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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-07-03 14:29:23 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-05 17:40:15 -0700
commit1669d857a25d62c6d0a6d9216e01c21287a7c844 (patch)
treedfe9ae301c96947e7bde1c9a69b5d0b376901ebb
parentf50f95cab735ebe2993e8d1549f0615bad05f3f2 (diff)
downloadlinux-stericsson-1669d857a25d62c6d0a6d9216e01c21287a7c844.tar.gz
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: David S. Miller <davem@davemloft.net>
-rw-r--r--net/sctp/ipv6.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 84cd53635fe8..2c29394fd92e 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;