_RLOCK(inp); + if (__predict_false(inp->inp_flags2 & INP_FREED)) + goto skip_2; if (jailed_without_vnet(inp->inp_cred)) { /* * Allow raw socket in jail to receive multicast; @@ -358,7 +373,7 @@ rip_input(struct mbuf **mp, int *offp, int proto) */ if (!IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) && prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0) - continue; + goto skip_2; } /* * If this raw socket has multicast state, and we @@ -399,20 +414,13 @@ rip_input(struct mbuf **mp, int *offp, int proto) if (blocked != MCAST_PASS) { IPSTAT_INC(ips_notmember); - continue; + goto skip_2; } } - if (last != NULL) { - struct mbuf *n; - - n = m_copym(m, 0, M_COPYALL, M_NOWAIT); - if (n != NULL) - (void) rip_append(last, ip, n, &ripsrc); - /* XXX count dropped packet */ - INP_RUNLOCK(last); - } - INP_RLOCK(inp); last = inp; + continue; + skip_2: + INP_RUNLOCK(inp); } INP_INFO_RUNLOCK(&V_ripcbinfo); if (last != NULL) {