diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9714db3..1147994 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -386,6 +386,9 @@ struct ext4_mount_options {
 #endif
 };
 
+/* Max physical block we can addres w/o extents */
+#define EXT4_MAX_BLOCK_FILE_PHYS	0xFFFFFFFF
+
 /*
  * Structure of an inode on the disk
  */
@@ -841,6 +844,7 @@ struct ext4_sb_info {
 	unsigned long s_gdb_count;	/* Number of group descriptor blocks */
 	unsigned long s_desc_per_block;	/* Number of group descriptors per block */
 	ext4_group_t s_groups_count;	/* Number of groups in the fs */
+	ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */
 	unsigned long s_overhead_last;  /* Last calculated overhead */
 	unsigned long s_blocks_last;    /* Last seen block count */
 	loff_t s_bitmap_maxbytes;	/* max bytes for bitmap files */
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f9c642b..f716d49 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -551,15 +551,21 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
  *
  *	Normally this function find the preferred place for block allocation,
  *	returns it.
+ *	Because this is only used for non-extent files, we limit the block nr
+ *	to 32 bits.
  */
 static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block,
 				   Indirect *partial)
 {
+	ext4_fsblk_t goal;
+
 	/*
 	 * XXX need to get goal block from mballoc's data structures
 	 */
 
-	return ext4_find_near(inode, partial);
+	goal = ext4_find_near(inode, partial);
+	goal = goal & EXT4_MAX_BLOCK_FILE_PHYS;
+	return goal;
 }
 
 /**
@@ -640,6 +646,8 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
 		if (*err)
 			goto failed_out;
 
+		WARN_ON(current_block + count > EXT4_MAX_BLOCK_FILE_PHYS);
+
 		target -= count;
 		/* allocate blocks for indirect blocks */
 		while (index < indirect_blks && count) {
@@ -674,6 +682,7 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
 		ar.flags = EXT4_MB_HINT_DATA;
 
 	current_block = ext4_mb_new_blocks(handle, &ar, err);
+	WARN_ON(current_block + ar.len > EXT4_MAX_BLOCK_FILE_PHYS);
 
 	if (*err && (target == blks)) {
 		/*
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index cd25846..b87854b 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1943,6 +1943,10 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 	sb = ac->ac_sb;
 	sbi = EXT4_SB(sb);
 	ngroups = ext4_get_groups_count(sb);
+	/* non-extent files are limited to low blocks/groups */
+	if (!(EXT4_I(ac->ac_inode)->i_flags & EXT4_EXTENTS_FL))
+		ngroups = sbi->s_blockfile_groups;
+
 	BUG_ON(ac->ac_status == AC_STATUS_FOUND);
 
 	/* first, try the goal */
@@ -3382,6 +3386,11 @@ ext4_mb_use_preallocated(struct ext4_allocation_context *ac)
 			ac->ac_o_ex.fe_logical >= pa->pa_lstart + pa->pa_len)
 			continue;
 
+		/* non-extent files can't have physical blocks past 2^32 */
+		if (!(EXT4_I(ac->ac_inode)->i_flags & EXT4_EXTENTS_FL) &&
+			pa->pa_pstart + pa->pa_len > EXT4_MAX_BLOCK_FILE_PHYS)
+			continue;
+
 		/* found preallocated blocks, use them */
 		spin_lock(&pa->pa_lock);
 		if (pa->pa_deleted == 0 && pa->pa_free) {
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8f4f079..8dcdded 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2595,6 +2595,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 		goto failed_mount;
 	}
 	sbi->s_groups_count = blocks_count;
+	sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,
+			(EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb)));
 	db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) /
 		   EXT4_DESC_PER_BLOCK(sb);
 	sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *),
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 62b31c2..6bce3f8 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -810,12 +810,23 @@ inserted:
 			get_bh(new_bh);
 		} else {
 			/* We need to allocate a new block */
-			ext4_fsblk_t goal = ext4_group_first_block_no(sb,
+			ext4_fsblk_t goal, block;
+
+			goal = ext4_group_first_block_no(sb,
 						EXT4_I(inode)->i_block_group);
-			ext4_fsblk_t block = ext4_new_meta_blocks(handle, inode,
+
+			/* non-extent files can't have physical blocks past 2^32 */
+			if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+				goal = goal & EXT4_MAX_BLOCK_FILE_PHYS;
+
+			block = ext4_new_meta_blocks(handle, inode,
 						  goal, NULL, &error);
 			if (error)
 				goto cleanup;
+
+			if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+				WARN_ON(block > EXT4_MAX_BLOCK_FILE_PHYS);
+
 			ea_idebug(inode, "creating block %d", block);
 
 			new_bh = sb_getblk(sb, block);
