From: Howard Chu <hyc@openldap.org>
Date: Wed, 16 Oct 2024 16:36:18 +0000 (+0100)
Subject: ITS#9920 lmdb: fix page offset when converting subpage to real page
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e7891c016a4518eaf0aa29f959b0cc8a22d4111;p=thirdparty%2Fopenldap.git

ITS#9920 lmdb: fix page offset when converting subpage to real page

offset needs to account for additional space at page tail
---

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 8863b6df5a..0dea5c63f4 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -8593,7 +8593,7 @@ prep_subDB:
 					if ((rc = mdb_page_alloc(mc, 1, &mp)))
 						return rc;
 					fp_flags |= mp->mp_flags; /* P_ADM_FLAGS */
-					offset = env->me_psize - olddata.mv_size;
+					offset = env->me_pagespace + PAGEHDRSZ - olddata.mv_size;
 					flags |= F_DUPDATA|F_SUBDATA;
 					dummy.md_root = mp->mp_pgno;
 					sub_root = mp;