sctp: verify length provided in heartbeat information parameter
If the variable parameter length provided in the mandatory heartbeat information parameter exceeds the calculated payload length the packet has been corrupted. Reply with a parameter length protocol violation message. Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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