From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x226JgW5/kRfRtSw1q8iGC2qDejSq6oPZQW90cz9uwiBjYXEo9FCye1qhk33I5g6O2YQS03Ae ARC-Seal: i=1; a=rsa-sha256; t=1518319211; cv=none; d=google.com; s=arc-20160816; b=AUa9KvgjBWEdooyz3FjEwH9FVcPXQPZvTa+H8RtoJSRRIeinrQUhT36Y4Peq1goTMr BlM9U66SaW3JvRTFH/O5w1jkOIJY5wz2voxeVoXAIE+gQefXHyonAS4kZ23gBU7BvtC8 w7+cVX7MPtQY9Q+Ee6JuqUkbsh6xqIqAIjHTws+BMnm4X/BglLL1FjUv7yp7e2bb1ZI7 Em2e/xBIgNAPguFXjKD9tgJ8BMhBLzbaIbAJahsKMUzIaw1St9Ytv2ZNoJD5Oo135V6O 4h3k6G6/HNGQO3COSj+FEPjbcr8wXxI5ZXb1Qnlm42z23IT/kHEYAN+YvEJFjwJOw8Mb MjFA== 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=7zMj44DR+KVPrh4isZiUKaD/8f3BK/d2CKcmY2YwjNU=; b=Oxw0akVuE5cSqAz1OmpwcW+1uMjPBIXQicCYUVaQWrcQjG/cTYuLRizi4e4m2ev5zt Da4L2yCOUUMKJ7AOx75Pkj1RMQCTRALq3tD8zyv10cpGkPoQW+/S7OmetcAwoByL9y13 Ztmlu7zvZMUyJ11Pqo7j/aY+AKVmNwuQ5LOhW3eyWGO6mcw27tzmpgXcJii9fVoybJC4 2+9O4sJzeCfw2JqbCM7wA7TrENVX2Tcvko1DKulzuNS9TqV4mwfdASh/b5txrk6uE0FQ vLM/w+ketIowjzkMj8v3ffDjou4mKEG+QjZ/kwLl0E6pKmvui/bC1JfeyqOxlaGNKtdD Bo3A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of kernel-hardening-return-11696-gregkh=linuxfoundation.org@lists.openwall.com designates 195.42.179.200 as permitted sender) smtp.mailfrom=kernel-hardening-return-11696-gregkh=linuxfoundation.org@lists.openwall.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of kernel-hardening-return-11696-gregkh=linuxfoundation.org@lists.openwall.com designates 195.42.179.200 as permitted sender) smtp.mailfrom=kernel-hardening-return-11696-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 v15 0/6] mm: security: ro protection for dynamic data Date: Sun, 11 Feb 2018 05:19:14 +0200 Message-ID: <20180211031920.3424-1-igor.stoppa@huawei.com> X-Mailer: git-send-email 2.14.1 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?1592073085229547021?= X-GMAIL-MSGID: =?utf-8?q?1592073085229547021?= 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 v14: [http://www.openwall.com/lists/kernel-hardening/2018/02/04/2] - fix various warnings from sparse - multiline comments - fix naming of headers guards - fix compilation of individual patches, for bisect - split genalloc documentation about bitmap for allocation - fix headers to match kerneldoc format for "Return:" field - fix variable naming according to coding guidelines - fix wrong default value for pmalloc Kconfig option - refreshed integration of pmalloc with hardened usercopy - removed unnecessary include that was causing compilation failures - changed license of pmalloc documentation from GPL 2.0 to CC-BY-SA-4.0 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/index.rst | 1 + Documentation/core-api/pmalloc.rst | 114 ++++++++ include/linux/genalloc-selftest.h | 26 ++ include/linux/genalloc.h | 7 +- include/linux/mm_types.h | 1 + include/linux/pmalloc.h | 222 +++++++++++++++ include/linux/vmalloc.h | 1 + init/main.c | 2 + lib/Kconfig | 15 + lib/Makefile | 1 + lib/genalloc-selftest.c | 400 ++++++++++++++++++++++++++ lib/genalloc.c | 554 +++++++++++++++++++++++++++---------- mm/Kconfig | 15 + mm/Makefile | 2 + mm/pmalloc-selftest.c | 63 +++++ mm/pmalloc-selftest.h | 24 ++ mm/pmalloc.c | 499 +++++++++++++++++++++++++++++++++ mm/usercopy.c | 33 +++ mm/vmalloc.c | 18 +- 19 files changed, 1852 insertions(+), 146 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 -- 2.14.1