From c88fee3c266ce5147abf2f4efd9bed4249e122d4 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Sun, 22 Jul 2007 18:24:56 +0200 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: Adrian Bunk --- net/sctp/ipv6.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index c068d53e5415..ab1c01a1d0f9 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -840,6 +840,10 @@ 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; -- 2.39.5