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Validate ltree siglen GiST option to be int-aligned

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Unaligned siglen could lead to an unaligned access to subsequent key fields.

Backpatch to 13, where opclass options were introduced.

Reported-by: Alexander Lakhin
Bug: 17847
Discussion: https://postgr.es/m/17847-171232970bea406b%40postgresql.org
Reviewed-by: Tom Lane, Pavel Borisov, Alexander Lakhin
Backpatch-through: 13
This commit is contained in:
Alexander Korotkov
2023-04-23 13:58:25 +03:00
parent 6e7361c85e
commit 214495dc5b
4 changed files with 27 additions and 4 deletions
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2
contrib/ltree/sql/ltree.sql
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@ -325,6 +325,8 @@ SELECT * FROM ltreetest WHERE t ? '{23.*.1,23.*.2}' order by t asc;
drop index tstidx;
create index tstidx on ltreetest using gist (t gist_ltree_ops(siglen=0));
create index tstidx on ltreetest using gist (t gist_ltree_ops(siglen=2025));
create index tstidx on ltreetest using gist (t gist_ltree_ops(siglen=2028));
create index tstidx on ltreetest using gist (t gist_ltree_ops(siglen=2019));
create index tstidx on ltreetest using gist (t gist_ltree_ops(siglen=2024));
SELECT count(*) FROM ltreetest WHERE t < '12.3';