From: Xiao Ni <xni@redhat.com>
Date: Thu, 12 May 2022 09:21:09 +0000 (+0800)
Subject: md: fix double free of io_acct_set bioset
X-Git-Tag: v5.17.14~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f99d5b5dc8a42c807b5f1176b925aa45d61962ab;p=thirdparty%2Fkernel%2Fstable.git

md: fix double free of io_acct_set bioset

commit 42b805af102471f53e3c7867b8c2b502ea4eef7e upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index f156678c08bc9..43c5890dc9f35 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5600,8 +5600,6 @@ 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);
 }
 
@@ -6288,8 +6286,6 @@ 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);