From patchwork Mon Sep 21 02:00:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Jun X-Patchwork-Id: 11788199 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2D06C6CA for ; Mon, 21 Sep 2020 02:03:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F1DCB2193E for ; Mon, 21 Sep 2020 02:03:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F1DCB2193E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D178B90001B; Sun, 20 Sep 2020 22:03:04 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id C7C9F900018; Sun, 20 Sep 2020 22:03:04 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B430590001B; Sun, 20 Sep 2020 22:03:04 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0188.hostedemail.com [216.40.44.188]) by kanga.kvack.org (Postfix) with ESMTP id 9925A900018 for ; Sun, 20 Sep 2020 22:03:04 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 61AE3181AEF1A for ; Mon, 21 Sep 2020 02:03:04 +0000 (UTC) X-FDA: 77285420688.19.camp11_101691227141 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin19.hostedemail.com (Postfix) with ESMTP id 4539E1AD1B7 for ; Mon, 21 Sep 2020 02:03:04 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,chenjun102@huawei.com,,RULES_HIT:30004:30054:30056:30090,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95;04yg5dugkm5u6eonmih33hwxmsttmop7jgyancfpxdwjiywdb58ja995fmxycgt.rd1munxme47ptu69byw49ubmjur5beyomcsdtu9ybctd9f73xmxjjmhsmy3qwi4.6-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: camp11_101691227141 X-Filterd-Recvd-Size: 2801 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Mon, 21 Sep 2020 02:03:03 +0000 (UTC) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id A86B3588FA98689880E4; 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 10:02:49 +0800 From: Chen Jun To: , CC: , , , Subject: [PATCH -next 5/5] mm/kmemleak-test: Add a test case for alloc_percpu Date: Mon, 21 Sep 2020 02:00:07 +0000 Message-ID: <20200921020007.35803-6-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 X-Originating-IP: [10.175.112.208] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: After insmod kmemleak-test.ko, a leaking for alloc_percpu will be reported as below: kmemleak: alloc_percpu(sizeof(*elem)) = 00007dfdd26a2c40 : : unreferenced object 0x7dfdd26a2c40 (size 8): comm "insmod", pid 183, jiffies 4294905864 (age 40.520s) hex dump (first 8 bytes): 00 00 00 00 00 00 00 00 ........ backtrace: [<(____ptrval____)>] pcpu_alloc+0x3ec/0x8c8 [<(____ptrval____)>] __alloc_percpu+0x18/0x28 [<(____ptrval____)>] 0xffff800008df525c [<(____ptrval____)>] do_one_initcall+0x60/0x1d8 [<(____ptrval____)>] do_init_module+0x58/0x1d0 [<(____ptrval____)>] load_module+0x1d8c/0x23d0 [<(____ptrval____)>] __do_sys_finit_module+0xdc/0xf8 [<(____ptrval____)>] __arm64_sys_finit_module+0x20/0x30 [<(____ptrval____)>] el0_svc_common.constprop.3+0x68/0x170 [<(____ptrval____)>] do_el0_svc+0x24/0x90 [<(____ptrval____)>] el0_sync_handler+0x13c/0x1a8 [<(____ptrval____)>] el0_sync+0x158/0x180 Signed-off-by: Wei Yongjun Signed-off-by: Chen Jun --- mm/kmemleak-test.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/kmemleak-test.c b/mm/kmemleak-test.c index 75fe1b8c3226..8f3e4a60166b 100644 --- a/mm/kmemleak-test.c +++ b/mm/kmemleak-test.c @@ -79,6 +79,9 @@ static int __init kmemleak_test_init(void) per_cpu(kmemleak_test_pointer, i)); } + pr_info("alloc_percpu(sizeof(*elem)) = %px\n", + alloc_percpu(sizeof(*elem))); + return 0; } module_init(kmemleak_test_init);