linux-kernel - Re: unregister_netdevice: waiting for DEV to become free

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Message-ID: <CACT4Y+bNWOsq4ZABF67ye6SMddfffEvmdUzu9EfEr77j7XpzRA@mail.gmail.com>
Date:   Wed, 1 Aug 2018 11:14:43 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Steffen Klassert <steffen.klassert@...unet.com>
Cc:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        syzbot <syzbot+2dfb68e639f0621b19fb@...kaller.appspotmail.com>,
        Dan Streetman <ddstreet@...e.org>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: unregister_netdevice: waiting for DEV to become free

On Wed, Aug 1, 2018 at 10:57 AM, Steffen Klassert
<steffen.klassert@...unet.com> wrote:
> On Tue, Jul 31, 2018 at 01:31:52PM +0200, Steffen Klassert wrote:
>> On Tue, Jul 31, 2018 at 08:16:22PM +0900, Tetsuo Handa wrote:
>> > Steffen and Herbert,
>> >
>> > Do you have any question? I think I provided enough information for debugging.
>>
>> It seems that I was not on Cc at the beginning of the threat,
>> so I had to search the web for some context.
>>
>> I'm currently trying your reproducer (still with my .config) but I don't
>> hit the problem.
>
> Actually, I did not hit it because it is already fixed in my tree.
>
> It is fixed by:
>
> commit 8cc88773855f988d6a3bbf102bbd9dd9c828eb81
> xfrm: fix missing dst_release() after policy blocking lbcast and multicast
>
> This fix went to mainline on Monday.

Thanks, let's tell syzbot:

#syz fix:
xfrm: fix missing dst_release() after policy blocking lbcast and multicast