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b=dH7NmgBycpzyrZSdve1C8Fk8TXpjSh7JeCqZ+8ihWJ/HuR3oxJqwF9Oq1hdERXVWE vyCYzU1ATQKgtRC+7Mmx+PDQ7iclPH8vYwLkg+5EBtCYqof275CGpRJBFmLmFz5IGJ a//2TC6E5ElJ0act+1CRfkrUcatD0l/qcrIRN0KVZOLAFCQy6lYZ6Sl6jyVcpN06G1 Brj3skB1mAqRz7rypA/HIhAdN942xNbqDo6GN5ZrOcGpKshYNBUvWhoRA+L4TYOYLo Jz3Be2L/wOr5lJeVqc3yDyFtzgeDrRndW1x64TQJJNDhXKvDkYFn8TQtdsDQnLaSmw ZU9rGYoJAp7hg== From: Sasha Levin To: ljs@kernel.org, rppt@kernel.org, peterz@infradead.org Cc: Sasha Levin , akpm@linux-foundation.org, david@kernel.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, alexander.motin@truenas.com, caleb.stjohn@truenas.com, ameer.hamza@truenas.com Subject: Re: [REGRESSION] secretmem: SIGBUS on memfd_secret() pages while perf record runs Date: Sun, 4 Oct 2026 12:29:39 -0400 Message-ID: <2026-10-04-1-daily-reply-0001-secretmem-requeue@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261002175651.811343-1-ameer.hamza@truenas.com> References: <20261002175651.811343-1-ameer.hamza@truenas.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: A85B2160009 X-Stat-Signature: 8zexdiwpkbdgu8kbbs1goz8h3bnm19b9 X-HE-Tag: 1791131402-240752 X-HE-Meta: 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 WHR0q0wE 3I6Hhh5LBNx6dWF1gFvfhtaQVl8xhSzWQlLdE3Iac4kVssqyHNtkPEMTsGH5rmhhhXRw9RvZ/KFQK0iynXhaW4dGLssDap3rs1YCpcoXyJBPDKGjIQmka9FJ3NFAGt3pvQeiWwxDtCVo5qNTb/1sDTpCINmGsHSvT1XE06nWSnZhr/IbF8eaiA2sioN1J9G5WZzVIJP91pA1a55NUubA7U/+VuSmAxVTvRPHXkmnI9niRdzVnvUCWzKAP5nBbnEu5TPww58hsKHhQjKHBge4ZVkaPmKWlPmU+wJVbG5pwWl9J2SoZYOu5rsToUw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > Since commit 97d34aa65c29 ("mm/secretmem: properly account locked > pages"), in v7.3-rc2 and the 6.18.52 and 7.2.5 backports, touching a > memfd_secret() page for the first time fails with SIGBUS while the > same user is running perf record, and read() into such a page fails > with EFAULT. Re-queued the secretmem accounting fix for 6.12, 6.6 and 6.1, per Lorenzo. The perf fix will be needed on these trees once it lands. -- Thanks, Sasha