Date: Thu, 16 May 2019 09:05:16 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r347665 - stable/11/sys/netinet Message-ID: <201905160905.x4G95GFE034508@repo.freebsd.org>
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Author: tuexen Date: Thu May 16 09:05:15 2019 New Revision: 347665 URL: https://svnweb.freebsd.org/changeset/base/347665 Log: MFC r344723: Handle the case when calling the IPPROTO_SCTP level socket option SCTP_STATUS on an association with no primary path (early state). This issue was found by running syzkaller. Modified: stable/11/sys/netinet/sctp_usrreq.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/sctp_usrreq.c ============================================================================== --- stable/11/sys/netinet/sctp_usrreq.c Thu May 16 09:03:48 2019 (r347664) +++ stable/11/sys/netinet/sctp_usrreq.c Thu May 16 09:05:15 2019 (r347665) @@ -2644,42 +2644,47 @@ flags_out: sstat->sstat_instrms = stcb->asoc.streamincnt; sstat->sstat_outstrms = stcb->asoc.streamoutcnt; sstat->sstat_fragmentation_point = sctp_get_frag_point(stcb, &stcb->asoc); - memcpy(&sstat->sstat_primary.spinfo_address, - &stcb->asoc.primary_destination->ro._l_addr, - ((struct sockaddr *)(&stcb->asoc.primary_destination->ro._l_addr))->sa_len); net = stcb->asoc.primary_destination; - ((struct sockaddr_in *)&sstat->sstat_primary.spinfo_address)->sin_port = stcb->rport; - /* - * Again the user can get info from sctp_constants.h - * for what the state of the network is. - */ - if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { - /* It's unconfirmed */ - sstat->sstat_primary.spinfo_state = SCTP_UNCONFIRMED; - } else if (net->dest_state & SCTP_ADDR_REACHABLE) { - /* It's active */ - sstat->sstat_primary.spinfo_state = SCTP_ACTIVE; - } else { - /* It's inactive */ - sstat->sstat_primary.spinfo_state = SCTP_INACTIVE; - } - sstat->sstat_primary.spinfo_cwnd = net->cwnd; - sstat->sstat_primary.spinfo_srtt = net->lastsa >> SCTP_RTT_SHIFT; - sstat->sstat_primary.spinfo_rto = net->RTO; - sstat->sstat_primary.spinfo_mtu = net->mtu; - switch (stcb->asoc.primary_destination->ro._l_addr.sa.sa_family) { + if (net != NULL) { + memcpy(&sstat->sstat_primary.spinfo_address, + &stcb->asoc.primary_destination->ro._l_addr, + ((struct sockaddr *)(&stcb->asoc.primary_destination->ro._l_addr))->sa_len); + ((struct sockaddr_in *)&sstat->sstat_primary.spinfo_address)->sin_port = stcb->rport; + /* + * Again the user can get info from + * sctp_constants.h for what the state of + * the network is. + */ + if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { + /* It's unconfirmed */ + sstat->sstat_primary.spinfo_state = SCTP_UNCONFIRMED; + } else if (net->dest_state & SCTP_ADDR_REACHABLE) { + /* It's active */ + sstat->sstat_primary.spinfo_state = SCTP_ACTIVE; + } else { + /* It's inactive */ + sstat->sstat_primary.spinfo_state = SCTP_INACTIVE; + } + sstat->sstat_primary.spinfo_cwnd = net->cwnd; + sstat->sstat_primary.spinfo_srtt = net->lastsa >> SCTP_RTT_SHIFT; + sstat->sstat_primary.spinfo_rto = net->RTO; + sstat->sstat_primary.spinfo_mtu = net->mtu; + switch (stcb->asoc.primary_destination->ro._l_addr.sa.sa_family) { #if defined(INET) - case AF_INET: - sstat->sstat_primary.spinfo_mtu -= SCTP_MIN_V4_OVERHEAD; - break; + case AF_INET: + sstat->sstat_primary.spinfo_mtu -= SCTP_MIN_V4_OVERHEAD; + break; #endif #if defined(INET6) - case AF_INET6: - sstat->sstat_primary.spinfo_mtu -= SCTP_MIN_OVERHEAD; - break; + case AF_INET6: + sstat->sstat_primary.spinfo_mtu -= SCTP_MIN_OVERHEAD; + break; #endif - default: - break; + default: + break; + } + } else { + memset(&sstat->sstat_primary, 0, sizeof(struct sctp_paddrinfo)); } sstat->sstat_primary.spinfo_assoc_id = sctp_get_associd(stcb); SCTP_TCB_UNLOCK(stcb);
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