diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 4065336ebd1f..0a0b0a1af769 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -6094,12 +6094,9 @@ static int rbd_dev_v2_snap_context(struct rbd_device *rbd_dev,
 
 	/*
 	 * Make sure the reported number of snapshot ids wouldn't go
-	 * beyond the end of our buffer.  But before checking that,
-	 * make sure the computed size of the snapshot context we
-	 * allocate is representable in a size_t.
+	 * beyond the end of our buffer.
 	 */
-	if (snap_count > (SIZE_MAX - sizeof (struct ceph_snap_context))
-				 / sizeof (u64)) {
+	if (snap_count > RBD_MAX_SNAP_COUNT) {
 		ret = -EINVAL;
 		goto out;
 	}