linux-kernel - Re: WARNING: CPU: 1

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Date:   Mon, 28 Sep 2020 11:30:56 +0200
From:   Arend Van Spriel <arend.vanspriel@...adcom.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>,
        syzbot <syzbot+3640e696903873858f7e@...kaller.appspotmail.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Johannes Berg <johannes@...solutions.net>,
        linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: WARNING: CPU: 1

On 9/27/2020 10:47 AM, Dmitry Vyukov wrote:
> On Sun, Sep 27, 2020 at 10:38 AM syzbot
> <syzbot+3640e696903873858f7e@...kaller.appspotmail.com> wrote:
>>
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
>> git tree:       net-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
>> dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
>> compiler:       gcc (GCC) 10.1.0-syz 20200507
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000
> 
> Based on the reproducer, this looks like some wireless bug.
> +net/wireless maintainers.

I don't think so looking at this part of the stacktrace:

[   51.814941]  [<ffffffff8465cc95>] macvlan_common_newlink+0xa15/0x1720
[   51.833542]  [<ffffffff84662548>] macvtap_newlink+0x128/0x230
[   51.858008]  [<ffffffff85b68bfe>] rtnl_newlink+0xe5e/0x1780
[   51.925885]  [<ffffffff85b5d32b>] rtnetlink_rcv_msg+0x22b/0xc20

Regards,
Arend

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