From: Richard Haines <redacted>
Date: Mon,  5 Jun 2017 16:44:40 +0100

When using CALIPSO with IPPROTO_UDP it is possible to trigger a GPF as the
IP header may have moved.

Also update the payload length after adding the CALIPSO option.

Signed-off-by: Richard Haines <redacted>

Applied and queued up for -stable, thank you Richard.
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