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[2620:137:e000::3:7]) by mx.google.com with ESMTPS id a14-20020a170902ecce00b001c6183af4d3si1640889plh.332.2023.10.31.14.11.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Oct 2023 14:11:29 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=UW6PIVAC; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id B991E810670D; Tue, 31 Oct 2023 14:11:28 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344724AbjJaVLU (ORCPT + 33 others); Tue, 31 Oct 2023 17:11:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46654 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344711AbjJaVLT (ORCPT ); Tue, 31 Oct 2023 17:11:19 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EF7AE4; Tue, 31 Oct 2023 14:11:16 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 1FB9A1F74C; Tue, 31 Oct 2023 21:11:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1698786675; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=733zuLlM37zhgegj/Aa3vANdwzR7I3IGxmEe2YYzTF0=; b=UW6PIVACAQKyS0Zxdm8Qpoh1UOm7wJRcxItQlfxLDclA+UDNegWTLOVmt+9Ryuc4eZOMe0 cgwplNiFOYltHDyv4KEU3FLIZf6mw/0r3Q0Y7WjCHgJP0Tn11IFmPNrf9EVFXqt1KdPrkf 3ZPoUVHu9KLa4hrWDHk7Wf7pHDNO524= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 881C7138EF; Tue, 31 Oct 2023 21:11:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id q5mjEnJtQWXWWgAAMHmgww (envelope-from ); Tue, 31 Oct 2023 21:11:14 +0000 From: Marcos Paulo de Souza Date: Tue, 31 Oct 2023 18:10:51 -0300 Subject: [PATCH v3 1/3] kselftests: lib.mk: Add TEST_GEN_MODS_DIR variable MIME-Version: 1.0 Message-Id: <20231031-send-lp-kselftests-v3-1-2b1655c2605f@suse.com> References: <20231031-send-lp-kselftests-v3-0-2b1655c2605f@suse.com> In-Reply-To: <20231031-send-lp-kselftests-v3-0-2b1655c2605f@suse.com> To: Shuah Khan , Jonathan Corbet , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , Joe Lawrence Cc: linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, live-patching@vger.kernel.org, Marcos Paulo de Souza X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1698786668; l=4750; i=mpdesouza@suse.com; s=20231031; h=from:subject:message-id; bh=Jag/lvrJcOjzASumYTCyZXP1V0dWxSS+ekxFXqM8RXg=; b=PHtutqsT9XFnYWbUJFgej+pZBli8wFjCKc5z9NUmLgJGDtn4i+SlpCgOlvQY2043RcvxewB5H/Ed Fv53R5mOB3g7GSJPAaIOzPQiJUw3BH2nahgtYp5uS+YgxrUgcH0i X-Developer-Key: i=mpdesouza@suse.com; a=ed25519; pk=/Ni/TsKkr69EOmdZXkp1Q/BlzDonbOBRsfPa18ySIwU= X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Tue, 31 Oct 2023 14:11:28 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781306951898622740 X-GMAIL-MSGID: 1781306951898622740 Add TEST_GEN_MODS_DIR variable for kselftests. It can point to a directory containing kernel modules that will be used by selftest scripts. The modules are built as external modules for the running kernel. As a result they are always binary compatible and the same tests can be used for older or newer kernels. The build requires "kernel-devel" package to be installed. For example, in the upstream sources, the rpm devel package is produced by "make rpm-pkg" The modules can be built independently by make -C tools/testing/selftests/livepatch/ or they will be automatically built before running the tests via make -C tools/testing/selftests/livepatch/ run_tests Note that they are _not_ built when running the standalone tests by calling, for example, ./test-state.sh. Signed-off-by: Marcos Paulo de Souza --- Documentation/dev-tools/kselftest.rst | 4 ++++ tools/testing/selftests/lib.mk | 20 +++++++++++++++----- 2 files changed, 19 insertions(+), 5 deletions(-) diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst index deede972f254..736c671c47b6 100644 --- a/Documentation/dev-tools/kselftest.rst +++ b/Documentation/dev-tools/kselftest.rst @@ -245,6 +245,10 @@ Contributing new tests (details) TEST_PROGS, TEST_GEN_PROGS mean it is the executable tested by default. + TEST_GEN_MODS_DIR should be used by tests that require modules to be built + before the test starts. The variable will contain the name of the directory + containing the modules. + TEST_CUSTOM_PROGS should be used by tests that require custom build rules and prevent common build rule use. diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index 118e0964bda9..6c7c5a0112cf 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -70,12 +70,15 @@ KHDR_INCLUDES := -isystem $(KHDR_DIR) # TEST_PROGS are for test shell scripts. # TEST_CUSTOM_PROGS and TEST_PROGS will be run by common run_tests # and install targets. Common clean doesn't touch them. +# TEST_GEN_MODS_DIR is used to specify a directory with modules