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    Subject[PATCH 5.15 623/667] mm/memremap: fix missing call to untrack_pfn() in pagemap_range()
    Date
    From: Miaohe Lin <linmiaohe@huawei.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@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>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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();

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