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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 6FA95C43381 for ; Mon, 11 Mar 2019 23:37:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 33F9B2087C for ; Mon, 11 Mar 2019 23:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552347472; bh=j5ykj7uQK8UxtRUbvSqhF/KYo9f3skYTK9Wb8Qb5Zhc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=vBhbZTc9Hylt2XkeWj8CXqi4liCh7FhbD2FxpmSk/xtnmRzlH3UDYb7YL1/aic4b0 JY/YEwON+Bf/jwqMsDL/9PJ4h7AgpqnkKfzPAXp99ZjMg6AqU4UdBmwEOOwFdUfLJc jpT2e2244oZbycooJwW4bRoUzM9DlOkAChOFq+fQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726510AbfCKXhv (ORCPT ); Mon, 11 Mar 2019 19:37:51 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:37188 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725865AbfCKXhu (ORCPT ); Mon, 11 Mar 2019 19:37:50 -0400 Received: from localhost.localdomain (c-73-223-200-170.hsd1.ca.comcast.net [73.223.200.170]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 6555AD2E; Mon, 11 Mar 2019 23:37:49 +0000 (UTC) Date: Mon, 11 Mar 2019 16:37:47 -0700 From: Andrew Morton To: syzbot Cc: cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, mhocko@suse.com, sfr@canb.auug.org.au, shakeelb@google.com, syzkaller-bugs@googlegroups.com, vdavydov.dev@gmail.com Subject: Re: KASAN: null-ptr-deref Read in reclaim_high Message-Id: <20190311163747.f56cceebd9c2661e4519bdfc@linux-foundation.org> In-Reply-To: <0000000000001fd5780583d1433f@google.com> References: <0000000000001fd5780583d1433f@google.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 11 Mar 2019 06:08:01 -0700 syzbot wrote: > syzbot has bisected this bug to: > > commit 29a4b8e275d1f10c51c7891362877ef6cffae9e7 > Author: Shakeel Butt > Date: Wed Jan 9 22:02:21 2019 +0000 > > memcg: schedule high reclaim for remote memcgs on high_work > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=155bf5db200000 > start commit: 29a4b8e2 memcg: schedule high reclaim for remote memcgs on.. > git tree: linux-next > final crash: https://syzkaller.appspot.com/x/report.txt?x=175bf5db200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=135bf5db200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=611f89e5b6868db > dashboard link: https://syzkaller.appspot.com/bug?extid=fa11f9da42b46cea3b4a > userspace arch: amd64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14259017400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=141630a0c00000 > > Reported-by: syzbot+fa11f9da42b46cea3b4a@syzkaller.appspotmail.com > Fixes: 29a4b8e2 ("memcg: schedule high reclaim for remote memcgs on > high_work") The following patch memcg-schedule-high-reclaim-for-remote-memcgs-on-high_work-v3.patch might have fixed this. Was it applied?