From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 27713C4320A for ; Thu, 12 Aug 2021 14:58:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09CFB6108C for ; Thu, 12 Aug 2021 14:58:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238225AbhHLO6w (ORCPT ); Thu, 12 Aug 2021 10:58:52 -0400 Received: from mout.kundenserver.de ([212.227.126.133]:58857 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238209AbhHLO6t (ORCPT ); Thu, 12 Aug 2021 10:58:49 -0400 Received: from weisslap.aisec.fraunhofer.de ([178.27.102.95]) by mrelayeu.kundenserver.de (mreue009 [212.227.15.167]) with ESMTPSA (Nemesis) id 1M1pk0-1mGP571gUa-002HB7; Thu, 12 Aug 2021 16:58:17 +0200 From: =?UTF-8?q?Michael=20Wei=C3=9F?= To: michael.weiss@aisec.fraunhofer.de Cc: Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Song Liu , Paul Moore , Eric Paris , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, linux-audit@redhat.com Subject: [PATCH 2/3] dm integrity: log audit events for dm-integrity target Date: Thu, 12 Aug 2021 16:57:43 +0200 Message-Id: <20210812145748.4460-3-michael.weiss@aisec.fraunhofer.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210812145748.4460-1-michael.weiss@aisec.fraunhofer.de> References: <20210812145748.4460-1-michael.weiss@aisec.fraunhofer.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:rOLBkevwnsuHTTeZxM6wyt3brTUugDPPIMca4NeT5aNr5Kik2K3 hbgMjJU3VBouB/E3nUPL+YruThvT5ydbySJdhQQjp8WZ+i8fV4e7zNcqUaHlGg+3mWghOU6 K6p+C/8Q3QwxaneRe71C77r9c3+iVHn6DpNPthcNFIqMrXD2v78B6HcfF7hF20FXqZFmQ/r XqHpyX2+hQc8xP0Czd8+A== X-UI-Out-Filterresults: notjunk:1;V03:K0:9iymdaMASiE=:IqAZLDakQwY8KYD1WVLKr6 eMEkKavfwisAuuGYlxUrnYIeV/athXgT6btHoE8H0t7nB/FqltKrAESfO3muhoduz0tXy75wc 11HmxSlbY5J38iQvaLosjbYYrdshRKB8gGqU92CQV7pnZyVWywqwL28kIdo6FKmlqblGAGa/l uhgglf9rOSsQA4Qj3dvUbBzNLcKZ/kQ1XSqKSPiZ6Dmoa8isMjMKEKfdbZeNMqUAKYI9R13SA FfxoimEewhlqjZvkUYstnjAzfu2WjBERdGGHuwU2cD0746Z2OKtkmWBEZdflLz9XYXajgDoLK VcJIPMdwxd23oiBw0PisFUZ2TyLx4NVFShRtaSYrbQFN4MR0QWug6HrD110fjLJBtFKj3tF32 I+Z3B3Aw5Mit7VVyXVX1LscPdMKa6wKMpsNt7pfg/L9UJemiLpNoeQ5syi/r+VrsHnVe+MCHR iOP0scM8ewXtB/uG+HFyg7xxRBqho0M2TdDXAgpEfffBk89bHkpfsja7+2hCAIsGgJAXi2voq LbHKQ3YvEop7qNxrtudHXymQol092aKcQ3neNwwnLDCWGLKSHkcpSWeTRAEa9aatC3bNHG5zw u2tcWKF0Ck9EBGNq3qDJ8fRB9nB9HrL2K90RwcSyc6g8EPN5RTLZU4yh3sAoA9ZyGedk1PA73 pC8Ho2Ml59oHogl87ATtQ3UdA6uV6Qr0hezffJ2XLsFrbsHO6D8InCJUM9fJcsCzgPtEp2NRO ocpS/vLJV9dJ1kouM2STssnQ/csYKV6RMIBTEdPLBXW/9JsBS3CivVcwLDW4Xo7W/sydsbh36 WH6JXPwSlPClySI5bAI5eybtamL94EqeoFaw5BCEY6wjxKCxaBEuiRR/4laj7QxzYgRq40hEc V/v3z/ub4ddREG4PVseA== Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org dm-integrity signals integrity violations by returning I/O errors to user space. To identify integrity violations by a controlling instance, the kernel audit subsystem can be used to emit audit events to user space. We use the new dm-audit submodule allowing to emit audit events on relevant I/O errors. The construction and destruction of integrity device mappings are also relevant for auditing a system. Thus, those events are also logged as audit events. Signed-off-by: Michael Weiß --- drivers/md/dm-integrity.