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[209.85.220.69]) by mx.google.com with SMTPS id i13sor2722531ion.48.2019.03.11.06.08.01 for (Google Transport Security); Mon, 11 Mar 2019 06:08:01 -0700 (PDT) Received-SPF: pass (google.com: domain of 3sv2gxakbahagmnyozzsfoddwr.uccuzsigsfqcbhsbh.qca@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) client-ip=209.85.220.69; Authentication-Results: mx.google.com; spf=pass (google.com: domain of 3sv2gxakbahagmnyozzsfoddwr.uccuzsigsfqcbhsbh.qca@m3kw2wvrgufz5godrsrytgd7.apphosting.bounces.google.com designates 209.85.220.69 as permitted sender) smtp.mailfrom=3sV2GXAkbAHAgmnYOZZSfOddWR.UccUZSigSfQcbhSbh.Qca@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com 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 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: 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")