to be built +# before the test executes. These modules are cleaned on the clean target as well. TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS)) TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED)) TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES)) +TEST_GEN_MODS_DIR := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_MODS_DIR)) all: kernel_header_files $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) \ - $(TEST_GEN_FILES) + $(TEST_GEN_FILES) $(if $(TEST_GEN_MODS_DIR),gen_mods_dir) kernel_header_files: @ls $(KHDR_DIR)/linux/*.h >/dev/null 2>/dev/null; \ @@ -105,8 +108,8 @@ endef run_tests: all ifdef building_out_of_srctree - @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then \ - rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \ + @if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)$(TEST_GEN_MODS_DIR)" != "X" ]; then \ + rsync -aq --copy-unsafe-links $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(TEST_GEN_MODS_DIR) $(OUTPUT); \ fi @if [ "X$(TEST_PROGS)" != "X" ]; then \ $(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) \ @@ -118,6 +121,12 @@ else @$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS)) endif +gen_mods_dir: + $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) + +clean_mods_dir: + $(Q)$(MAKE) -C $(TEST_GEN_MODS_DIR) clean + define INSTALL_SINGLE_RULE $(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH)) $(if $(INSTALL_LIST),rsync -a --copy-unsafe-links $(INSTALL_LIST) $(INSTALL_PATH)/) @@ -131,6 +140,7 @@ define INSTALL_RULE $(eval INSTALL_LIST = $(TEST_CUSTOM_PROGS)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_PROGS_EXTENDED)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(TEST_GEN_FILES)) $(INSTALL_SINGLE_RULE) + $(eval INSTALL_LIST = $(TEST_GEN_MODS_DIR)) $(INSTALL_SINGLE_RULE) $(eval INSTALL_LIST = $(wildcard config settings)) $(INSTALL_SINGLE_RULE) endef @@ -156,7 +166,7 @@ define CLEAN $(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN) endef -clean: +clean: $(if $(TEST_GEN_MODS_DIR),clean_mods_dir) $(CLEAN) # Enables to extend CFLAGS and LDFLAGS from command line, e.g. @@ -187,4 +197,4 @@ $(OUTPUT)/%:%.S $(LINK.S) $^ $(LDLIBS) -o $@ endif -.PHONY: run_tests all clean install emit_tests +.PHONY: run_tests all clean install emit_tests gen_mods_dir clean_mods_dir From patchwork Tue Oct 31 21:10:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcos Paulo de Souza X-Patchwork-Id: 160346 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:abcd:0:b0:403:3b70:6f57 with SMTP id f13csp24853vqx; Tue, 31 Oct 2023 14:11:33 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHOXrxPQKr6gKkdg8hVqrP3j76f1ykCJtlPCyJIfAGjjrkiQElthWmlMbtrmnbGM/qHKVsh X-Received: by 2002:a05:6a20:2447:b0:14d:e075:fc5d with SMTP id t7-20020a056a20244700b0014de075fc5dmr12255721pzc.40.1698786693301; Tue, 31 Oct 2023 14:11:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1698786693; cv=none; d=google.com; s=arc-20160816; b=ddQgLwFlg0oja8mmuyH4peXVcbA5Vi0B6eH9s+oQMGUjUu1Qe8+XA0JOXfZjDX2UWl zmW1oeUVbyRYdVlIZ7+3ZfUgvhMjVgjXdBaYMnRl9tbJBGvNs0Q+ZMwTyENS/EgJjGkh zbmW1jMXFhYjBjjCS68DWZvW7D+UjOwikhbecEoU/Ao/dE2WXbtHzXuBdDmc1W2wdKaH dmyi0IhL7P+Bqv+HHesrZRk6aXu/TtTT6Jh+JLwfYPkQfVtBHCC9f3WY5cQ0JwxS+eXL i3cro9q8Ys5LivXg0mkLS7qjDN3Ft7URePx87GE1q0OXMt/uxFU1E3xPi17WcD5HKujd U/Hg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=Y7hIOLxBC1CyyRiqwrQkYL1cVeXudPmCOYTWqq9y96c=; fh=Mq58102248fM07I0WalrZ/nXtmtKWhasuGO5B/rfF9E=; b=oIWyyCWNxO75evXffL/33OgvRUGFSOyUXiPhHb//GjJ5xmXO+C0bxeCMExQz5hDbCU 6YY2wQiX2GZSj+2wFs/+/ok16CdiEkXrdY7wU9l9rK0q+XlH5A0FoPkkj5I6QgIYtyby iAELXb3MrcrK0V2GiN5X+VEpZ6IlC9mz5P88SSld7r5MzlkT4vDEuo6uUjaL6a73gl2x qSWU2qguJTjMJM2gBHTIdkkB2VepYZfYdKTkP+fq6oNJkAi8Uu8sFBa+fWK+5gfSn08s Tupc4bdbi0Tp7sQ3wXvqSjBVGTmy/ud6wayPyzxwFJHSBRxf23n9OoCK8r/gtMiUpw1C dLPA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=qc+ocAHv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: from snail.vger.email (snail.vger.email. [23.128.96.37]) by mx.google.com with ESMTPS id z14-20020a170903018e00b001cc55215729si1568957plg.363.2023.10.31.14.11.