linux-kernel - Re: [syzbot] [batman?] [bpf?] possible deadlock in lock_timer

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Date: Tue, 19 Mar 2024 14:19:20 +0100
From: Sven Eckelmann <sven@...fation.org>
To: akpm@...ux-foundation.org, andrii@...nel.org, ast@...nel.org,
 b.a.t.m.a.n@...ts.open-mesh.org, bpf@...r.kernel.org, christian@...uner.io,
 daniel@...earbox.net, dvyukov@...gle.com, edumazet@...gle.com,
 elver@...gle.com, glider@...gle.com, hdanton@...a.com, jakub@...udflare.com,
 jannh@...gle.com, john.fastabend@...il.com, kasan-dev@...glegroups.com,
 kuba@...nel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
 mareklindner@...mailbox.ch, mark.rutland@....com, netdev@...r.kernel.org,
 pabeni@...hat.com, shakeelb@...gle.com, syzkaller-bugs@...glegroups.com,
 syzbot <syzbot+8983d6d4f7df556be565@...kaller.appspotmail.com>
Subject: Re: [syzbot] [batman?] [bpf?] possible deadlock in lock_timer_base

On Tuesday, 19 March 2024 11:33:17 CET syzbot wrote:
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    35c3e2791756 Revert "net: Re-use and set mono_delivery_tim..
> git tree:       net
> console output: https://syzkaller.appspot.com/x/log.txt?x=10569181180000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6fb1be60a193d440
> dashboard link: https://syzkaller.appspot.com/bug?extid=8983d6d4f7df556be565
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13d9fa4e180000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=137afac9180000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/26b55a26fc12/disk-35c3e279.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/6f39fa55c828/vmlinux-35c3e279.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/e1e0501539e6/bzImage-35c3e279.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+8983d6d4f7df556be565@...kaller.appspotmail.com

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.

Kind regards,
	Sven
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