diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 65c6a3c..e83f1db 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -78,7 +78,9 @@
 
 static int sg_get_reserved_size(request_queue_t *q, int __user *p)
 {
-	return put_user(q->sg_reserved_size, p);
+	unsigned val = min(q->sg_reserved_size, q->max_sectors << 9);
+
+	return put_user(val, p);
 }
 
 static int sg_set_reserved_size(request_queue_t *q, int __user *p)