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index 20f2510db1f6..fbbb4c3f16cb 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -23,6 +23,8 @@ #include #include +#include "dm-audit.h" + #define DM_MSG_PREFIX "integrity" #define DEFAULT_INTERLEAVE_SECTORS 32768 @@ -539,6 +541,7 @@ static int sb_mac(struct dm_integrity_c *ic, bool wr) } if (memcmp((__u8 *)ic->sb + (1 << SECTOR_SHIFT) - size, result, size)) { dm_integrity_io_error(ic, "superblock mac", -EILSEQ); + dm_audit_log_target(DM_MSG_PREFIX, "mac-superblock", ic->ti, 0); return -EILSEQ; } } @@ -876,8 +879,10 @@ static void rw_section_mac(struct dm_integrity_c *ic, unsigned section, bool wr) if (likely(wr)) memcpy(&js->mac, result + (j * JOURNAL_MAC_PER_SECTOR), JOURNAL_MAC_PER_SECTOR); else { - if (memcmp(&js->mac, result + (j * JOURNAL_MAC_PER_SECTOR), JOURNAL_MAC_PER_SECTOR)) + if (memcmp(&js->mac, result + (j * JOURNAL_MAC_PER_SECTOR), JOURNAL_MAC_PER_SECTOR)) { dm_integrity_io_error(ic, "journal mac", -EILSEQ); + dm_audit_log_target(DM_MSG_PREFIX, "mac-journal", ic->ti, 0); + } } } } @@ -1782,10 +1787,15 @@ static void integrity_metadata(struct work_struct *w) if (unlikely(r)) { if (r > 0) { char b[BDEVNAME_SIZE]; - DMERR_LIMIT("%s: Checksum failed at sector 0x%llx", bio_devname(bio, b), - (sector - ((r + ic->tag_size - 1) / ic->tag_size))); + sector_t s; + + s = sector - ((r + ic->tag_size - 1) / ic->tag_size); + DMERR_LIMIT("%s: Checksum failed at sector 0x%llx", + bio_devname(bio, b), s); r = -EILSEQ; atomic64_inc(&ic->number_of_mismatches); + dm_audit_log_bio(DM_MSG_PREFIX, "integrity-checksum", + bio, s, 0); } if (likely(checksums != checksums_onstack)) kfree(checksums); @@ -1991,6 +2001,8 @@ static bool __journal_read_write(struct dm_integrity_io *dio, struct bio *bio, if (unlikely(memcmp(checksums_onstack, journal_entry_tag(ic, je), ic->tag_size))) { DMERR_LIMIT("Checksum failed when reading from journal, at sector 0x%llx", logical_sector); + dm_audit_log_bio(DM_MSG_PREFIX, "journal-checksum", + bio, logical_sector, 0); } } #endif @@ -2534,8 +2546,10 @@ static void do_journal_write(struct dm_integrity_c *ic, unsigned write_start, integrity_sector_checksum(ic, sec + ((l - j) << ic->sb->log2_sectors_per_block), (char *)access_journal_data(ic, i, l), test_tag); - if (unlikely(memcmp(test_tag, journal_entry_tag(ic, je2), ic->tag_size))) + if (unlikely(memcmp(test_tag, journal_entry_tag(ic, je2), ic->tag_size))) { dm_integrity_io_error(ic, "tag mismatch when replaying journal", -EILSEQ); + dm_audit_log_target(DM_MSG_PREFIX, "integrity-replay-journal", ic->ti, 0); + } } journal_entry_set_unused(je2); @@ -4490,9 +4504,11 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv) if (ic->discard) ti->num_discard_bios = 1; + dm_audit_log_target(DM_MSG_PREFIX, "ctr", ti, 1); return 0; bad: + dm_audit_log_target(DM_MSG_PREFIX, "ctr", ti, 0); dm_integrity_dtr(ti); return r; } @@ -4566,6 +4582,7 @@ static void dm_integrity_dtr(struct dm_target *ti) free_alg(&ic->journal_mac_alg); kfree(ic); + dm_audit_log_target(DM_MSG_PREFIX, "dtr", ti, 1); } static struct target_type integrity_target = { -- 2.20.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05931C432BE for ; Thu, 12 Aug 2021 15:16:36 +0000 (UTC) Received: from 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Fri, 13 Aug 2021 02:36:56 -0400 Cc: Paul Moore , Mike Snitzer , linux-kernel@vger.kernel.org, Eric Paris , linux-raid@vger.kernel.org, Song Liu , dm-devel@redhat.com, linux-audit@redhat.com, Alasdair Kergon Subject: [dm-devel] [PATCH 2/3] dm integrity: log audit events for dm-integrity target X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 ZG0taW50ZWdyaXR5IHNpZ25hbHMgaW50ZWdyaXR5IHZpb2xhdGlvbnMgYnkgcmV0dXJuaW5nIEkv 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