ITS#7377 Catch mdb_put() to blocked/read-only txns

...early enough that txn state is left unchanged.

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 532d94a..39d890e 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -8602,6 +8602,9 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi,
        if (flags & ~(MDB_NOOVERWRITE|MDB_NODUPDATA|MDB_RESERVE|MDB_APPEND|MDB_APPENDDUP))
                return EINVAL;
 
+       if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED))
+               return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN;
+
        mdb_cursor_init(&mc, txn, dbi, &mx);
        return mdb_cursor_put(&mc, key, data, flags);
 }