SCTP: Add scope_id validation for link-local binds SCTP currently permits users to bind to link-local addresses, but doesn't verify that the scope id specified at bind matches the interface that the address is configured on. It was report that this can hang a system. Signed-off-by: Vlad Yasevich Signed-off-by: Greg Kroah-Hartman Signed-off-by: Willy Tarreau --- net/sctp/ipv6.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index ef36be0..c00c73c 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -874,6 +874,10 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) dev = dev_get_by_index(addr->v6.sin6_scope_id); if (!dev) return 0; + if (!ipv6_chk_addr(&addr->v6.sin6_addr, dev, 0)) { + dev_put(dev); + return 0; + } dev_put(dev); } af = opt->pf->af; -- 1.5.2.5 -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/