diff -Nru grub-2.04/grub-core/fs/ext2.c grub-2.04/grub-core/fs/ext2.c
--- grub-2.04/grub-core/fs/ext2.c	2019-04-23 10:54:47.000000000 +0200
+++ grub-2.04/grub-core/fs/ext2.c	2023-03-04 14:37:37.639563356 +0100
@@ -102,6 +102,8 @@
 #define EXT4_FEATURE_INCOMPAT_64BIT		0x0080
 #define EXT4_FEATURE_INCOMPAT_MMP		0x0100
 #define EXT4_FEATURE_INCOMPAT_FLEX_BG		0x0200
+#define EXT4_FEATURE_INCOMPAT_CSUM_SEED		0x2000
+#define EXT4_FEATURE_INCOMPAT_LARGEDIR		0x4000 /* >2GB or 3 level htree */
 #define EXT4_FEATURE_INCOMPAT_ENCRYPT          0x10000
 
 /* The set of back-incompatible features this driver DOES support. Add (OR)
@@ -124,7 +126,9 @@
  *                 RO driver.
  */
 #define EXT2_DRIVER_IGNORED_INCOMPAT ( EXT3_FEATURE_INCOMPAT_RECOVER \
-				     | EXT4_FEATURE_INCOMPAT_MMP)
+				     | EXT4_FEATURE_INCOMPAT_MMP \
+				     | EXT4_FEATURE_INCOMPAT_CSUM_SEED \
+				     | EXT4_FEATURE_INCOMPAT_LARGEDIR)
 
 
 #define EXT3_JOURNAL_MAGIC_NUMBER	0xc03b3998U