Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 3 May 2023 11:34:33 +0100
From:   "Russell King (Oracle)" <linux@armlinux.org.uk>
To:     Dmitry Vyukov <dvyukov@google.com>
Cc:     syzbot <syzbot+0827f43974813b74e6db@syzkaller.appspotmail.com>,
        bristot@redhat.com, bsegall@google.com, dietmar.eggemann@arm.com,
        hannes@cmpxchg.org, juri.lelli@redhat.com,
        linux-kernel@vger.kernel.org, mgorman@suse.de, mingo@redhat.com,
        peterz@infradead.org, rostedt@goodmis.org, surenb@google.com,
        syzkaller-bugs@googlegroups.com, vincent.guittot@linaro.org,
        vschneid@redhat.com,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [syzbot] upstream boot error: BUG: unable to handle kernel NULL
 pointer dereference in psi_task_switch
Message-ID: <ZFI4ue1uzd0Il9yM@shell.armlinux.org.uk>
References: <000000000000281ae805faa4844e@google.com>
 <CACT4Y+Z+N9P6H8ZmF=TGfrC26r1LhHW7OT__UWKTh5VJOWnjEg@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CACT4Y+Z+N9P6H8ZmF=TGfrC26r1LhHW7OT__UWKTh5VJOWnjEg@mail.gmail.com>
Sender: Russell King (Oracle) <linux@armlinux.org.uk>
Precedence: bulk

On Tue, May 02, 2023 at 08:37:15AM +0200, Dmitry Vyukov wrote:
> On Mon, 1 May 2023 at 18:43, syzbot
> <syzbot+0827f43974813b74e6db@syzkaller.appspotmail.com> wrote:
> >
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    89d77f71f493 Merge tag 'riscv-for-linus-6.4-mw1' of git://..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=1113550c280000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=4cc65ccad523b604
> > dashboard link: https://syzkaller.appspot.com/bug?extid=0827f43974813b74e6db
> > compiler:       arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> > userspace arch: arm
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+0827f43974813b74e6db@syzkaller.appspotmail.com
> 
> +arm mailing list
> 
> Kernel started falling apart on arm during boot in various strange ways.

Are these all the same hardware platform? If so, please check the
hardware with a known working kernel. These look like spurious failts
caused possibly the hardware platform failing.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!