Don't call PageGetSpecialPointer() on page until it's been initialized. After calling XLogInitBufferForRedo(), the page might be all-zeros if it was not in page cache already. btree_xlog_unlink_page initialized the page correctly, but it called PageGetSpecialPointer before initializing it, which would lead to a corrupt page at WAL replay, if the unlinked page is not in page cache.
Backpatch to 9.4, the bug came with the rewrite of B-tree page deletion. Branch ------ master Details ------- http://git.postgresql.org/pg/commitdiff/fdf28853ae6a397497b79fea69f89f4f7b9aa991 Modified Files -------------- src/backend/access/nbtree/nbtxlog.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
