From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0D39C43466 for ; Mon, 21 Sep 2020 02:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A43D7214F1 for ; Mon, 21 Sep 2020 02:03:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726441AbgIUCC7 (ORCPT ); Sun, 20 Sep 2020 22:02:59 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:34140 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726316AbgIUCC5 (ORCPT ); Sun, 20 Sep 2020 22:02:57 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id A042E89730D559E4C866; Mon, 21 Sep 2020 10:02:55 +0800 (CST) Received: from mdc.huawei.com (10.175.112.208) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Mon, 21 Sep 2020 10:02:47 +0800 From: Chen Jun To: , CC: , , , Subject: [PATCH -next 2/5] mm/kmemleak: skip update_checksum for OBJECT_NO_SCAN objects Date: Mon, 21 Sep 2020 02:00:04 +0000 Message-ID: <20200921020007.35803-3-chenjun102@huawei.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200921020007.35803-1-chenjun102@huawei.com> References: <20200921020007.35803-1-chenjun102@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.112.208] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wei Yongjun Objects marked with OBJECT_NO_SCAN are never scanned. So there is no need to update checksum for them. Signed-off-by: Wei Yongjun Signed-off-by: Chen Jun --- mm/kmemleak.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index b3f603fd9fc3..c09c6b59eda6 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -1166,6 +1166,10 @@ static bool update_checksum(struct kmemleak_object *object) { u32 old_csum = object->checksum; + /* always return false for not scan object */ + if (object->flags & OBJECT_NO_SCAN) + return false; + kasan_disable_current(); kcsan_disable_current(); object->checksum = crc32(0, (void *)object->pointer, object->size); -- 2.25.0