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From: Aleksandr Nogikh <nogikh@google.com>
Date: Tue, 19 Mar 2024 14:31:35 +0100
Message-ID: <CANp29Y7SuK8P8xHa6JzAzs_NxPUN9AvFTiKfMhgLy1POGBodwA@mail.gmail.com>
Subject: Re: [syzbot] [batman?] [bpf?] possible deadlock in lock_timer_base
To: Sven Eckelmann <sven@narfation.org>
Cc: akpm@linux-foundation.org, andrii@kernel.org, ast@kernel.org, 
	b.a.t.m.a.n@lists.open-mesh.org, bpf@vger.kernel.org, christian@brauner.io, 
	daniel@iogearbox.net, dvyukov@google.com, edumazet@google.com, 
	elver@google.com, glider@google.com, hdanton@sina.com, jakub@cloudflare.com, 
	jannh@google.com, john.fastabend@gmail.com, kasan-dev@googlegroups.com, 
	kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, 
	mareklindner@neomailbox.ch, mark.rutland@arm.com, netdev@vger.kernel.org, 
	pabeni@redhat.com, shakeelb@google.com, syzkaller-bugs@googlegroups.com, 
	syzbot <syzbot+8983d6d4f7df556be565@syzkaller.appspotmail.com>
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Hi Sven,

On Tue, Mar 19, 2024 at 2:19=E2=80=AFPM Sven Eckelmann <sven@narfation.org>=
 wrote:
>
> On Tuesday, 19 March 2024 11:33:17 CET syzbot wrote:
> > syzbot has found a reproducer for the following issue on:
> >
< ... >
>
> Sorry, this is a little bit off-topic. But how does sysbot figure out the
> subsystems (like "[batman?]"). Because neither the reproducer nor the
> backtrace nor the console output mention anything batman-adv related.

Syzbot looks at several crash reports to determine the bug subsystems
and in this case one of those crashes was pointing to
net/batman-adv/multicast.c:

https://syzkaller.appspot.com/text?tag=3DCrashReport&x=3D15afccb3280000

--=20
Aleksandr

>
> Kind regards,
>         Sven
>
> --