From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Sun, 22 Jul 2007 16:24:56 +0000 (+0200)
Subject: SCTP: Add scope_id validation for link-local binds
X-Git-Tag: v2.6.16.53-rc1~3
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c88fee3c266ce5147abf2f4efd9bed4249e122d4;p=karo-tx-linux.git

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 <vladislav.yasevich@hp.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
---

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;