From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C7A117D2; Thu, 19 Jun 2025 18:36:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750358172; cv=none; b=rtnYWjonN6Q0V70xaekZ4DmRr4v3hoAREdVTxgpaNIUFylJfHmRaPUemg5l3bwZ7LAuRj6L3j298q2mOLgdYGY+OEabk8oASHxrsOKVFZXDbdWnu2EeAxzCCwszmAuKi8yqzRPDsCLpqnK5i5qFSBUkdrM+98m/rEM5T4FWCQII= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750358172; c=relaxed/simple; bh=WsaNlTsPKbwW1LA0IoyQALMLAOiw40vo3RwoI/57mP4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=iV8ohHvVjzBSK3devKVnwn9r+4Xi56REARH815EKp23XDxxKu37D074L+nRCDo2LTz5jsPLtQ1LZomIFfLUqRAQR38ai0MeQNjeOReBOB20Jm7r72jjJ6IGC1NbKy9iOq9b/Ypvssn+2/0qB+CwLeBglMY2+QCA2VBSrYGlxf3g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iYUOGLPI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iYUOGLPI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1F6FC4CEED; Thu, 19 Jun 2025 18:36:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750358172; bh=WsaNlTsPKbwW1LA0IoyQALMLAOiw40vo3RwoI/57mP4=; h=From:To:Cc:Subject:Date:From; b=iYUOGLPINT7v2eZ9EfUO7JoqJdLRVd5Wdo/snAnY8of/vlou0/0qj7XZ3THZYByxI UMSah//Kdrq/NMOr5MqIt8PVvvq8wUyJPRta7Iq8h8SRvI+VsyKUsBsClzO6PaBtTH JNlO/lXhR8MxEal64AhpGP7ZHVCs/3yXYBM81jjWtV4zHXxsTiCEihuUloroTBU6Cy yig6CC0dUcv286ggwZKWGvwOJcgeGmUIe7ijQgYAfVUh4ps5f1Gzf2IR6jmYMmGkMl NoOH1YLlcJzyApt1kmcCQKCxn7+TfA1xygXAsZFXX13HatyPQsSfkyQquROySnDJtL S0Z6HdFk26i8Q== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Shuah Khan , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org, #, 6.3.x Subject: [PATCH 0/2] mm/damon: fix memory leak in memcg_path sysfs file Date: Thu, 19 Jun 2025 11:36:06 -0700 Message-Id: <20250619183608.6647-1-sj@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Users can leak memory by repeatedly writing a string to DAMOS sysfs memcg_path file. Fix it (patch 1) and add a selftest (patch 2) to avoid reoccurrance of the bug. SeongJae Park (2): mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write selftets/damon: add a test for memcg_path leak mm/damon/sysfs-schemes.c | 1 + tools/testing/selftests/damon/Makefile | 1 + .../selftests/damon/sysfs_memcg_path_leak.sh | 43 +++++++++++++++++++ 3 files changed, 45 insertions(+) create mode 100755 tools/testing/selftests/damon/sysfs_memcg_path_leak.sh base-commit: 05b89e828eb4f791f721cbdc65f36e1a8287a9d3 -- 2.39.5