diff --git a/block/ioctl.c b/block/ioctl.c
index f856963204f4949f5197c1cb0c0a247ca12c95da..656c8c6ed206f876bbdbd0f240dedf9997a88cf0 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -45,6 +45,9 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
 				    || pstart < 0 || plength < 0 || partno > 65535)
 					return -EINVAL;
 			}
+			/* check if partition is aligned to blocksize */
+			if (p.start & (bdev_logical_block_size(bdev) - 1))
+				return -EINVAL;
 
 			mutex_lock(&bdev->bd_mutex);