diff --git a/block/parallels.c b/block/parallels.c
index 7f0f72e879..fd1e2860d0 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -512,7 +512,11 @@ parallels_co_check(BlockDriverState *bs, BdrvCheckResult *res,
     prev_off = 0;
     for (i = 0; i < s->bat_size; i++) {
         int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS;
-        if (off == 0) {
+        /*
+         * If BDRV_FIX_ERRORS is not set, out-of-image BAT entries were not
+         * fixed. Skip not allocated and out-of-image BAT entries.
+         */
+        if (off == 0 || off + s->cluster_size > res->image_end_offset) {
             prev_off = 0;
             continue;
         }