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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no 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 E3EDAC64E7B for ; Tue, 1 Dec 2020 07:45:07 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DA0D92087C for ; Tue, 1 Dec 2020 07:45:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA0D92087C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id F1AEB6B0036; Tue, 1 Dec 2020 02:45:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id ECAEA8D0002; Tue, 1 Dec 2020 02:45:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DE1BA8D0001; Tue, 1 Dec 2020 02:45:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0058.hostedemail.com [216.40.44.58]) by kanga.kvack.org (Postfix) with ESMTP id C8C8E6B0036 for ; Tue, 1 Dec 2020 02:45:05 -0500 (EST) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 905681F0A for ; Tue, 1 Dec 2020 07:45:05 +0000 (UTC) X-FDA: 77543927370.16.nut17_390fd91273a8 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin16.hostedemail.com (Postfix) with ESMTP id 677F4100E6903 for ; Tue, 1 Dec 2020 07:45:05 +0000 (UTC) X-HE-Tag: nut17_390fd91273a8 X-Filterd-Recvd-Size: 2484 Received: from out30-43.freemail.mail.aliyun.com (out30-43.freemail.mail.aliyun.com [115.124.30.43]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Tue, 1 Dec 2020 07:45:04 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04420;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=17;SR=0;TI=SMTPD_---0UH7dQ8L_1606808694; Received: from IT-FVFX43SYHV2H.local(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0UH7dQ8L_1606808694) by smtp.aliyun-inc.com(127.0.0.1); Tue, 01 Dec 2020 15:44:55 +0800 Subject: Re: BUG: KASAN: null-ptr-deref in workingset_eviction+0xf2/0x1e0 To: Naresh Kamboju , inux-kernel@vger.kernel.org, linux-mm , Cgroups , Linux-Next Mailing List , lkft-triage@lists.linaro.org Cc: Andrew Morton , Johannes Weiner , Shakeel Butt , Roman Gushchin , Stephen Rothwell , Muchun Song , alexander.h.duyck@linux.intel.com, Yafang Shao , richard.weiyang@gmail.co, Michal Hocko , Vlastimil Babka References: From: Alex Shi Message-ID: <58f66f22-fd5f-685d-e608-99c35d89c1a3@linux.alibaba.com> Date: Tue, 1 Dec 2020 15:44:50 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: =E5=9C=A8 2020/12/1 =E4=B8=8A=E5=8D=883:52, Naresh Kamboju =E5=86=99=E9=81= =93: > Crash log: > ----------- > ioctl_sg01.c:81: TINFO: Found SCSI device /dev/sg1 > [ 285.862123] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > [ 285.863025] BUG: KASAN: null-ptr-deref in workingset_eviction+0xf2/0= x1e0 > [ 285.863025] Read of size 4 at addr 00000000000000c8 by task kswapd0/= 245 Hi Naresh, Good to know you again. :) Would you like to use command to check whichh line cause the panic: scripts/faddr2line vmlinux workingset_eviction+0xf2/0x1e0 I can't reproduce it. and my gcc version mismatch with yours. Thanks Alex