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Sun, 16 Jun 2024 07:05:03 -0700 (PDT) Date: Sun, 16 Jun 2024 07:05:03 -0700 In-Reply-To: <00000000000041df050616f6ba4e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d05580061b025528@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in __mmap_lock_do_trace_start_locking From: syzbot To: akpm@linux-foundation.org, cgroups@vger.kernel.org, hannes@cmpxchg.org, hawk@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, lizefan.x@bytedance.com, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, netdev@vger.kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: khyw85bpt7s8outhj44apgifuny384ne X-Rspamd-Queue-Id: BF454A000D X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1718546704-950830 X-HE-Meta: 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 +iGfxO50 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 xP+P8e4c 9Sy2zVoCCJ5Kk5pr7lnrHqjv4IBscVF4utg+wYtjrx6R6eUeP1kQwlDHh5/PwPTMZslIlqc6khEzIf33OJSOt8v60+IpWA0UBmADkxP5LzHPGAI5VsjiIxNBDEisQmF5FU4UiD2ZU4Q= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: syzbot has bisected this issue to: commit 21c38a3bd4ee3fb7337d013a638302fb5e5f9dc2 Author: Jesper Dangaard Brouer Date: Wed May 1 14:04:11 2024 +0000 cgroup/rstat: add cgroup_rstat_cpu_lock helpers and tracepoints bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16695261980000 start commit: 36534d3c5453 tcp: use signed arithmetic in tcp_rtx_probe0_.. git tree: bpf final oops: https://syzkaller.appspot.com/x/report.txt?x=15695261980000 console output: https://syzkaller.appspot.com/x/log.txt?x=11695261980000 kernel config: https://syzkaller.appspot.com/x/.config?x=333ebe38d43c42e2 dashboard link: https://syzkaller.appspot.com/bug?extid=6ff90931779bcdfc840c syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1585acfa980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17bdb7ee980000 Reported-by: syzbot+6ff90931779bcdfc840c@syzkaller.appspotmail.com Fixes: 21c38a3bd4ee ("cgroup/rstat: add cgroup_rstat_cpu_lock helpers and tracepoints") For information about bisection process see: https://goo.gl/tpsmEJ#bisection