General Mills Inc. missed Wall Street estimates for quarterly profit on Tuesday, as the Cheerios cereal maker grappled with soaring prices of raw materials and higher costs of freight and labor. Shares of the Minneapolis, Minnesota-based company were down about 4 percent in premarket trade. Prolonged supply chain disruptions and a shortage of truck drivers in the United States have forced packaged food makers to incur higher costs, adding to spiraling prices of ingredients like wheat, corn and edible oils that have already crimped margins across the sector. To ease some of the cost pressures, General Mills, like peers Kraft Heinz Co. and Campbell Soup Co., has bumped up prices of its products. However, heightened inflation and supply costs in the quarter outstripped General Mills’ efforts to raise product prices, Chief Executive Officer Jeff Harmening said in his prepared remarks, adding the current environment is as “challenging as I have …