jsonb_plperl, jsonb_plpython: Fix unguarded recursion and loops. Add check_stack_depth() to Jsonb_to_SV, SV_to_JsonbValue, PLyObject_FromJsonbContainer, and PLyObject_ToJsonbValue. Without this, deeply nested JSONB values can crash the backend with SIGSEGV instead of raising a proper error.
Also add CHECK_FOR_INTERRUPTS() to the while loop in SV_to_JsonbValue that dereferences chains of Perl references, so that a circular reference (e.g. $x = \$x) can be cancelled by the user instead of spinning indefinitely. (We looked at detecting such circular references, but it seems more trouble than it's worth.) Author: Aleksander Alekseev <[email protected]> Reviewed-by: Tom Lane <[email protected]> Discussion: https://postgr.es/m/CAJ7c6TPbjkzUk4qJ5dHvDNEz0hBuFue3A-XWz_=897z+bc+...@mail.gmail.com Backpatch-through: 14 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/da82fbb8f9a3b1e46b55d5975ef59113cd3a59a6 Modified Files -------------- contrib/jsonb_plperl/jsonb_plperl.c | 15 +++++++++++++++ contrib/jsonb_plpython/jsonb_plpython.c | 7 +++++++ 2 files changed, 22 insertions(+)
