git: 946fc2cb7320 - stable/13 - sctp: improve input validation of mapped addresses in send() Reported by: syzbot+35528f275f2eea6317cc@syzkaller.appspotmail.com Reported by: syzbot+ac29916d5f16d241553d@syzkaller.appspotmail.com
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Date: Tue, 22 Feb 2022 22:29:30 UTC
The branch stable/13 has been updated by tuexen: URL: https://cgit.FreeBSD.org/src/commit/?id=946fc2cb73209033ca823cba8fda0b6177815ebe commit 946fc2cb73209033ca823cba8fda0b6177815ebe Author: Michael Tuexen <tuexen@FreeBSD.org> AuthorDate: 2021-08-07 12:50:40 +0000 Commit: Michael Tuexen <tuexen@FreeBSD.org> CommitDate: 2022-02-22 22:28:53 +0000 sctp: improve input validation of mapped addresses in send() Reported by: syzbot+35528f275f2eea6317cc@syzkaller.appspotmail.com Reported by: syzbot+ac29916d5f16d241553d@syzkaller.appspotmail.com (cherry picked from commit b732091a761a04c7a04229f28642d27dc48485d8) --- sys/netinet/sctp_output.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sys/netinet/sctp_output.c b/sys/netinet/sctp_output.c index 786e9240b636..0f4ddd40753c 100644 --- a/sys/netinet/sctp_output.c +++ b/sys/netinet/sctp_output.c @@ -12449,9 +12449,13 @@ sctp_sosend(struct socket *so, } addr_to_use = addr; #if defined(INET) && defined(INET6) - if ((addr) && (addr->sa_family == AF_INET6)) { + if ((addr != NULL) && (addr->sa_family == AF_INET6)) { struct sockaddr_in6 *sin6; + if (addr->sa_len != sizeof(struct sockaddr_in6)) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); + return (EINVAL); + } sin6 = (struct sockaddr_in6 *)addr; if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { in6_sin6_2_sin(&sin, sin6);