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[87.205.15.91]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c46bd4e7c94sm373434066b.27.2026.10.26.18.06.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 26 Oct 2026 18:06:48 -0700 (PDT) Message-ID: <7c8d96bf-368d-4272-8cd1-94740a2e4a84@gmail.com> Date: Tue, 27 Oct 2026 02:06:47 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] kernfs, autofs: fix pipe lock cycles through sysfs stores To: Ian Kent , Greg Kroah-Hartman Cc: Tejun Heo , "Rafael J . Wysocki" , Danilo Krummrich , Alexander Viro , Christian Brauner , Jan Kara , Ingo Molnar , Peter Zijlstra , Andrew Morton , Jens Axboe , driver-core@lists.linux.dev, autofs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, syzbot+002fb7b2d0bc53bf7e75@syzkaller.appspotmail.com References: <6aa23178.f81106d8.2ab401.0006.GAE@google.com> <4f56c93a9fc5fee152364974773df0a319c84af9.camel@themaw.net> Content-Language: en-US From: Krystian Kaniewski In-Reply-To: <4f56c93a9fc5fee152364974773df0a319c84af9.camel@themaw.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit One additional detail I missed in my previous reply. I reproduced the warning on the unmodified kernel at commit: 93f51579e7df248780214094418f205253383cc5 Exact kernel version: 7.3.0-rc4-g93f51579e7df #1 I ran it under QEMU TCG using the configuration supplied by syzbot. Both the unmodified C reproducer and the original syz reproducer reported the same lockdep cycle. Thanks, Krystian