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Oct 2023 14:11:33 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=qc+ocAHv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id 50A658106716; Tue, 31 Oct 2023 14:11:32 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344816AbjJaVL3 (ORCPT + 33 others); Tue, 31 Oct 2023 17:11:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344815AbjJaVL0 (ORCPT ); Tue, 31 Oct 2023 17:11:26 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82B1FE4; Tue, 31 Oct 2023 14:11:20 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 3C2F71F38C; Tue, 31 Oct 2023 21:11:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1698786679; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Y7hIOLxBC1CyyRiqwrQkYL1cVeXudPmCOYTWqq9y96c=; b=qc+ocAHvSwupJNRW1MqbMEMwc/JmxlWzgJG2wnE/D4/JiVj9qhlhikayWqTx7CseGQteQG iUaSGeTb6ZIcNWD+dWusZRKvks06vboPww007iFdVHS1QirC7tnJDszJFiijSpUy4hUZHW a6LyzeEsfCrBUwtJ6lWYWvM3bzkp/to= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 6365E138EF; Tue, 31 Oct 2023 21:11:18 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id pv4cCXZtQWXhWgAAMHmgww (envelope-from ); Tue, 31 Oct 2023 21:11:18 +0000 From: Marcos Paulo de Souza Date: Tue, 31 Oct 2023 18:10:52 -0300 Subject: [PATCH v3 2/3] livepatch: Move tests from lib/livepatch to selftests/livepatch MIME-Version: 1.0 Message-Id: <20231031-send-lp-kselftests-v3-2-2b1655c2605f@suse.com> References: <20231031-send-lp-kselftests-v3-0-2b1655c2605f@suse.com> In-Reply-To: <20231031-send-lp-kselftests-v3-0-2b1655c2605f@suse.com> To: Shuah Khan , Jonathan Corbet , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , Joe Lawrence Cc: linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, live-patching@vger.kernel.org, Marcos Paulo de Souza X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1698786668; l=34665; i=mpdesouza@suse.com; s=20231031; h=from:subject:message-id; bh=BBWE+LSNCi68hJKHFzD8MPzR085Lxuwv6bRi5yu5Ps8=; b=lrYsKxn6PZcsva71dcimVjQJoWHPfQQmwWCXE9sIGNyjmsNrLgHuXkdPOQ+nDRXxKHvzoM6OpeLH IKcfv67aCuvl5oGcnfwzU0btkOyHqVAwRhxqnXQ7RkhxuTnt8PVs X-Developer-Key: i=mpdesouza@suse.com; a=ed25519; pk=/Ni/TsKkr69EOmdZXkp1Q/BlzDonbOBRsfPa18ySIwU= X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Tue, 31 Oct 2023 14:11:32 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781306955831948751 X-GMAIL-MSGID: 1781306955831948751 The modules are being moved from lib/livepatch to tools/testing/selftests/livepatch/test_modules. This code moving will allow writing more complex tests, like for example an userspace C code that will call a livepatched kernel function. The modules are now built as out-of-tree modules, but being part of the kernel source means they will be maintained. Another advantage of the code moving is to be able to easily change, debug and rebuild the tests by running make on the selftests/livepatch directory, which is not currently possible since the modules on lib/livepatch are build and installed using the "modules" target. The current approach also keeps the ability to execute the tests manually by executing the scripts inside selftests/livepatch directory, as it's currently supported. If the modules are modified, they needed to be rebuilt before running the scripts though. The modules are built before running the selftests when using the kselftest invocations: make kselftest TARGETS=livepatch or make -C tools/testing/selftests/livepatch run_tests Having the modules being built as out-of-modules requires changing the currently used 'modprobe' by 'insmod' and adapt the test scripts that check for the kernel message buffer. As there aren't any modules being built on lib/livepatch, remove the TEST_LIVEPATCH Kconfig and it's references. Note: "make gen_tar" packages the pre-built binaries into the tarball. It means that it will store the test modules pre-built for the kernel running on the build host. Note that these modules need not binary compatible with the kernel built from the same sources. But the same is true for other packaged selftest binaries. The entire kernel sources are needed for rebuilding the selftests on another system. Signed-off-by: Marcos Paulo de Souza --- arch/s390/configs/debug_defconfig | 1 - arch/s390/configs/defconfig | 1 - lib/Kconfig.debug | 22 ---------- lib/Makefile | 2 - lib/livepatch/Makefile | 14 ------ tools/testing/selftests/livepatch/Makefile | 1 + tools/testing/selftests/livepatch/README | 17 +++++--- tools/testing/selftests/livepatch/config | 1 - tools/testing/selftests/livepatch/functions.sh | 34 ++++++--------- .../testing/selftests/livepatch/test-callbacks.sh | 50 +++++++++++----------- tools/testing/selftests/livepatch/test-ftrace.sh | 6 +-- .../testing/selftests/livepatch/test-livepatch.sh | 10 ++--- .../selftests/livepatch/test-shadow-vars.sh | 2 +- tools/testing/selftests/livepatch/test-state.sh | 18 ++++---- tools/testing/selftests/livepatch/test-sysfs.sh | 6 +-- .../selftests/livepatch/test_modules/Makefile | 19 ++++++++ .../test_modules}/test_klp_atomic_replace.c | 0 .../test_modules}/test_klp_callbacks_busy.c | 0 .../test_modules}/test_klp_callbacks_demo.c | 0 .../test_modules}/test_klp_callbacks_demo2.c | 0 .../test_modules}/test_klp_callbacks_mod.c | 0 .../livepatch/test_modules}/test_klp_livepatch.c | 0 .../livepatch/test_modules}/test_klp_shadow_vars.c | 0 .../livepatch/test_modules}/test_klp_state.c | 0 .../livepatch/test_modules}/test_klp_state2.c | 0 .../livepatch/test_modules}/test_klp_state3.c | 0 26 files changed, 89 insertions(+), 115 deletions(-) diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig index 438cd92e6080..9672b9f31710 100644 --- a/arch/s390/configs/debug_defconfig +++ b/arch/s390/configs/debug_defconfig @@ -885,4 +885,3 @@ CONFIG_ATOMIC64_SELFTEST=y CONFIG_STRING_SELFTEST=y CONFIG_TEST_BITOPS=m CONFIG_TEST_BPF=m -CONFIG_TEST_LIVEPATCH=m diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig index 1b8150e50f6a..a8a66264a72d 100644 --- a/arch/s390/configs/defconfig +++ b/arch/s390/configs/defconfig @@ -813,4 +813,3 @@ CONFIG_KPROBES_SANITY_TEST=m CONFIG_PERCPU_TEST=m CONFIG_ATOMIC64_SELFTEST=y CONFIG_TEST_BPF=m -CONFIG_TEST_LIVEPATCH=m diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index fa307f93fa2e..af67c5f5d031 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2862,28 +2862,6 @@ config TEST_MEMCAT_P If unsure, say N. -config TEST_LIVEPATCH - tristate "Test livepatching" - default n - depends on DYNAMIC_DEBUG - depends on LIVEPATCH - depends on m - help - Test kernel livepatching features for correctness. The tests will - load test modules that will be livepatched in various scenarios. - - To run all the livepatching tests: - - make -C tools/testing/selftests TARGETS=livepatch run_tests - - Alternatively, individual tests may be invoked: - - tools/testing/selftests/livepatch/test-callbacks.sh - tools/testing/selftests/livepatch/test-livepatch.sh - tools/testing/selftests/livepatch/test-shadow-vars.sh - - If unsure, say N. - config TEST_OBJAGG tristate "Perform selftest on object aggreration manager" default n diff --git a/lib/Makefile b/lib/Makefile index 740109b6e2c8..b96b280787ca 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -132,8 +132,6 @@ endif obj-$(CONFIG_TEST_FPU) += test_fpu.o CFLAGS_test_fpu.o += $(FPU_CFLAGS) -obj-$(CONFIG_TEST_LIVEPATCH) += livepatch/ - # Some KUnit files (hooks.o) need to be built-in even when KUnit is a module, # so we can't just use obj-$(CONFIG_KUNIT). ifdef CONFIG_KUNIT diff --git a/lib/livepatch/Makefile b/lib/livepatch/Makefile deleted file mode 100644 index dcc912b3478f..000000000000 --- a/lib/livepatch/Makefile +++ /dev/null @@ -1,14 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# Makefile for livepatch test code. - -obj-$(CONFIG_TEST_LIVEPATCH) += test_klp_atomic_replace.o \ - test_klp_callbacks_demo.o \ - test_klp_callbacks_demo2.o \ - test_klp_callbacks_busy.o \ - test_klp_callbacks_mod.o \ - test_klp_livepatch.o \ - test_klp_shadow_vars.o \ - test_klp_state.o \ - test_klp_state2.o \ - test_klp_state3.o diff --git a/tools/testing/selftests/livepatch/Makefile b/tools/testing/selftests/livepatch/Makefile index 02fadc9d55e0..119e2bbebe5d 100644 --- a/tools/testing/selftests/livepatch/Makefile +++ b/tools/testing/selftests/livepatch/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 +TEST_GEN_MODS_DIR := test_modules TEST_PROGS_EXTENDED := functions.sh TEST_PROGS := \ test-livepatch.sh \ diff --git a/tools/testing/selftests/livepatch/README b/tools/testing/selftests/livepatch/README index 0942dd5826f8..c5eb3cb67b66 100644 --- a/tools/testing/selftests/livepatch/README +++ b/tools/testing/selftests/livepatch/README @@ -13,23 +13,26 @@ the message buffer for only the duration of each individual test.) Config ------ -Set these config options and their prerequisites: - -CONFIG_LIVEPATCH=y -CONFIG_TEST_LIVEPATCH=m +Set CONFIG_LIVEPATCH=y option and it's prerequisites. Running the tests ----------------- -Test kernel modules are built as part of lib/ (make modules) and need to -be installed (make modules_install) as the test scripts will modprobe -them. +Test kernel modules are built before running the livepatch selftests. The +modules are located under test_modules directory, and are built as out-of-tree +modules. This is specially useful since the same sources can be built and +tested on systems with different kABI, ensuring they the tests are backwards +compatible. The modules will be loaded by the test scripts using insmod. To run the livepatch selftests, from the top of the kernel source tree: % make -C tools/testing/selftests TARGETS=livepatch run_tests +or + + % make kselftest TARGETS=livepatch + Adding tests ------------ diff --git