diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index fcee1f9c7fe3..f88be401befb 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2867,7 +2867,7 @@ static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
 		     !inode_is_locked(inode));
 	down_write(&EXT4_I(inode)->i_data_sem);
 	if (newsize > EXT4_I(inode)->i_disksize)
-		EXT4_I(inode)->i_disksize = newsize;
+		WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize);
 	up_write(&EXT4_I(inode)->i_data_sem);
 }
 
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 57118ba82929..8bfd1ea28234 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2564,7 +2564,7 @@ update_disksize:
 	 * truncate are avoided by checking i_size under i_data_sem.
 	 */
 	disksize = ((loff_t)mpd->first_page) << PAGE_SHIFT;
-	if (disksize > EXT4_I(inode)->i_disksize) {
+	if (disksize > READ_ONCE(EXT4_I(inode)->i_disksize)) {
 		int err2;
 		loff_t i_size;