linux-kernel - [PATCH 5.15 623/667] mm/memremap: fix missing call to untrack_pfn() in pagemap

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Message-Id: <20220607164953.354471855@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:04:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Miaohe Lin <linmiaohe@...wei.com>,
        David Hildenbrand <david@...hat.com>,
        Muchun Song <songmuchun@...edance.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Oscar Salvador <osalvador@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 5.15 623/667] mm/memremap: fix missing call to untrack_pfn() in pagemap_range()

From: Miaohe Lin <linmiaohe@...wei.com>

commit a04e1928e2ead144dc2f369768bc0a0f3110af89 upstream.

We forget to call untrack_pfn() to pair with track_pfn_remap() when range
is not allowed to hotplug.  Fix it by jump err_kasan.

Link: https://lkml.kernel.org/r/20220531122643.25249-1-linmiaohe@huawei.com
Fixes: bca3feaa0764 ("mm/memory_hotplug: prevalidate the address range being added with platform")
Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
Acked-by: Muchun Song <songmuchun@...edance.com>
Cc: Anshuman Khandual <anshuman.khandual@....com>
Cc: Oscar Salvador <osalvador@...e.de>
Cc: <stable@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 mm/memremap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -245,7 +245,7 @@ static int pagemap_range(struct dev_page
 
 	if (!mhp_range_allowed(range->start, range_len(range), !is_private)) {
 		error = -EINVAL;
-		goto err_pfn_remap;
+		goto err_kasan;
 	}
 
 	mem_hotplug_begin();