linux-kernel - Re: [syzbot] BUG: corrupted list in netif_napi

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Message-ID: <CACT4Y+bhSEMPO4wi+eS75G3FKBR-USF9a9EniLHFmg8rynBV3w@mail.gmail.com>
Date:   Tue, 14 Dec 2021 18:56:53 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+62e474dd92a35e3060d8@...kaller.appspotmail.com>
Cc:     alexandr.lobakin@...el.com, andrii@...nel.org, ast@...nel.org,
        bpf@...r.kernel.org, daniel@...earbox.net, davem@...emloft.net,
        edumazet@...gle.com, hawk@...nel.org, hdanton@...a.com,
        jesse.brandeburg@...el.com, joamaki@...il.com,
        john.fastabend@...il.com, kafai@...com, kpsingh@...nel.org,
        kuba@...nel.org, linux-kernel@...r.kernel.org, maximmi@...dia.com,
        netdev@...r.kernel.org, pabeni@...hat.com, saeedm@...dia.com,
        songliubraving@...com, syzkaller-bugs@...glegroups.com,
        toke@...e.dk, vladbu@...dia.com, yhs@...com
Subject: Re: [syzbot] BUG: corrupted list in netif_napi_add

On Tue, 14 Dec 2021 at 08:52, syzbot
<syzbot+62e474dd92a35e3060d8@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 0315a075f1343966ea2d9a085666a88a69ea6a3d
> Author: Alexander Lobakin <alexandr.lobakin@...el.com>
> Date:   Wed Nov 10 19:56:05 2021 +0000
>
>     net: fix premature exit from NAPI state polling in napi_disable()
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=138dffbeb00000
> start commit:   911e3a46fb38 net: phy: Fix unsigned comparison with less t..
> git tree:       net-next
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d36d2402e8523638
> dashboard link: https://syzkaller.appspot.com/bug?extid=62e474dd92a35e3060d8
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=141592f2b00000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: net: fix premature exit from NAPI state polling in napi_disable()
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection


Looks reasonable based on the subsystem:

#syz fix: net: fix premature exit from NAPI state polling in napi_disable()