From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: Re: BUG: unable to handle kernel NULL pointer dereference in mem16_serial_out Date: Mon, 09 Dec 2019 17:38:01 -0800 Message-ID: <00000000000003cc8505994f9036@google.com> References: <00000000000044a65205994a7e13@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Return-path: In-Reply-To: <00000000000044a65205994a7e13@google.com> Sender: linux-kernel-owner@vger.kernel.org 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 List-Id: linux-api@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