Merge branch 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-6.3

Pull MD fixes from Song:

"This set contains two fixes for old issues (by Neil) and one fix
 for 6.3 (by Xiao)."

* 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md: select BLOCK_LEGACY_AUTOLOAD
  md: avoid signed overflow in slot_store()
  md: Free resources in __md_stop

Author: axboe

drivers/md/Kconfig

@@ -15,6 +15,10 @@ if MD
 config BLK_DEV_MD
 	tristate "RAID support"
 	select BLOCK_HOLDER_DEPRECATED if SYSFS
+	# BLOCK_LEGACY_AUTOLOAD requirement should be removed
+	# after relevant mdadm enhancements - to make "names=yes"
+	# the default - are widely available.
+	select BLOCK_LEGACY_AUTOLOAD
 	help
 	  This driver lets you combine several hard disk partitions into one
 	  logical block device. This can be used to simply append one

drivers/md/md.c

@@ -3128,6 +3128,9 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len)
 		err = kstrtouint(buf, 10, (unsigned int *)&slot);
 		if (err < 0)
 			return err;
+		if (slot < 0)
+			/* overflow */
+			return -ENOSPC;
 	}
 	if (rdev->mddev->pers && slot == -1) {
 		/* Setting 'slot' on an active array requires also
@@ -6256,6 +6259,11 @@ static void __md_stop(struct mddev *mddev)
 		mddev->to_remove = &md_redundancy_group;
 	module_put(pers->owner);
 	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+
+	percpu_ref_exit(&mddev->writes_pending);
+	percpu_ref_exit(&mddev->active_io);
+	bioset_exit(&mddev->bio_set);
+	bioset_exit(&mddev->sync_set);
 }
 
 void md_stop(struct mddev *mddev)
@@ -6265,10 +6273,6 @@ void md_stop(struct mddev *mddev)
 	 */
 	__md_stop_writes(mddev);
 	__md_stop(mddev);
-	percpu_ref_exit(&mddev->writes_pending);
-	percpu_ref_exit(&mddev->active_io);
-	bioset_exit(&mddev->bio_set);
-	bioset_exit(&mddev->sync_set);
 }
 
 EXPORT_SYMBOL_GPL(md_stop);
@@ -7839,11 +7843,6 @@ static void md_free_disk(struct gendisk *disk)
 {
 	struct mddev *mddev = disk->private_data;
 
-	percpu_ref_exit(&mddev->writes_pending);
-	percpu_ref_exit(&mddev->active_io);
-	bioset_exit(&mddev->bio_set);
-	bioset_exit(&mddev->sync_set);
-
 	mddev_free(mddev);
 }