linux-kernel - Re: [syzbot] INFO: task hung in register_netdevice

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Message-ID: <0000000000006bd5ff05c3ad37da@google.com>
Date:   Mon, 31 May 2021 22:00:10 -0700
From:   syzbot <syzbot+355f8edb2ff45d5f95fa@...kaller.appspotmail.com>
To:     a@...table.cc, ast@...nel.org, b.a.t.m.a.n@...ts.open-mesh.org,
        bpf@...r.kernel.org, brouer@...hat.com, daniel@...earbox.net,
        davem@...emloft.net, hawk@...nel.org, jakub.kicinski@...ronome.com,
        john.fastabend@...il.com, kafai@...com, kuba@...nel.org,
        linux-can@...r.kernel.org, linux-kernel@...r.kernel.org,
        mareklindner@...mailbox.ch, mkl@...gutronix.de,
        netdev@...r.kernel.org, socketcan@...tkopp.net,
        songliubraving@...com, sw@...onwunderlich.de,
        syzkaller-bugs@...glegroups.com, xdp-newbies@...r.kernel.org,
        yhs@...com
Subject: Re: [syzbot] INFO: task hung in register_netdevice_notifier (2)

syzbot has bisected this issue to:

commit 6bf071bf09d4b2ff3ee8783531e2ce814f0870cb
Author: Jesper Dangaard Brouer <brouer@...hat.com>
Date:   Tue Jun 18 13:05:27 2019 +0000

    xdp: page_pool related fix to cpumap

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1397c4a7d00000
start commit:   7ac3a1c1 Merge tag 'mtd/fixes-for-5.13-rc4' of git://git.k..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1057c4a7d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1797c4a7d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=266cda122a0b56c
dashboard link: https://syzkaller.appspot.com/bug?extid=355f8edb2ff45d5f95fa
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16cc630fd00000

Reported-by: syzbot+355f8edb2ff45d5f95fa@...kaller.appspotmail.com
Fixes: 6bf071bf09d4 ("xdp: page_pool related fix to cpumap")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection