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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>
This commit is contained in:
Vlad Yasevich 2007-07-03 14:29:23 -04:00 committed by David S. Miller
parent f50f95cab7
commit 1669d857a2
1 changed files with 4 additions and 0 deletions
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4
net/sctp/ipv6.c
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@ -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;