From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x226/gc+H4JlNjEY0q8MuN4FvIiTNNVg1HwtbJtd11Oi/J2PXFAIpmt+uYjPLGzIhAqS7mHXl ARC-Seal: i=1; a=rsa-sha256; t=1517687026; cv=none; d=google.com; s=arc-20160816; b=gxltQ23SOVrVcWsTMo8Kudd70ik4TBW0CVZuClG0/d4c/3lyW2OriYI0FQPt7OQ1mo yUSOOAsUInMW5x78hSpHUTNz57m1p/HhyLCURwVE4d5ZqA7eJEAGbuiMNd69AvXHUVq4 Xh+QiNuBe2wkr5HTXakRPwxvE8tboRAWknN3jSb/tZbqTdVx5tDcZ+qPEpBsI+jP4TTc cDTCDHzq64wU8el5XqwKlLoLE8znA985ZMS//s8y9CxLLwKqW7vYOEGdB0yXSI3wxf/q slWDE6ZjQBfSsZKuUmGG0Qq+qwCp3d06vlDBXTIV4fscPNqLxWphXk5d7X8eoc8F6kkx jdBA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:message-id:date:subject:cc:to:from:delivered-to :list-id:list-subscribe:list-unsubscribe:list-help:list-post :precedence:mailing-list:arc-authentication-results; bh=cCjx1l42K2L82GNJd2t6q59xGwtBsUJg/NZMB2xfkyk=; b=ZKnkMnnK1aCZegOj0X1MqedzYHhFWRhmp596mJYihub/BNzOSPqmqiTfHirzM4yWsW 6swi0FUp4IPMuNmLlhxxpYk3QOFkrgAGju4UXao8D3aw3QQ2D+SHvNQf/AAO9EWOCddk Yp+9OmZEKB7zufGHpFZjo6TArWfW6NKoRjwqNq/m30Dn6Tg2WXpWcKPAtdAiUsMvxz80 JPx8BtzuMgcvVqftEGiW3qakr95B+gSshDiRXto7rH1DhlWMcWV31lM87bBuFPMKkq7d 4upiGlLmhG8ZZ94G/WL3tZQN4Ubm4Rmb+YimZDNW26M12dA/dru46AXPXEKsuhT9uK5P Uqfw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of kernel-hardening-return-11562-gregkh=linuxfoundation.org@lists.openwall.com designates 195.42.179.200 as permitted sender) smtp.mailfrom=kernel-hardening-return-11562-gregkh=linuxfoundation.org@lists.openwall.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of kernel-hardening-return-11562-gregkh=linuxfoundation.org@lists.openwall.com designates 195.42.179.200 as permitted sender) smtp.mailfrom=kernel-hardening-return-11562-gregkh=linuxfoundation.org@lists.openwall.com Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm List-Post: List-Help: List-Unsubscribe: List-Subscribe: From: Igor Stoppa To: , , , , , CC: , , , , , Igor Stoppa Subject: [RFC PATCH v13 0/6] mm: security: ro protection for dynamic data Date: Sat, 3 Feb 2018 21:42:52 +0200 Message-ID: <20180203194258.28454-1-igor.stoppa@huawei.com> X-Mailer: git-send-email 2.9.3 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.122.225.51] X-CFilter-Loop: Reflected X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1591410191388132274?= X-GMAIL-MSGID: =?utf-8?q?1591410191388132274?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This patch-set introduces the possibility of protecting memory that has been allocated dynamically. The memory is managed in pools: when a memory pool is turned into R/O, all the memory that is part of it, will become R/O. A R/O pool can be destroyed, to recover its memory, but it cannot be turned back into R/W mode. This is intentional. This feature is meant for data that doesn't need further modifications after initialization. However the data might need to be released, for example as part of module unloading. To do this, the memory must first be freed, then the pool can be destroyed. An example is provided, in the form of self-testing. Changes since v12 [https://lkml.org/lkml/2018/1/30/397] - fixed Kconfig dependency for pmalloc-test - fixed warning for size_t treated as %ul on i386 - moved to SPDX license reference - rewrote pmalloc docs Igor Stoppa (6): genalloc: track beginning of allocations genalloc: selftest struct page: add field for vm_struct Protectable Memory Pmalloc: self-test Documentation for Pmalloc Documentation/core-api/pmalloc.rst | 114 ++++++++ include/linux/genalloc-selftest.h | 30 +++ include/linux/genalloc.h | 7 +- include/linux/mm_types.h | 1 + include/linux/pmalloc.h | 211 +++++++++++++++ include/linux/vmalloc.h | 1 + init/main.c | 2 + lib/Kconfig | 15 ++ lib/Makefile | 1 + lib/genalloc-selftest.c | 402 +++++++++++++++++++++++++++++ lib/genalloc.c | 444 ++++++++++++++++++++++---------- mm/Kconfig | 9 + mm/Makefile | 2 + mm/pmalloc-selftest.c | 61 +++++ mm/pmalloc-selftest.h | 26 ++ mm/pmalloc.c | 514 +++++++++++++++++++++++++++++++++++++ mm/usercopy.c | 25 +- mm/vmalloc.c | 18 +- 18 files changed, 1742 insertions(+), 141 deletions(-) create mode 100644 Documentation/core-api/pmalloc.rst create mode 100644 include/linux/genalloc-selftest.h create mode 100644 include/linux/pmalloc.h create mode 100644 lib/genalloc-selftest.c create mode 100644 mm/pmalloc-selftest.c create mode 100644 mm/pmalloc-selftest.h create mode 100644 mm/pmalloc.c -- 2.9.3