diff --git a/fs/bcachefs/super-io.c b/fs/bcachefs/super-io.c
index ce7410d72089..428172897501 100644
--- a/fs/bcachefs/super-io.c
+++ b/fs/bcachefs/super-io.c
@@ -287,7 +287,7 @@ static int validate_sb_layout(struct bch_sb_layout *layout, struct printbuf *out
 		return -BCH_ERR_invalid_sb_layout_nr_superblocks;
 	}
 
-	max_sectors = 1 << layout->sb_max_size_bits;
+	max_sectors = 1 <<  min(BCH_SB_LAYOUT_SIZE_BITS_MAX, layout->sb_max_size_bits);
 
 	prev_offset = le64_to_cpu(layout->sb_offset[0]);