Port from SAMBA tdb: commit a91bcbccf8a2243dac57cacec6fdfc9907580f69 Author: Jim...

Detect tight loop in tdb_find()

diff --git a/lib/tdb/common/tdb.c b/lib/tdb/common/tdb.c
index 767452c9b34b520a51bed6aace888b3f5b2dcd4f..b4dc86a82cb13d61bb5cc43dbeeb61bfc35ec9e4 100644 (file)
--- a/lib/tdb/common/tdb.c
+++ b/lib/tdb/common/tdb.c
@@ -96,6 +96,11 @@ static tdb_off_t tdb_find(struct tdb_context *tdb, TDB_DATA key, uint32_t hash,
                                      NULL) == 0) {
                        return rec_ptr;
                }
+               /* detect tight infinite loop */
+               if (rec_ptr == r->next) {
+                       TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_find: loop detected.\n"));
+                       return TDB_ERRCODE(TDB_ERR_CORRUPT, 0);
+               }
                rec_ptr = r->next;
        }
        return TDB_ERRCODE(TDB_ERR_NOEXIST, 0);