+ mm-memremap-fix-missing-call-to-untrack_pfn-in-pagemap_range.patch added to mm-hotfixes-unstable branch

+ mm-memremap-fix-missing-call-to-untrack_pfn-in-pagemap_range.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/memremap: fix missing call to untrack_pfn() in pagemap_range()
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-memremap-fix-missing-call-to-untrack_pfn-in-pagemap_range.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memremap-fix-missing-call-to-untrack_pfn-in-pagemap_range.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/memremap: fix missing call to untrack_pfn() in pagemap_range()
Date: Tue, 31 May 2022 20:26:43 +0800

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@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memremap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memremap.c~mm-memremap-fix-missing-call-to-untrack_pfn-in-pagemap_range
+++ a/mm/memremap.c
@@ -214,7 +214,7 @@ 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();
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

maintainers-add-maintainer-information-for-z3fold.patch
mm-memremap-fix-missing-call-to-untrack_pfn-in-pagemap_range.patch
mm-shmemc-clean-up-comment-of-shmem_swapin_folio.patch
mm-reduce-the-rcu-lock-duration.patch
mm-migration-remove-unneeded-lock-page-and-pagemovable-check.patch
mm-migration-return-errno-when-isolate_huge_page-failed.patch
mm-migration-fix-potential-pte_unmap-on-an-not-mapped-pte.patch