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Sat, 03 Oct 2026 10:05:19 -0700 (PDT) Date: Sat, 3 Oct 2026 22:05:11 +0500 From: Ameer Hamza To: "David Hildenbrand (Arm)" Cc: ljs@kernel.org, rppt@kernel.org, peterz@infradead.org, akpm@linux-foundation.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, linux-mm@kvack.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, stable@vger.kernel.org, 4ncienth@gmail.com, sashal@kernel.org, alexander.motin@truenas.com, caleb.stjohn@truenas.com Subject: Re: [REGRESSION] secretmem: SIGBUS on memfd_secret() pages while perf record runs Message-ID: References: <20261002175651.811343-1-ameer.hamza@truenas.com> <3c5b9d1e-5ed4-4bd1-b532-39f2d4612965@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3c5b9d1e-5ed4-4bd1-b532-39f2d4612965@kernel.org> X-Stat-Signature: 86hbk97kabkymy6ko54d4au19yw1yxzh X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 8199040003 X-HE-Tag: 1791047121-614476 X-HE-Meta: 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 cu5jKAGe wgPuslQUMzN05w3+/JXdBRukhNbgLWSoiW2GglwdOxmofgadfjipWb3whlAwTRFD7O4otg2b6JeGqrKJB0EXRb6/6ZqrKLUVE9nmtoVxe9AaRVuR8xr5CL7fmNS2UX0BFGLsDdelIkRw9jOBJ0ZJOFLo4cS8e055slc6jfgFaJZBJH45tqvvmb98Xy88K/ng5VMlWoF9iQh6jSTcjbHZCjumpyeaF+Z2hDTp0rJ4P6A6iJWtDa4ltZIzcIuYZ1Htyw9ZwGa+p74W9cY+mvR6o1Rv7sSIK9DEWa4WmT//YFu6pgqwWsDQCJ5Nkf7d+gaqEVK+zpRrcsMElj1AN0PeZwJ0p+3KqPUmNfy3zMrG3CUVhga8C8ROgbptbusIS1nzwNXvk66xgp+8yhHTMWDKqmfjudnI8fidylVO+neRTIKoDBXvq2QTUnz5/5QFnskzIIh03 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, Oct 03, 2026 at 04:14:49PM +0200, David Hildenbrand (Arm) wrote: > May I know whether this problem was found by > > (a) A real workload > > (b) A test case > > (c) Complains by some tooling (a). A root userspace process that keeps secrets in memfd_secret() failed while perf record ran on the same machine. I reduced it to the snippet in the report. Thanks, Ameer Hamza