From 1669d857a25d62c6d0a6d9216e01c21287a7c844 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Tue, 3 Jul 2007 14:29:23 -0400 Subject: [PATCH] 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: David S. Miller --- net/sctp/ipv6.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 84cd53635f..2c29394fd9 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -844,6 +844,10 @@ static int sctp_inet6_bind_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; -- 2.39.5