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Tue, 19 Mar 2024 06:31:47 -0700 (PDT) MIME-Version: 1.0 References: <000000000000901b1c0614010091@google.com> <2615678.iZASKD2KPV@ripper> In-Reply-To: <2615678.iZASKD2KPV@ripper> From: Aleksandr Nogikh Date: Tue, 19 Mar 2024 14:31:35 +0100 Message-ID: Subject: Re: [syzbot] [batman?] [bpf?] possible deadlock in lock_timer_base To: Sven Eckelmann 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 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 2D6EF160013 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: 7rwq8mnkpgz574uyhqumq4c63jtnip7j X-HE-Tag: 1710855108-915435 X-HE-Meta: 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 iaGTYGTR 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.005989, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Sven, On Tue, Mar 19, 2024 at 2:19=E2=80=AFPM Sven Eckelmann = 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 > > --