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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] sctp: update dst pmtu with the correct daddr
Date: Fri, 21 Sep 2018 07:45:24 -0700 (PDT)
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From: Xin Long <lucien.xin@gmail.com>
Date: Fri, 21 Sep 2018 15:55:34 +0800

> It's under the protection of the sock lock, I think any other places
> that want to access the address also need to acquire this sock lock
> first.

Hash table lookups don't even have a socket context yet, so can't hold
the sock lock, but look at the address for comparisons.

Anything visible in a table lookup has to have stable keying
information.