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Sun, 18 Aug 2024 21:40:01 -0700 (PDT) Date: Sun, 18 Aug 2024 21:40:01 -0700 In-Reply-To: <0000000000002be09b061c483ea1@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f1e97e062001e6b2@google.com> Subject: Re: [syzbot] [mm?] possible deadlock in __mmap_lock_do_trace_released From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, bpf@vger.kernel.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, nsaenz@amazon.com, nsaenzju@redhat.com, penguin-kernel@I-love.SAKURA.ne.jp, penguin-kernel@i-love.sakura.ne.jp, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: tzfaebmf45knz3resgm396qmphqsxcdy X-Rspamd-Queue-Id: 07ADA180012 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1724042402-37573 X-HE-Meta: U2FsdGVkX191Hj+isZOAlvu4js3QkLo1Z220cz7HswZqsPo+Jq2sIT1MOR2WkqeSPiUsFtAtwz9jTPgNjdWUWlvt+3cGalLfSFoKJbZgntmEEWhwOjyps2NsTrS8Q8S5NwenkjnsuIuH7W+kkMMmR0EYwAsI+qa80/YMxZoxqiobXRu/eiLse4SY7DIZbum0GVx7vDgwv1bk84zuhW5bVcUEp73ImxXQeaqonxhpfU0TY+jvXZS/HGXa/ZsON/15D521BWNGvW3EDRVm2EyZg5uUhwBF/TDkgemmUmW27I65S2PGmvgb2eq42y2HmRaIGs+WdaZt2DBaqKjt7+1x7xXgUeS0UVeJqR1jbKfnD6YHaeBBoBGClBL05vxD2R3e8bGLUTdFmUAdLMFOtkKjGcMcZkV594Zt/s6rfMXR1lsj3VMT62tvEW1zZblFipOOqna4i2yOZTGpa+HW+LSP+5eqIAAA8ye6KiU37BrFd2AtbZWFcjLnaMzipNTQBfFYPvZJxgonPpdQdCFzHI3Z3LxCNNdKXHbdBYlKYCVVlPtIBJrovz6uGLkTjQoEJ865GDEWB1k9zjurrbcSCDBpW7ZtiHM9PTdTEXTeL3RbSdjFmGecxEooq7qExUehdqX2/9pzK2BfsZGvZc2jwA6AAMT2R8Db3GNJjl9EGuLWmYghlpCyqikIKc6F9dxhePphzhovhbQje/DD/L/xqpEpLaUGOWoudXrUE0InXSwfvvYV0xfBJGfV7Cfj6YrfPsgEiJQfIYfmejnqTN3/IfcKpYnL0bwO1SNILI/ASNdFKdc9ynVATJk1kyOTuwJA1eI00XWINmZrlJQxYbfkTV9buzdqZid6HHjJBfw6wLVjP5QClGeduRqR2DVoZCn2bWOdISV6LtJG8HVl/PQlbY5D69oUTQZVI5kRZr6BmAgbwZezDiDuglhFrIXIHuDZ/pu55f8lvvmnbmyppkwN9WO Ze6LCqJz 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 3w8osGpZ 0UHEkJFA3s0hWq5bykY1BA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.005422, 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 suspects this issue was fixed by commit: commit 7d6be67cfdd4a53cea7147313ca13c531e3a470f Author: Tetsuo Handa Date: Fri Jun 21 01:08:41 2024 +0000 mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12d48893980000 start commit: a12978712d90 selftests/bpf: Move ARRAY_SIZE to bpf_misc.h git tree: bpf-next kernel config: https://syzkaller.appspot.com/x/.config?x=736daf12bd72e034 dashboard link: https://syzkaller.appspot.com/bug?extid=16b6ab88e66b34d09014 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=125718be980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14528876980000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer For information about bisection process see: https://goo.gl/tpsmEJ#bisection