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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F044C6FA82 for ; Mon, 12 Sep 2022 05:59:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DAAE38D0002; Mon, 12 Sep 2022 01:59:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D5AC78D0001; Mon, 12 Sep 2022 01:59:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C48CE8D0002; Mon, 12 Sep 2022 01:59:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id B1DF98D0001 for ; Mon, 12 Sep 2022 01:59:53 -0400 (EDT) Received: from smtpin01.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 7B9C1A031A for ; Mon, 12 Sep 2022 05:59:53 +0000 (UTC) X-FDA: 79902382266.01.439C09A Received: from out30-45.freemail.mail.aliyun.com (out30-45.freemail.mail.aliyun.com [115.124.30.45]) by imf22.hostedemail.com (Postfix) with ESMTP id 6ABE8C00B9 for ; Mon, 12 Sep 2022 05:59:51 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R151e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=luoben@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0VPOQ3u0_1662962379; Received: from localhost(mailfrom:luoben@linux.alibaba.com fp:SMTPD_---0VPOQ3u0_1662962379) by smtp.aliyun-inc.com; Mon, 12 Sep 2022 13:59:45 +0800 From: Ben Luo To: cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: luoben@linux.alibaba.com Subject: [PATCH] mm/slub: return 0 when object pointer is NULL Date: Mon, 12 Sep 2022 13:59:39 +0800 Message-Id: <1662962379-16174-1-git-send-email-luoben@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1662962393; a=rsa-sha256; cv=none; b=H9qh61EC0XNlOAeI9taDHegtep0ejLYliGD4PDmBSb8gOkVqzRUbN4KnMU32EqK5O1gpJx x9gIbqv1pQyrD54mIr6DUk5U5YoudZmZcb55uJjY93gcEbhHw6+6w/Nuc5urYu3owHuRC9 FCRoy2SYEpooqRtuKJlAkSEkxJGJsmY= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=none; spf=pass (imf22.hostedemail.com: domain of luoben@linux.alibaba.com designates 115.124.30.45 as permitted sender) smtp.mailfrom=luoben@linux.alibaba.com; dmarc=pass (policy=none) header.from=alibaba.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1662962393; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=6dg+Lu1Bep7PnfC8XdEvo5IT5jfUK8MCbLJ7flDCQRM=; b=JGDB0vPnzTT+T/GDCBC9IowE9kIzNGrSd2O5iASGGDzE6iUJ+GcpC8P7u187ZyV6ws5c7K 6wOfNdUkA3dSOH3mOhKoBGxeSNPvRSuxUfw0L3fnNQIjan3LFH5kr3Y2wZTCX1CipHC5gg jgAO/g1q34OaDaX1PkVGo8yW3GXrJuo= X-Rspamd-Queue-Id: 6ABE8C00B9 Authentication-Results: imf22.hostedemail.com; dkim=none; spf=pass (imf22.hostedemail.com: domain of luoben@linux.alibaba.com designates 115.124.30.45 as permitted sender) smtp.mailfrom=luoben@linux.alibaba.com; dmarc=pass (policy=none) header.from=alibaba.com X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: ms3eo7rp5qjntm5wcxis4xgum83danau X-HE-Tag: 1662962391-654918 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: NULL is definitly not a valid address Signed-off-by: Ben Luo --- mm/slub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/slub.c b/mm/slub.c index 862dbd9..50fad18 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -674,7 +674,7 @@ static inline int check_valid_pointer(struct kmem_cache *s, void *base; if (!object) - return 1; + return 0; base = slab_address(slab); object = kasan_reset_tag(object); -- 1.8.3.1