From patchwork Mon Feb 28 17:25:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 546981 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD228C433FE for ; Mon, 28 Feb 2022 18:11:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232819AbiB1SLh (ORCPT ); Mon, 28 Feb 2022 13:11:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241330AbiB1SJr (ORCPT ); Mon, 28 Feb 2022 13:09:47 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10FCFB2533; Mon, 28 Feb 2022 09:49:52 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A48F3B81085; Mon, 28 Feb 2022 17:49:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F2256C340F0; Mon, 28 Feb 2022 17:49:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1646070590; bh=GCSuhudy+EoWfGl+etGbjGYE4CLlfJerNz4VeCQwXh8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nORkQk5Uchy2mnceeqCzYlDf6nXz8AoEWrr/vZoNvzExNLagfk3VJGuXpS9MmOaLP KlUGDC6pkPPCIfRm7+Yegk34xC/pT6n9GUuQcLc5mNtgTbWnR/bJhnwG6aPJEP+HXW jF3oSAkArmSPdMu99TMlAaYNm2Gn1zBkJ+OKed5Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miaohe Lin , Mike Rapoport Subject: [PATCH 5.16 164/164] memblock: use kfree() to release kmalloced memblock regions Date: Mon, 28 Feb 2022 18:25:26 +0100 Message-Id: <20220228172414.476506653@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220228172359.567256961@linuxfoundation.org> References: <20220228172359.567256961@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Miaohe Lin commit c94afc46cae7ad41b2ad6a99368147879f4b0e56 upstream. memblock.{reserved,memory}.regions may be allocated using kmalloc() in memblock_double_array(). Use kfree() to release these kmalloced regions indicated by memblock_{reserved,memory}_in_slab. Signed-off-by: Miaohe Lin Fixes: 3010f876500f ("mm: discard memblock data later") Signed-off-by: Mike Rapoport Signed-off-by: Greg Kroah-Hartman --- mm/memblock.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) --- a/mm/memblock.c +++ b/mm/memblock.c @@ -366,14 +366,20 @@ void __init memblock_discard(void) addr = __pa(memblock.reserved.regions); size = PAGE_ALIGN(sizeof(struct memblock_region) * memblock.reserved.max); - memblock_free_late(addr, size); + if (memblock_reserved_in_slab) + kfree(memblock.reserved.regions); + else + memblock_free_late(addr, size); } if (memblock.memory.regions != memblock_memory_init_regions) { addr = __pa(memblock.memory.regions); size = PAGE_ALIGN(sizeof(struct memblock_region) * memblock.memory.max); - memblock_free_late(addr, size); + if (memblock_memory_in_slab) + kfree(memblock.memory.regions); + else + memblock_free_late(addr, size); } memblock_memory = NULL;