a/tools/testing/selftests/livepatch/config b/tools/testing/selftests/livepatch/config index ad23100cb27c..e88bf518a23a 100644 --- a/tools/testing/selftests/livepatch/config +++ b/tools/testing/selftests/livepatch/config @@ -1,3 +1,2 @@ CONFIG_LIVEPATCH=y CONFIG_DYNAMIC_DEBUG=y -CONFIG_TEST_LIVEPATCH=m diff --git a/tools/testing/selftests/livepatch/functions.sh b/tools/testing/selftests/livepatch/functions.sh index c8416c54b463..e60cf09491a6 100644 --- a/tools/testing/selftests/livepatch/functions.sh +++ b/tools/testing/selftests/livepatch/functions.sh @@ -127,16 +127,14 @@ function loop_until() { done } -function assert_mod() { - local mod="$1" - - modprobe --dry-run "$mod" &>/dev/null -} - function is_livepatch_mod() { local mod="$1" - if [[ $(modinfo "$mod" | awk '/^livepatch:/{print $NF}') == "Y" ]]; then + if [[ ! -f "test_modules/$mod.ko" ]]; then + die "Can't find \"test_modules/$mod.ko\", try \"make\"" + fi + + if [[ $(modinfo "test_modules/$mod.ko" | awk '/^livepatch:/{print $NF}') == "Y" ]]; then return 0 fi @@ -146,9 +144,9 @@ function is_livepatch_mod() { function __load_mod() { local mod="$1"; shift - local msg="% modprobe $mod $*" + local msg="% insmod test_modules/$mod.ko $*" log "${msg%% }" - ret=$(modprobe "$mod" "$@" 2>&1) + ret=$(insmod "test_modules/$mod.ko" "$@" 2>&1) if [[ "$ret" != "" ]]; then die "$ret" fi @@ -161,13 +159,10 @@ function __load_mod() { # load_mod(modname, params) - load a kernel module # modname - module name to load -# params - module parameters to pass to modprobe +# params - module parameters to pass to insmod function load_mod() { local mod="$1"; shift - assert_mod "$mod" || - skip "unable to load module ${mod}, verify CONFIG_TEST_LIVEPATCH=m and run self-tests as root" - is_livepatch_mod "$mod" && die "use load_lp() to load the livepatch module $mod" @@ -177,13 +172,10 @@ function load_mod() { # load_lp_nowait(modname, params) - load a kernel module with a livepatch # but do not wait on until the transition finishes # modname - module name to load -# params - module parameters to pass to modprobe +# params - module parameters to pass to insmod function load_lp_nowait() { local mod="$1"; shift - assert_mod "$mod" || - skip "unable to load module ${mod}, verify CONFIG_TEST_LIVEPATCH=m and run self-tests as root" - is_livepatch_mod "$mod" || die "module $mod is not a livepatch" @@ -196,7 +188,7 @@ function load_lp_nowait() { # load_lp(modname, params) - load a kernel module with a livepatch # modname - module name to load -# params - module parameters to pass to modprobe +# params - module parameters to pass to insmod function load_lp() { local mod="$1"; shift @@ -209,13 +201,13 @@ function load_lp() { # load_failing_mod(modname, params) - load a kernel module, expect to fail # modname - module name to load -# params - module parameters to pass to modprobe +# params - module parameters to pass to insmod function load_failing_mod() { local mod="$1"; shift - local msg="% modprobe $mod $*" + local msg="% insmod test_modules/$mod.ko $*" log "${msg%% }" - ret=$(modprobe "$mod" "$@" 2>&1) + ret=$(insmod "test_modules/$mod.ko" "$@" 2>&1) if [[ "$ret" == "" ]]; then die "$mod unexpectedly loaded" fi diff --git a/tools/testing/selftests/livepatch/test-callbacks.sh b/tools/testing/selftests/livepatch/test-callbacks.sh index 90b26dbb2626..32b150e25b10 100755 --- a/tools/testing/selftests/livepatch/test-callbacks.sh +++ b/tools/testing/selftests/livepatch/test-callbacks.sh @@ -34,9 +34,9 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH unload_mod $MOD_TARGET -check_result "% modprobe $MOD_TARGET +check_result "% insmod test_modules/$MOD_TARGET.ko $MOD_TARGET: ${MOD_TARGET}_init -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -81,7 +81,7 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH unload_mod $MOD_TARGET -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -89,7 +89,7 @@ livepatch: '$MOD_LIVEPATCH': starting patching transition livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux livepatch: '$MOD_LIVEPATCH': patching complete -% modprobe $MOD_TARGET +% insmod test_modules/$MOD_TARGET.ko livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init $MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init @@ -129,9 +129,9 @@ unload_mod $MOD_TARGET disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_TARGET +check_result "% insmod test_modules/$MOD_TARGET.ko $MOD_TARGET: ${MOD_TARGET}_init -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -177,7 +177,7 @@ unload_mod $MOD_TARGET disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -185,7 +185,7 @@ livepatch: '$MOD_LIVEPATCH': starting patching transition livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux livepatch: '$MOD_LIVEPATCH': patching complete -% modprobe $MOD_TARGET +% insmod test_modules/$MOD_TARGET.ko livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init $MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init @@ -219,7 +219,7 @@ load_lp $MOD_LIVEPATCH disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -254,9 +254,9 @@ load_mod $MOD_TARGET load_failing_mod $MOD_LIVEPATCH pre_patch_ret=-19 unload_mod $MOD_TARGET -check_result "% modprobe $MOD_TARGET +check_result "% insmod test_modules/$MOD_TARGET.ko $MOD_TARGET: ${MOD_TARGET}_init -% modprobe $MOD_LIVEPATCH pre_patch_ret=-19 +% insmod test_modules/$MOD_LIVEPATCH.ko pre_patch_ret=-19 livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition test_klp_callbacks_demo: pre_patch_callback: vmlinux @@ -265,7 +265,7 @@ livepatch: failed to enable patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch livepatch: '$MOD_LIVEPATCH': completing unpatching transition livepatch: '$MOD_LIVEPATCH': unpatching complete -modprobe: ERROR: could not insert '$MOD_LIVEPATCH': No such device +insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: No such device % rmmod $MOD_TARGET $MOD_TARGET: ${MOD_TARGET}_exit" @@ -295,7 +295,7 @@ load_failing_mod $MOD_TARGET disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -304,12 +304,12 @@ livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux livepatch: '$MOD_LIVEPATCH': patching complete % echo -19 > /sys/module/$MOD_LIVEPATCH/parameters/pre_patch_ret -% modprobe $MOD_TARGET +% insmod test_modules/$MOD_TARGET.ko livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init livepatch: pre-patch callback failed for object '$MOD_TARGET' livepatch: patch '$MOD_LIVEPATCH' failed for module '$MOD_TARGET', refusing to load module '$MOD_TARGET' -modprobe: ERROR: could not insert '$MOD_TARGET': No such device +insmod: ERROR: could not insert module test_modules/$MOD_TARGET.ko: No such device % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH/enabled livepatch: '$MOD_LIVEPATCH': initializing unpatching transition $MOD_LIVEPATCH: pre_unpatch_callback: vmlinux @@ -340,11 +340,11 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH unload_mod $MOD_TARGET_BUSY -check_result "% modprobe $MOD_TARGET_BUSY block_transition=N +check_result "% insmod test_modules/$MOD_TARGET_BUSY.ko block_transition=N $MOD_TARGET_BUSY: ${MOD_TARGET_BUSY}_init $MOD_TARGET_BUSY: busymod_work_func enter $MOD_TARGET_BUSY: busymod_work_func exit -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -354,7 +354,7 @@ livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux $MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state livepatch: '$MOD_LIVEPATCH': patching complete -% modprobe $MOD_TARGET +% insmod test_modules/$MOD_TARGET.ko livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init $MOD_LIVEPATCH: post_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init @@ -421,16 +421,16 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH unload_mod $MOD_TARGET_BUSY -check_result "% modprobe $MOD_TARGET_BUSY block_transition=Y +check_result "% insmod test_modules/$MOD_TARGET_BUSY.ko block_transition=Y $MOD_TARGET_BUSY: ${MOD_TARGET_BUSY}_init $MOD_TARGET_BUSY: busymod_work_func enter -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET_BUSY -> [MODULE_STATE_LIVE] Normal state livepatch: '$MOD_LIVEPATCH': starting patching transition -% modprobe $MOD_TARGET +% insmod test_modules/$MOD_TARGET.ko livepatch: applying patch '$MOD_LIVEPATCH' to loading module '$MOD_TARGET' $MOD_LIVEPATCH: pre_patch_callback: $MOD_TARGET -> [MODULE_STATE_COMING] Full formed, running module_init $MOD_TARGET: ${MOD_TARGET}_init @@ -467,7 +467,7 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -475,7 +475,7 @@ livepatch: '$MOD_LIVEPATCH': starting patching transition livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux livepatch: '$MOD_LIVEPATCH': patching complete -% modprobe $MOD_LIVEPATCH2 +% insmod test_modules/$MOD_LIVEPATCH2.ko livepatch: enabling patch '$MOD_LIVEPATCH2' livepatch: '$MOD_LIVEPATCH2': initializing patching transition $MOD_LIVEPATCH2: pre_patch_callback: vmlinux @@ -523,7 +523,7 @@ disable_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -531,7 +531,7 @@ livepatch: '$MOD_LIVEPATCH': starting patching transition livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux livepatch: '$MOD_LIVEPATCH': patching complete -% modprobe $MOD_LIVEPATCH2 replace=1 +% insmod test_modules/$MOD_LIVEPATCH2.ko replace=1 