Subject: pgsql: Add stack depth check to QueueFKConstraintValidation().

From: Tom Lane <[email-masked]>
Date: Tue, 26 May 2026 15:58:33 +0000

Add stack depth check to QueueFKConstraintValidation().

QueueFKConstraintValidation() recurses through the partition hierarchy
to queue child constraint validations and to mark child rows as
validated.  With a sufficiently deep partition tree, this can result
in a stack-overflow crash.  Defend against that as we do elsewhere.

Bug: #19482
Reported-by: Alexander Lakhin <[email-masked]>
Author: Ayush Tiwari <[email-masked]>
Reviewed-by: Tom Lane <[email-masked]>
Discussion: https://postgr.es/m/[email-masked]
Backpatch-through: 18

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/0480d84ee35f386d3d78b58488303f9f6ba1b4c2

Modified Files
--------------
src/backend/commands/tablecmds.c | 3 +++
1 file changed, 3 insertions(+)