1 files changed, 2 insertions, 2 deletions
diff --git a/qemu-img.c b/qemu-img.c
index 76ac5d3..139eeb5 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -4488,10 +4488,10 @@ static void bench_cb(void *opaque, int ret)
          */
         b->in_flight++;
         b->offset += b->step;
-        if (b->image_size == 0) {
+        if (b->image_size <= b->bufsize) {
             b->offset = 0;
         } else {
-            b->offset %= b->image_size;
+            b->offset %= b->image_size - b->bufsize;
         }
         if (b->write) {
             acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b);