Clear data so random memory does not get freed. Will backport.
diff --git a/Misc/NEWS b/Misc/NEWS
index 83f3da1..87379b1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -636,6 +636,8 @@
Extension Modules
-----------------
+- Bug #1721309: prevent bsddb module from freeing random memory.
+
- Bug #1686475: Support stat'ing open files on Windows again.
- Patch #1185447: binascii.b2a_qp() now correctly quotes binary characters
diff --git a/Modules/_bsddb.c b/Modules/_bsddb.c
index ed7eb68..cc99926 100644
--- a/Modules/_bsddb.c
+++ b/Modules/_bsddb.c
@@ -1731,6 +1731,7 @@
return NULL;
}
+ CLEAR_DBT(data);
flags |= DB_GET_BOTH;
if (CHECK_DBFLAG(self, DB_THREAD)) {