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From: vaibhave postgres <[email protected]>
To: [email protected]
Subject: Rendezvous variables: safe to pass an access token between two extensions?
Date: Thu, 9 Jul 2026 16:06:58 +0530
Message-ID: <CAM_eQjy8rG7yExX5JMhA3UKycWfvtw6w-x-SBV+sPmKWAmXvMA@mail.gmail.com> (raw)

Hi all,

Extension A receives an access token and needs to hand it to extension B,
which publishes a handler function via a rendezvous variable
(find_rendezvous_variable).

Since rendezvous variables are just a global, name-keyed void * with no
notion of who populated the slot, is it safe to pass a sensitive value (the
token) this way? My worry is that another loaded module could register the
same name and receive the token instead of the intended extension B.

Is there a supported way to verify the publisher of a rendezvous variable,
or is there a better way to do this? Any prior art would help.

Thanks.

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