From 9fed42d2acb7f7a1ec3487c96fcc70729ca9dfd9 Mon Sep 17 00:00:00 2001
From: LDA <lda@ari.lt>
Date: Mon, 9 Sep 2024 13:05:30 +0200
Subject: [PATCH] [FIX] Fix LMDB use-after-free

---
 src/Db/LMDB.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Db/LMDB.c b/src/Db/LMDB.c
index 044c439..f1c743c 100644
--- a/src/Db/LMDB.c
+++ b/src/Db/LMDB.c
@@ -293,6 +293,7 @@ LMDBUnlock(Db *d, DbRef *r)
     Stream *stream;
     MDB_val key, val;
     bool ret = true;
+    DbHint hint = r ? r->hint : 0;
 
     if (!d || !r)
     {
@@ -324,7 +325,7 @@ LMDBUnlock(Db *d, DbRef *r)
     {
         free(val.mv_data);
     }
-    if (ret && r->hint == DB_HINT_WRITE)
+    if (ret && hint == DB_HINT_WRITE)
     {
         pthread_mutex_unlock(&d->lock);
     }
-- 
2.45.2