Date: Thu, 10 Oct 2019 14:51:38 +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-12@freebsd.org Subject: svn commit: r353400 - stable/12/sys/netinet Message-ID: <201910101451.x9AEpcOK068837@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: tuexen Date: Thu Oct 10 14:51:38 2019 New Revision: 353400 URL: https://svnweb.freebsd.org/changeset/base/353400 Log: MFC r353123: Fix a use after free bug when removing remote addresses. This bug was found by OSS-Fuzz and reported in https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18004 Modified: stable/12/sys/netinet/sctp_asconf.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/sctp_asconf.c ============================================================================== --- stable/12/sys/netinet/sctp_asconf.c Thu Oct 10 14:50:44 2019 (r353399) +++ stable/12/sys/netinet/sctp_asconf.c Thu Oct 10 14:51:38 2019 (r353400) @@ -283,7 +283,7 @@ sctp_process_asconf_add_ip(struct sockaddr *src, struc static int sctp_asconf_del_remote_addrs_except(struct sctp_tcb *stcb, struct sockaddr *src) { - struct sctp_nets *src_net, *net; + struct sctp_nets *src_net, *net, *nnet; /* make sure the source address exists as a destination net */ src_net = sctp_findnet(stcb, src); @@ -293,10 +293,9 @@ sctp_asconf_del_remote_addrs_except(struct sctp_tcb *s } /* delete all destination addresses except the source */ - TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { if (net != src_net) { /* delete this address */ - sctp_remove_net(stcb, net); SCTPDBG(SCTP_DEBUG_ASCONF1, "asconf_del_remote_addrs_except: deleting "); SCTPDBG_ADDR(SCTP_DEBUG_ASCONF1, @@ -304,6 +303,7 @@ sctp_asconf_del_remote_addrs_except(struct sctp_tcb *s /* notify upper layer */ sctp_ulp_notify(SCTP_NOTIFY_ASCONF_DELETE_IP, stcb, 0, (struct sockaddr *)&net->ro._l_addr, SCTP_SO_NOT_LOCKED); + sctp_remove_net(stcb, net); } } return (0);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201910101451.x9AEpcOK068837>