From: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Justin Pryzby <pryzby(at)telsasoft(dot)com>, Devrim Gündüz <devrim(at)gunduz(dot)org>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: pg11.5: ExecHashJoinNewBatch: glibc detected...double free or corruption (!prev) |
Date: | 2019-08-27 22:52:49 |
Message-ID: | CAHyXU0xCz9JbtXLbW3mzwabGXXqqCtXnwksgLJaV1pgxHpDFWA@mail.gmail.com |
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On Mon, Aug 26, 2019 at 12:01 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Justin Pryzby <pryzby(at)telsasoft(dot)com> writes:
> > On Mon, Aug 26, 2019 at 12:45:24PM -0400, Tom Lane wrote:
> >> However ... there is some pretty interesting info at
> >> https://bugzilla.redhat.com/show_bug.cgi?id=1338673
> >> suggesting that compiling with a late-model gcc against older RHEL6
> >> headers could result in bad code. I wonder whether the reporters'
> >> servers were built using such a configuration. (Although the linkage,
> >> if any, to this report still wouldn't be very clear.)
>
> > I can tell it was compiled using
> > version | PostgreSQL 11.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23), 64-bit
>
> Ah, that appears to be the default compiler for RHEL6, so that theory
> is out the window. It's still interesting that we're only seeing this
> reported from RHEL6 ... maybe there's something specific to the code
> that this gcc version generates?
FWIW, I've got the same compiler (which is natural, we are likely
using the same packaging):
PostgreSQL 9.6.12 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.4.7 20120313
(Red Hat 4.4.7-23), 64-bit
merlin
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