--- x/fs/udf/super.c
+++ y/fs/udf/super.c
@@ -2337,6 +2337,8 @@ static int udf_sync_fs(struct super_bloc
 		struct logicalVolIntegrityDesc *lvid;
 
 		lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+		WARN_ON(le16_to_cpu(lvid->descTag.descCRCLength) + sizeof(struct tag) >
+			sb->s_blocksize);
 		udf_finalize_lvid(lvid);
 
 		/*