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author	Alexander Korotkov <akorotkov@postgresql.org>
	Sun, 23 Apr 2023 10:58:25 +0000 (13:58 +0300)
committer	Alexander Korotkov <akorotkov@postgresql.org>
	Sun, 23 Apr 2023 11:30:51 +0000 (14:30 +0300)
commit	214495dc5b712552d3938d5f03acddfedc8a81ca
tree	5ac8d90068912eb8f0e5f60c1c339e863af05ceb	tree \| snapshot
parent	6e7361c85e95a09ee0d1fbb2f8460962b86489ab	commit \| diff

Validate ltree siglen GiST option to be int-aligned

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

Mirror of https://git.postgresql.org/git/postgresql.git

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contrib/ltree/expected/ltree.out		diff \| blob \| blame \| history
contrib/ltree/ltree_gist.c		diff \| blob \| blame \| history
contrib/ltree/sql/ltree.sql		diff \| blob \| blame \| history
doc/src/sgml/ltree.sgml		diff \| blob \| blame \| history