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Subject[2.6.22.2 review 08/84] SCTP scope_id handling fix
From: Vlad Yasevich <vladislav.yasevich@hp.com>

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: Greg Kroah-Hartman <gregkh@suse.de>

---
net/sctp/ipv6.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -875,6 +875,10 @@ static int sctp_inet6_send_verify(struct
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;
--
-
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