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-rw-r--r--net/sctp/socket.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 2a2e094560de..80835ac26d2c 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -357,11 +357,14 @@ static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
if (!opt->pf->af_supported(addr->sa.sa_family, opt))
return NULL;
- /* V4 mapped address are really of AF_INET family */
- if (addr->sa.sa_family == AF_INET6 &&
- ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
- !opt->pf->af_supported(AF_INET, opt))
- return NULL;
+ if (addr->sa.sa_family == AF_INET6) {
+ if (len < SIN6_LEN_RFC2133)
+ return NULL;
+ /* V4 mapped address are really of AF_INET family */
+ if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
+ !opt->pf->af_supported(AF_INET, opt))
+ return NULL;
+ }
/* If we get this far, af is valid. */
af = sctp_get_af_specific(addr->sa.sa_family);