Date: Sat, 7 Aug 2021 15:30:25 GMT From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 784692c74019 - main - sctp: improve handling of IPv4 addresses on IPV6 sockets Reported by: syzbot+08fe66e4bfc2777cba95@syzkaller.appspotmail.com MFC after: 3 days Message-ID: <202108071530.177FUPab051337@gitrepo.freebsd.org>
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The branch main has been updated by tuexen: URL: https://cgit.FreeBSD.org/src/commit/?id=784692c74019fa69b5298fb1693a97f107c56b4b commit 784692c74019fa69b5298fb1693a97f107c56b4b Author: Michael Tuexen <tuexen@FreeBSD.org> AuthorDate: 2021-08-07 15:27:56 +0000 Commit: Michael Tuexen <tuexen@FreeBSD.org> CommitDate: 2021-08-07 15:27:56 +0000 sctp: improve handling of IPv4 addresses on IPV6 sockets Reported by: syzbot+08fe66e4bfc2777cba95@syzkaller.appspotmail.com MFC after: 3 days --- sys/netinet6/sctp6_usrreq.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/sys/netinet6/sctp6_usrreq.c b/sys/netinet6/sctp6_usrreq.c index 6f5d639e6367..fcbb566b53d3 100644 --- a/sys/netinet6/sctp6_usrreq.c +++ b/sys/netinet6/sctp6_usrreq.c @@ -771,7 +771,8 @@ sctp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, return (EINVAL); } } - if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + if ((addr->sa_family == AF_INET6) && + IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { struct sockaddr_in sin; /* convert v4-mapped into v4 addr and send */ @@ -909,7 +910,8 @@ sctp6_connect(struct socket *so, struct sockaddr *addr, struct thread *p) return (EINVAL); } } - if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { + if ((addr->sa_family == AF_INET6) && + IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { /* convert v4-mapped into v4 addr */ in6_sin6_2_sin(&store.sin, sin6); addr = &store.sa;
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