Andrew Gierth 3836d4b643 pg_trgm: fix crash in 2-item picksplit ... Whether from size overflow in gistSplit or from secondary splits, picksplit is (rarely) called with exactly two items to split. Formerly, due to special-case handling of the last item, this would lead to access to an uninitialized cache entry; prior to PG 13 this might have been harmless or at worst led to an incorrect union datum, but in 13 onwards it can cause a backend crash from using an uninitialized pointer. Repair by removing the special case, which was deemed not to have been appropriate anyway. Backpatch all the way, because this bug has existed since pg_trgm was added. Per report on IRC from user "ftzdomino". Analysis and testing by me, patch from Alexander Korotkov. Discussion: https://postgr.es/m/87k0usfdxg.fsf@news-spur.riddles.org.uk		2020-11-12 14:34:37 +00:00
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data
expected
sql
.gitignore
Makefile
pg_trgm--1.0--1.1.sql
pg_trgm--1.1--1.2.sql
pg_trgm--1.2--1.3.sql	Make contrib modules' installation scripts more secure.	2020-08-10 10:44:42 -04:00
pg_trgm--1.3--1.4.sql
pg_trgm--1.3.sql
pg_trgm--1.4--1.5.sql	Fix typo in contrib/pg_trgm/pg_trgm--1.4--1.5.sql	2020-11-12 08:55:09 +03:00
pg_trgm.control
trgm_gin.c
trgm_gist.c	pg_trgm: fix crash in 2-item picksplit	2020-11-12 14:34:37 +00:00
trgm_op.c
trgm_regexp.c	Spelling adjustments	2020-06-09 10:41:41 +02:00
trgm.h