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[209.132.180.67]) by mx.google.com with ESMTP id u16si1088637otq.92.2019.12.09.17.38.47; Mon, 09 Dec 2019 17:38:59 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726913AbfLJBiC (ORCPT + 99 others); Mon, 9 Dec 2019 20:38:02 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:44669 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726605AbfLJBiB (ORCPT ); Mon, 9 Dec 2019 20:38:01 -0500 Received: by mail-il1-f200.google.com with SMTP id h87so13131129ild.11 for ; Mon, 09 Dec 2019 17:38:01 -0800 (PST) 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:in-reply-to:message-id:subject :from:to; bh=d/rLwgpGcOLrJAfYzylpfLq8TO3Ppq0ukiadwzb7btY=; b=eRXsF6Zdw/ku8QVjKZaLEWiPhrXQzSjYmJM1YriDrna0cwUOF1hLm15RaTlNm4T7Gk 2ozMmnkGkOSFl6UlJhsnxQuFSaLtffw9Hx/pcAJSVsx274oOPneVZ8SUlbCPAo+dLrtZ IR2q2It+jhB3KmCBWEXWfs/yk8R0RI7xwCsJBfDKOdIrzkX6GKcXITpTP9nZQDyUPAXA XQkya/JPCEWb1zbdUPPu6+kIrw69JCp2Cjip03Rodq34bM+Bk8aDPiP/x4rtD/3UjlR8 MedhI+ntcX+EzdoHwfl7YQaF1KiasKvQZUXqHPmBLSCbfNu1h1hc7qM6u4B6t54whfNR oVJA== X-Gm-Message-State: APjAAAVBPHNLlI5OcRQbURcU3XC4RZHT9iKRgO1dbKuKu88OHiVxh7lz 9t4LKePWNGkJzJCf82lLQJ52eX8gc/fzdwxpPEjD5LZduXrE MIME-Version: 1.0 X-Received: by 2002:a6b:5b12:: with SMTP id v18mr24150486ioh.112.1575941881185; Mon, 09 Dec 2019 17:38:01 -0800 (PST) Date: Mon, 09 Dec 2019 17:38:01 -0800 In-Reply-To: <00000000000044a65205994a7e13@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000003cc8505994f9036@google.com> Subject: Re: BUG: unable to handle kernel NULL pointer dereference in mem16_serial_out From: syzbot To: andriy.shevchenko@linux.intel.com, asierra@xes-inc.com, corbet@lwn.net, ext-kimmo.rautkoski@vaisala.com, gregkh@linuxfoundation.org, jslaby@suse.com, kai.heng.feng@canonical.com, linux-api@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, mika.westerberg@linux.intel.com, paulburton@kernel.org, peter@hurleysoftware.com, sr@denx.de, syzkaller-bugs@googlegroups.com, yamada.masahiro@socionext.com, yegorslists@googlemail.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 bd94c4077a0b2ecc35562c294f80f3659ecd8499 Author: Masahiro Yamada Date: Wed Oct 28 03:46:05 2015 +0000 serial: support 16-bit register interface for console bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13723196e00000 start commit: e42617b8 Linux 5.5-rc1 git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=10f23196e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=17723196e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=3754e2c78c1adb82 dashboard link: https://syzkaller.appspot.com/bug?extid=92f32d4e21fb246d31a2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=136f7e41e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=112b7c82e00000 Reported-by: syzbot+92f32d4e21fb246d31a2@syzkaller.appspotmail.com Fixes: bd94c4077a0b ("serial: support 16-bit register interface for console") For information about bisection process see: https://goo.gl/tpsmEJ#bisection