From owner-svn-src-stable@freebsd.org Sun May 26 16:43:08 2019 Return-Path: Delivered-To: svn-src-stable@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 1725B15AAF72; Sun, 26 May 2019 16:43:08 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id AFB9E8D167; Sun, 26 May 2019 16:43:07 +0000 (UTC) (envelope-from tuexen@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 8BB721E57F; Sun, 26 May 2019 16:43:07 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x4QGh7n1015323; Sun, 26 May 2019 16:43:07 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x4QGh7uH015321; Sun, 26 May 2019 16:43:07 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201905261643.x4QGh7uH015321@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Sun, 26 May 2019 16:43:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r348289 - stable/12/sys/netinet X-SVN-Group: stable-12 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/12/sys/netinet X-SVN-Commit-Revision: 348289 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: AFB9E8D167 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.957,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 May 2019 16:43:08 -0000 Author: tuexen Date: Sun May 26 16:43:06 2019 New Revision: 348289 URL: https://svnweb.freebsd.org/changeset/base/348289 Log: MFC r347975: Improve input validation for the IPPROTO_SCTP level socket options SCTP_CONNECT_X and SCTP_CONNECT_X_DELAYED. MFC r347976: Allow sending on demand SCTP HEARTBEATS only in the ESTABLISHED state. This issue was found by running syzkaller. Modified: stable/12/sys/netinet/sctp_usrreq.c stable/12/sys/netinet/sctputil.c stable/12/sys/netinet/sctputil.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/sctp_usrreq.c ============================================================================== --- stable/12/sys/netinet/sctp_usrreq.c Sun May 26 15:44:58 2019 (r348288) +++ stable/12/sys/netinet/sctp_usrreq.c Sun May 26 16:43:06 2019 (r348289) @@ -1352,13 +1352,12 @@ static int sctp_do_connect_x(struct socket *so, struct sctp_inpcb *inp, void *optval, size_t optsize, void *p, int delay) { - int error = 0; + int error; int creat_lock_on = 0; struct sctp_tcb *stcb = NULL; struct sockaddr *sa; unsigned int num_v6 = 0, num_v4 = 0, *totaddrp, totaddr; uint32_t vrf_id; - int bad_addresses = 0; sctp_assoc_t *a_id; SCTPDBG(SCTP_DEBUG_PCB1, "Connectx called\n"); @@ -1397,17 +1396,12 @@ sctp_do_connect_x(struct socket *so, struct sctp_inpcb totaddrp = (unsigned int *)optval; totaddr = *totaddrp; sa = (struct sockaddr *)(totaddrp + 1); - stcb = sctp_connectx_helper_find(inp, sa, &totaddr, &num_v4, &num_v6, &error, (unsigned int)(optsize - sizeof(int)), &bad_addresses); - if ((stcb != NULL) || bad_addresses) { + error = sctp_connectx_helper_find(inp, sa, totaddr, &num_v4, &num_v6, (unsigned int)(optsize - sizeof(int))); + if (error != 0) { /* Already have or am bring up an association */ SCTP_ASOC_CREATE_UNLOCK(inp); creat_lock_on = 0; - if (stcb) - SCTP_TCB_UNLOCK(stcb); - if (bad_addresses == 0) { - SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EALREADY); - error = EALREADY; - } + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, error); goto out_now; } #ifdef INET6 @@ -5338,10 +5332,11 @@ sctp_setopt(struct socket *so, int optname, void *optv net->dest_state &= ~SCTP_ADDR_NOHB; } if (paddrp->spp_flags & SPP_HB_DEMAND) { - /* on demand HB */ - sctp_send_hb(stcb, net, SCTP_SO_LOCKED); - sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SOCKOPT, SCTP_SO_LOCKED); - sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); + if (SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) { + sctp_send_hb(stcb, net, SCTP_SO_LOCKED); + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SOCKOPT, SCTP_SO_LOCKED); + sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net); + } } if ((paddrp->spp_flags & SPP_PMTUD_DISABLE) && (paddrp->spp_pathmtu >= SCTP_SMALLEST_PMTU)) { if (SCTP_OS_TIMER_PENDING(&net->pmtu_timer.timer)) { Modified: stable/12/sys/netinet/sctputil.c ============================================================================== --- stable/12/sys/netinet/sctputil.c Sun May 26 15:44:58 2019 (r348288) +++ stable/12/sys/netinet/sctputil.c Sun May 26 16:43:06 2019 (r348289) @@ -6391,30 +6391,33 @@ out_now: return (added); } -struct sctp_tcb * +int sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr, - unsigned int *totaddr, - unsigned int *num_v4, unsigned int *num_v6, int *error, - unsigned int limit, int *bad_addr) + unsigned int totaddr, + unsigned int *num_v4, unsigned int *num_v6, + unsigned int limit) { struct sockaddr *sa; - struct sctp_tcb *stcb = NULL; + struct sctp_tcb *stcb; unsigned int incr, at, i; at = 0; sa = addr; - *error = *num_v6 = *num_v4 = 0; + *num_v6 = *num_v4 = 0; /* account and validate addresses */ - for (i = 0; i < *totaddr; i++) { + if (totaddr == 0) { + return (EINVAL); + } + for (i = 0; i < totaddr; i++) { + if (at + sizeof(struct sockaddr) > limit) { + return (EINVAL); + } switch (sa->sa_family) { #ifdef INET case AF_INET: incr = (unsigned int)sizeof(struct sockaddr_in); if (sa->sa_len != incr) { - SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); - *error = EINVAL; - *bad_addr = 1; - return (NULL); + return (EINVAL); } (*num_v4) += 1; break; @@ -6427,46 +6430,34 @@ sctp_connectx_helper_find(struct sctp_inpcb *inp, stru sin6 = (struct sockaddr_in6 *)sa; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* Must be non-mapped for connectx */ - SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); - *error = EINVAL; - *bad_addr = 1; - return (NULL); + return (EINVAL); } incr = (unsigned int)sizeof(struct sockaddr_in6); if (sa->sa_len != incr) { - SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL); - *error = EINVAL; - *bad_addr = 1; - return (NULL); + return (EINVAL); } (*num_v6) += 1; break; } #endif default: - *totaddr = i; - incr = 0; - /* we are done */ - break; + return (EINVAL); } - if (i == *totaddr) { - break; + if ((at + incr) > limit) { + return (EINVAL); } SCTP_INP_INCR_REF(inp); stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL); if (stcb != NULL) { - /* Already have or am bring up an association */ - return (stcb); + SCTP_TCB_UNLOCK(stcb); + return (EALREADY); } else { SCTP_INP_DECR_REF(inp); } - if ((at + incr) > limit) { - *totaddr = i; - break; - } + at += incr; sa = (struct sockaddr *)((caddr_t)sa + incr); } - return ((struct sctp_tcb *)NULL); + return (0); } /* Modified: stable/12/sys/netinet/sctputil.h ============================================================================== --- stable/12/sys/netinet/sctputil.h Sun May 26 15:44:58 2019 (r348288) +++ stable/12/sys/netinet/sctputil.h Sun May 26 16:43:06 2019 (r348289) @@ -211,10 +211,9 @@ int sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr, int totaddr, int *error); -struct sctp_tcb * -sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr, - unsigned int *totaddr, unsigned int *num_v4, unsigned int *num_v6, - int *error, unsigned int limit, int *bad_addr); +int +sctp_connectx_helper_find(struct sctp_inpcb *, struct sockaddr *, + unsigned int, unsigned int *, unsigned int *, unsigned int); int sctp_is_there_an_abort_here(struct mbuf *, int, uint32_t *); #ifdef INET6