diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index b2f3c0c..2c2be33 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1558,7 +1558,8 @@ static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
         if (r->req.cmd.buf[1] & 0xe0) {
             goto fail;
         }
-        if (r->req.cmd.lba > s->qdev.max_lba) {
+        if (r->req.cmd.lba > r->req.cmd.lba + len
+        ||  r->req.cmd.lba + len > s->qdev.max_lba + 1) {
             goto illegal_lba;
         }
         r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
@@ -1581,7 +1582,8 @@ static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
         if (r->req.cmd.buf[1] & 0xe0) {
             goto fail;
         }
-        if (r->req.cmd.lba > s->qdev.max_lba) {
+        if (r->req.cmd.lba > r->req.cmd.lba + len
+        ||  r->req.cmd.lba + len > s->qdev.max_lba + 1) {
             goto illegal_lba;
         }
         r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);