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fd1a30de makes a bug that it uses (struct page *) as zsmalloc's handle although it's a uncompressed page so that it can access random page, return random data or even crashed by get_first_page in zs_map_object. Cc: Seth Jennings <sjenning@linux.vnet.ibm.com> Cc: Jerome Marchand <jmarchan@redhat.com> Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>