Re: segfault in HEAD when too many nested functions call

On Sat, Jul 15, 2017 at 11:22:37AM -0400, Tom Lane wrote:
> Julien Rouhaud <julien(dot)rouhaud(at)dalibo(dot)com> writes:
> > Since b8d7f053c5c2bf2a7e8734fe3327f6a8bc711755 (Andres in Cc), if you
> > write queries which result in infinite recursion (or just too many
> > nested function calls), execution ends with segfault instead of intended
> > exhausted max_stack_depth:
>
> Yes. We discussed this before the patch went in [1]. I wanted to put
> a stack depth check in ExecProcNode(), and still do. Andres demurred,
> claiming that that was too much overhead, but didn't really provide a
> credible alternative. The thread drifted off without any resolution,
> but clearly we need to do something before 10.0 final.

[Action required within three days. This is a generic notification.]

The above-described topic is currently a PostgreSQL 10 open item. Andres,
since you committed the patch believed to have created it, you own this open
item. If some other commit is more relevant or if this does not belong as a
v10 open item, please let us know. Otherwise, please observe the policy on
open item ownership[1] and send a status update within three calendar days of
this message. Include a date for your subsequent status update. Testers may
discover new open items at any time, and I want to plan to get them all fixed
well in advance of shipping v10. Consequently, I will appreciate your efforts
toward speedy resolution. Thanks.

[1] https://www.postgresql.org/message-id/20170404140717.GA2675809%40tornado.leadboat.com