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sctp: improve handling of IPv4 addresses on IPV6 sockets

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Reported by:	syzbot+08fe66e4bfc2777cba95@syzkaller.appspotmail.com

(cherry picked from commit 784692c740)
This commit is contained in:
Michael Tuexen 2021-08-07 17:27:56 +02:00
parent 4b3cfa86d0
commit 1d0d786f95
1 changed files with 4 additions and 2 deletions
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6
sys/netinet6/sctp6_usrreq.c
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@ -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;