linux-kernel - Re: [syzbot] kernel panic: kernel stack overflow

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Message-ID: <Y0a88zDFLVeVzBPB@nanopsycho>
Date:   Wed, 12 Oct 2022 15:11:15 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot <syzbot+60748c96cf5c6df8e581@...kaller.appspotmail.com>,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] kernel panic: kernel stack overflow

Wed, Oct 12, 2022 at 09:53:27AM CEST, dvyukov@...gle.com wrote:
>On Wed, 12 Oct 2022 at 09:48, syzbot
><syzbot+60748c96cf5c6df8e581@...kaller.appspotmail.com> wrote:
>>
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    bbed346d5a96 Merge branch 'for-next/core' into for-kernelci
>> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
>> console output: https://syzkaller.appspot.com/x/log.txt?x=14a03a2a880000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=aae2d21e7dd80684
>> dashboard link: https://syzkaller.appspot.com/bug?extid=60748c96cf5c6df8e581
>> compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
>> userspace arch: arm64
>>
>> Unfortunately, I don't have any reproducer for this issue yet.
>>
>> Downloadable assets:
>> disk image: https://storage.googleapis.com/syzbot-assets/11078f50b80b/disk-bbed346d.raw.xz
>> vmlinux: https://storage.googleapis.com/syzbot-assets/398e5f1e6c84/vmlinux-bbed346d.xz
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+60748c96cf5c6df8e581@...kaller.appspotmail.com
>
>+Jiri
>
>It looks like the issue is with the team device. It seems to call
>itself infinitely.
>team_device_event was mentioned in stack overflow bugs in the past:
>https://groups.google.com/g/syzkaller-bugs/search?q=%22team_device_event%22

Hi, do you have dmesg output available by any chance?

Thanks!