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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 02ED8C10F06 for ; Mon, 11 Mar 2019 13:08:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C60142084F for ; Mon, 11 Mar 2019 13:08:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727461AbfCKNIC (ORCPT ); Mon, 11 Mar 2019 09:08:02 -0400 Received: from mail-it1-f199.google.com ([209.85.166.199]:51190 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727337AbfCKNIB (ORCPT ); Mon, 11 Mar 2019 09:08:01 -0400 Received: by mail-it1-f199.google.com with SMTP id i63so4951456itb.0 for ; Mon, 11 Mar 2019 06:08:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=jV0TIOFNu+hVCGZgL94GVpwyNNbbjqUpazKlNnc3uFo=; b=Rkvq4wIBLy64VxBvwNJaTLkDdCPwpj5eWQISpeqgpTMl8Xc6ff8pioeLFBdWWXk/J6 it2txT29z/3UGQMS0l/A2gUS6ggtHnzmiaR3BDICTlrh0P3pBB7pxiSus3f+IQgLZYhI b4uv1TYHFlAdaoPABFqYnVIFCYK9l44gyCocw1yHv0s0b26YkOfdhLu/qq+ouCv06rUi eoWJQ4NwgmuRKM16I8va3T9MhJ0NDL5P1Z09UW24Nys6kUM49KzFNjFkIRTUkaBaBFRU B3veCg4+4JU1qlyykHuWdS4s1BgmFjBOb6Omv+Z47lCldPh3lGp9dP4wkjQ/CK75PmCl yeew== X-Gm-Message-State: APjAAAUYwWsRAOo55BaKTwVAW54PSQVYsdJHSXEoZQ9nvNIa9aDeog9r DVklarFzRpkTWNy2ZNTR96h4dCNPr2qX1Na3Sh1WSurNu3kR X-Google-Smtp-Source: APXvYqxMWqYladm/NuaaRcwSzK/ttla74H8jKKFHCdgh/T+j32JYKNzD0KzruYXhlxc68jbCk92jCqJ8tzbdub8vUeRjgDEPOdul MIME-Version: 1.0 X-Received: by 2002:a5d:954c:: with SMTP id a12mr19448883ios.14.1552309681113; Mon, 11 Mar 2019 06:08:01 -0700 (PDT) Date: Mon, 11 Mar 2019 06:08:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001fd5780583d1433f@google.com> Subject: KASAN: null-ptr-deref Read in reclaim_high From: syzbot To: akpm@linux-foundation.org, 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 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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")