Date: Wed, 10 Jul 2019 16:07:25 +0900
From: Michael Paquier <michael@paquier.xyz>
To: Andres Freund <andres@anarazel.de>
Cc: Alexander Lakhin <exclusion@gmail.com>, pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #15899: Valgrind detects errors on create gist index
Message-ID: <20190710070725.GA5042@paquier.xyz>
References: <15899-0d24fb273b3dd90c@postgresql.org>
 <38f18230-e766-3a87-e3ad-fef6562c0c23@gmail.com>
 <20190709044341.GA23827@paquier.xyz>
 <20190709205925.5p7yu65a32yjzn5q@alap3.anarazel.de>
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On Tue, Jul 09, 2019 at 01:59:25PM -0700, Andres Freund wrote:
> I think this is just that openssl bug we've been talking about a while
> ago. keep_current_best is initialized via random(), which is in turn
> initialized with openssl's randomness (cf InitProcessGlobals()). As
> valgrind - legitimately - thinks that the openssl' random value is
> tainted by uninitialized data, it thinks that keep_current_best is
> uninitialized. And the branches above are the first values where a jump
> is made based on that uninitialized data.

Yes, thanks for reminding of that issue:
https://www.postgresql.org/message-id/20190611205131.e5trufqahzpiwut6@alap3.anarazel.de
I completely forgot about it, and I am now on 1.1.1c on my dev
machine, so this explains that.
--
Michael

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