From: Xiao Ni <xni@redhat.com>
Date: Thu, 12 May 2022 17:21:09 +0800
Subject: [PATCH] md: fix double free of io_acct_set bioset
Git-commit: 42b805af102471f53e3c7867b8c2b502ea4eef7e
Patch-mainline: v5.19
References: git-fixes

Now io_acct_set is alloc and free in personality. Remove the codes that
free io_acct_set in md_free and md_stop.

Fixes: 0c031fd37f69 (md: Move alloc/free acct bioset in to personality)
Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Acked-by: NeilBrown <neilb@suse.com>

---
 drivers/md/md.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5608,8 +5608,6 @@ static void md_free(struct kobject *ko)
 
 	bioset_exit(&mddev->bio_set);
 	bioset_exit(&mddev->sync_set);
-	if (mddev->level != 1 && mddev->level != 10)
-		bioset_exit(&mddev->io_acct_set);
 	kfree(mddev);
 }
 
@@ -6297,8 +6295,6 @@ void md_stop(struct mddev *mddev)
 	__md_stop(mddev);
 	bioset_exit(&mddev->bio_set);
 	bioset_exit(&mddev->sync_set);
-	if (mddev->level != 1 && mddev->level != 10)
-		bioset_exit(&mddev->io_acct_set);
 }
 
 EXPORT_SYMBOL_GPL(md_stop);