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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 11:31:11 +0000 (14:31 +0300)
commit	f4a4a18ecbdb74da70679c7bcaa395f66b68c4af
tree	1148a9344f4be60ad83ac9b3c5bfda236a21d757	tree \| snapshot
parent	9ef5a358378423a1208bee73b9cb3381f27cd3c2	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