From d6dd218da2f8dd56ad7a563d9924222fd9770443 Mon Sep 17 00:00:00 2001
From: Yufen Yu <yuyufen@huawei.com>
Date: Sat, 19 Jun 2021 15:50:05 +0800
Subject: [PATCH] block: call bdput() to avoid memleak

hulk inclusion
category: bugfix
bugzilla: 109288
CVE: NA

-------------------------------------------------

bdget_disk() will get bd_inode, so it need to do bdput().

Fixes: 3ad15d050daa ("block: take bd_mutex around delete_partitions in del_gendisk")
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 block/genhd.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/genhd.c b/block/genhd.c
index b5820cf94b5d..a906426b5f4f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -783,8 +783,10 @@ void del_gendisk(struct gendisk *disk)
 		delete_partition(disk, part->partno);
 	}
 	disk_part_iter_exit(&piter);
-	if (bdev)
+	if (bdev) {
 		mutex_unlock(&bdev->bd_mutex);
+		bdput(bdev);
+	}
 
 	invalidate_partition(disk, 0);
 	bdev_unhash_inode(disk_devt(disk));
-- 
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