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imf10.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=Xp27y3Qk; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf10.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1793197053; b=LMnNT5qI6ivkNURJeRnYZPHU0egXq+BRRTDKdrMQuvojLFExEPazaqFpP7XVRSlXFH7BdV Pp8pqDfQ1zQctep/pkPhKKos3ZzJsqWGr2YaNRskfVWvQCm6nzSF9clcJ+UTPDM5zbd+eI IoemvxaKovgFPAB6cENDBx4RpkKD40w= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id D0D89601FA; Wed, 28 Oct 2026 14:17:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5999A1F031EE; Wed, 28 Oct 2026 14:17:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793197052; bh=J6f7JSuYXknDVja0lBd4MS98hOKm2HMrf95+I/iqXAI=; h=From:To:Cc:Subject:Date; b=Xp27y3Qk0/PcLRDFNJOilMflz/3QlpWLyj9/vbuUvfYRpFHjWc6PrYiqmDoRdMdKH m+WGfcoGVYmZL4m8HawHgUSPWrrmeMDWWOMWy3X3PcXfNO6QZ4VaxebIZdvByTji0r aeFDjWXZI5BllWJ7C1wBFtdDfhzNWXkxZGdArLp5+etlqxbfBtXxCyXY8sI6Hjt2mG sfFOicrqrd2+N7MjWs7QzSh4U8Iwy9TCBf+U8QuItwC9OA2xc7IEka7Ssr7Zz+qL9d jqYBhr2bnSnkb9N/DAbYOIjbIP7bvFv4Y73r5Z43z8XswxkbMMmSKiqPILclwVhy5s XfJ8aUbb1iACg== From: SJ Park To: stable@vger.kernel.org Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 6.1.y 0/2] mm/damon/sysfs: fix pid leaks from wrong error handlings Date: Wed, 28 Oct 2026 07:17:20 -0700 Message-ID: <20261028141723.161776-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 497DEC000D X-Rspam-User: X-Stat-Signature: qfdmmr473u3zae5jrkoniqddbdjcj5zy X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam03 X-HE-Tag: 1793197053-780344 X-HE-Meta: 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 ts76pl6i svp2BictlnotLc2t3FCFtKHZkw7+cVn2JCiDQEWm55xd1drEDN5bY8HY5V6mVgZMwJ2jRgEEiFydL7RRkGGXWKyD35K81XHr4xW/70M3Wa7KVIfv1RxuRnou3R41zt0/TS+o1rGB1MHJa/E4k3yxlaiMN1hj5EHFOaendkg2OXDuUn9b5ESaxYH6dhUTRwciyFFoH4tmsQs3BfvldN+sOZ7kGjnhzJ3mg3HDw/yOQcgDVk/s= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 DAMON sysfs interface can leak pids due to wrong error handlings. The issue in the mainline has been fixed with code refactoring. The refactoring is done with commits including 7114bc5e01cf ("mm/damon/core: add cleanup_target() ops callback"). Porting all the refactoring changes to old stable kernels will be challenging. Hence submitting this non-mainline hotfix series. Changes from RFC - RFC: https://lore.kernel.org/20261028051104.154232-1-sj@kernel.org - Drop RFC tag. SJ Park (2): mm/damon/sysfs: put target pids for damon_start() failure mm/damon/sysfs: put target pids for apply_inputs() failure mm/damon/sysfs.c | 2 ++ 1 file changed, 2 insertions(+) base-commit: 2d552c13645b4174829d2e131c6f6483a5111b6f -- 2.47.3