diff --git a/block/ioctl.c b/block/ioctl.c
index 0c76137adcaa..06ff3023e2a1 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -33,7 +33,7 @@ static int blkpg_do_ioctl(struct block_device *bdev,
 	if (op == BLKPG_DEL_PARTITION)
 		return bdev_del_partition(disk, p.pno);
 
-	if (p.start < 0 || p.length <= 0 || p.start + p.length < 0)
+	if (p.start < 0 || p.length <= 0 || LLONG_MAX - p.length < p.start)
 		return -EINVAL;
 	/* Check that the partition is aligned to the block size */
 	if (!IS_ALIGNED(p.start | p.length, bdev_logical_block_size(bdev)))