livepatch: enabling patch '$MOD_LIVEPATCH2' livepatch: '$MOD_LIVEPATCH2': initializing patching transition $MOD_LIVEPATCH2: pre_patch_callback: vmlinux diff --git a/tools/testing/selftests/livepatch/test-ftrace.sh b/tools/testing/selftests/livepatch/test-ftrace.sh index 825540a5194d..730218bce99c 100755 --- a/tools/testing/selftests/livepatch/test-ftrace.sh +++ b/tools/testing/selftests/livepatch/test-ftrace.sh @@ -35,7 +35,7 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH check_result "livepatch: kernel.ftrace_enabled = 0 -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition livepatch: failed to register ftrace handler for function 'cmdline_proc_show' (-16) @@ -44,9 +44,9 @@ livepatch: failed to enable patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': canceling patching transition, going to unpatch livepatch: '$MOD_LIVEPATCH': completing unpatching transition livepatch: '$MOD_LIVEPATCH': unpatching complete -modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Device or resource busy +insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Device or resource busy livepatch: kernel.ftrace_enabled = 1 -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition livepatch: '$MOD_LIVEPATCH': starting patching transition diff --git a/tools/testing/selftests/livepatch/test-livepatch.sh b/tools/testing/selftests/livepatch/test-livepatch.sh index 5fe79ac34be1..e3455a6b1158 100755 --- a/tools/testing/selftests/livepatch/test-livepatch.sh +++ b/tools/testing/selftests/livepatch/test-livepatch.sh @@ -31,7 +31,7 @@ if [[ "$(cat /proc/cmdline)" == "$MOD_LIVEPATCH: this has been live patched" ]] die "livepatch kselftest(s) failed" fi -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition livepatch: '$MOD_LIVEPATCH': starting patching transition @@ -75,14 +75,14 @@ unload_lp $MOD_LIVEPATCH grep 'live patched' /proc/cmdline > /dev/kmsg grep 'live patched' /proc/meminfo > /dev/kmsg -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition livepatch: '$MOD_LIVEPATCH': starting patching transition livepatch: '$MOD_LIVEPATCH': completing patching transition livepatch: '$MOD_LIVEPATCH': patching complete $MOD_LIVEPATCH: this has been live patched -% modprobe $MOD_REPLACE replace=0 +% insmod test_modules/$MOD_REPLACE.ko replace=0 livepatch: enabling patch '$MOD_REPLACE' livepatch: '$MOD_REPLACE': initializing patching transition livepatch: '$MOD_REPLACE': starting patching transition @@ -135,14 +135,14 @@ unload_lp $MOD_REPLACE grep 'live patched' /proc/cmdline > /dev/kmsg grep 'live patched' /proc/meminfo > /dev/kmsg -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition livepatch: '$MOD_LIVEPATCH': starting patching transition livepatch: '$MOD_LIVEPATCH': completing patching transition livepatch: '$MOD_LIVEPATCH': patching complete $MOD_LIVEPATCH: this has been live patched -% modprobe $MOD_REPLACE replace=1 +% insmod test_modules/$MOD_REPLACE.ko replace=1 livepatch: enabling patch '$MOD_REPLACE' livepatch: '$MOD_REPLACE': initializing patching transition livepatch: '$MOD_REPLACE': starting patching transition diff --git a/tools/testing/selftests/livepatch/test-shadow-vars.sh b/tools/testing/selftests/livepatch/test-shadow-vars.sh index e04cb354f56b..1218c155bffe 100755 --- a/tools/testing/selftests/livepatch/test-shadow-vars.sh +++ b/tools/testing/selftests/livepatch/test-shadow-vars.sh @@ -16,7 +16,7 @@ start_test "basic shadow variable API" load_mod $MOD_TEST unload_mod $MOD_TEST -check_result "% modprobe $MOD_TEST +check_result "% insmod test_modules/$MOD_TEST.ko $MOD_TEST: klp_shadow_get(obj=PTR1, id=0x1234) = PTR0 $MOD_TEST: got expected NULL result $MOD_TEST: shadow_ctor: PTR3 -> PTR2 diff --git a/tools/testing/selftests/livepatch/test-state.sh b/tools/testing/selftests/livepatch/test-state.sh index 38656721c958..10a52ac06185 100755 --- a/tools/testing/selftests/livepatch/test-state.sh +++ b/tools/testing/selftests/livepatch/test-state.sh @@ -19,7 +19,7 @@ load_lp $MOD_LIVEPATCH disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -51,7 +51,7 @@ unload_lp $MOD_LIVEPATCH disable_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH2 -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition $MOD_LIVEPATCH: pre_patch_callback: vmlinux @@ -61,7 +61,7 @@ livepatch: '$MOD_LIVEPATCH': completing patching transition $MOD_LIVEPATCH: post_patch_callback: vmlinux $MOD_LIVEPATCH: fix_console_loglevel: fixing console_loglevel livepatch: '$MOD_LIVEPATCH': patching complete -% modprobe $MOD_LIVEPATCH2 +% insmod test_modules/$MOD_LIVEPATCH2.ko livepatch: enabling patch '$MOD_LIVEPATCH2' livepatch: '$MOD_LIVEPATCH2': initializing patching transition $MOD_LIVEPATCH2: pre_patch_callback: vmlinux @@ -96,7 +96,7 @@ disable_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH3 -check_result "% modprobe $MOD_LIVEPATCH2 +check_result "% insmod test_modules/$MOD_LIVEPATCH2.ko livepatch: enabling patch '$MOD_LIVEPATCH2' livepatch: '$MOD_LIVEPATCH2': initializing patching transition $MOD_LIVEPATCH2: pre_patch_callback: vmlinux @@ -106,7 +106,7 @@ livepatch: '$MOD_LIVEPATCH2': completing patching transition $MOD_LIVEPATCH2: post_patch_callback: vmlinux $MOD_LIVEPATCH2: fix_console_loglevel: fixing console_loglevel livepatch: '$MOD_LIVEPATCH2': patching complete -% modprobe $MOD_LIVEPATCH3 +% insmod test_modules/$MOD_LIVEPATCH3.ko livepatch: enabling patch '$MOD_LIVEPATCH3' livepatch: '$MOD_LIVEPATCH3': initializing patching transition $MOD_LIVEPATCH3: pre_patch_callback: vmlinux @@ -117,7 +117,7 @@ $MOD_LIVEPATCH3: post_patch_callback: vmlinux $MOD_LIVEPATCH3: fix_console_loglevel: taking over the console_loglevel change livepatch: '$MOD_LIVEPATCH3': patching complete % rmmod $MOD_LIVEPATCH2 -% modprobe $MOD_LIVEPATCH2 +% insmod test_modules/$MOD_LIVEPATCH2.ko livepatch: enabling patch '$MOD_LIVEPATCH2' livepatch: '$MOD_LIVEPATCH2': initializing patching transition $MOD_LIVEPATCH2: pre_patch_callback: vmlinux @@ -149,7 +149,7 @@ load_failing_mod $MOD_LIVEPATCH disable_lp $MOD_LIVEPATCH2 unload_lp $MOD_LIVEPATCH2 -check_result "% modprobe $MOD_LIVEPATCH2 +check_result "% insmod test_modules/$MOD_LIVEPATCH2.ko livepatch: enabling patch '$MOD_LIVEPATCH2' livepatch: '$MOD_LIVEPATCH2': initializing patching transition $MOD_LIVEPATCH2: pre_patch_callback: vmlinux @@ -159,9 +159,9 @@ livepatch: '$MOD_LIVEPATCH2': completing patching transition $MOD_LIVEPATCH2: post_patch_callback: vmlinux $MOD_LIVEPATCH2: fix_console_loglevel: fixing console_loglevel livepatch: '$MOD_LIVEPATCH2': patching complete -% modprobe $MOD_LIVEPATCH +% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: Livepatch patch ($MOD_LIVEPATCH) is not compatible with the already installed livepatches. -modprobe: ERROR: could not insert '$MOD_LIVEPATCH': Invalid argument +insmod: ERROR: could not insert module test_modules/$MOD_LIVEPATCH.ko: Invalid parameters % echo 0 > /sys/kernel/livepatch/$MOD_LIVEPATCH2/enabled livepatch: '$MOD_LIVEPATCH2': initializing unpatching transition $MOD_LIVEPATCH2: pre_unpatch_callback: vmlinux diff --git a/tools/testing/selftests/livepatch/test-sysfs.sh b/tools/testing/selftests/livepatch/test-sysfs.sh index 7f76f280189a..6c646afa7395 100755 --- a/tools/testing/selftests/livepatch/test-sysfs.sh +++ b/tools/testing/selftests/livepatch/test-sysfs.sh @@ -27,7 +27,7 @@ disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe $MOD_LIVEPATCH +check_result "% insmod test_modules/$MOD_LIVEPATCH.ko livepatch: enabling patch '$MOD_LIVEPATCH' livepatch: '$MOD_LIVEPATCH': initializing patching transition livepatch: '$MOD_LIVEPATCH': starting patching transition @@ -56,7 +56,7 @@ check_sysfs_value "$MOD_LIVEPATCH" "$MOD_TARGET/patched" "0" disable_lp $MOD_LIVEPATCH unload_lp $MOD_LIVEPATCH -check_result "% modprobe test_klp_callbacks_demo +check_result "% insmod test_modules/test_klp_callbacks_demo.ko livepatch: enabling patch 'test_klp_callbacks_demo' livepatch: 'test_klp_callbacks_demo': initializing patching transition test_klp_callbacks_demo: pre_patch_callback: vmlinux @@ -64,7 +64,7 @@ livepatch: 'test_klp_callbacks_demo': starting patching transition livepatch: 'test_klp_callbacks_demo': completing patching transition test_klp_callbacks_demo: post_patch_callback: vmlinux livepatch: 'test_klp_callbacks_demo': patching complete -% modprobe test_klp_callbacks_mod +% insmod test_modules/test_klp_callbacks_mod.ko livepatch: applying patch 'test_klp_callbacks_demo' to loading module 'test_klp_callbacks_mod' test_klp_callbacks_demo: pre_patch_callback: test_klp_callbacks_mod -> [MODULE_STATE_COMING] Full formed, running module_init test_klp_callbacks_demo: post_patch_callback: test_klp_callbacks_mod -> [MODULE_STATE_COMING] Full formed, running module_init diff --git a/tools/testing/selftests/livepatch/test_modules/Makefile b/tools/testing/selftests/livepatch/test_modules/Makefile new file mode 100644 index 000000000000..6f7c2103d27d --- /dev/null +++ b/tools/testing/selftests/livepatch/test_modules/Makefile @@ -0,0 +1,19 @@ +TESTMODS_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= /lib/modules/$(shell uname -r)/build + +obj-m += test_klp_atomic_replace.o \ + test_klp_callbacks_busy.o \ + test_klp_callbacks_demo.o \ + test_klp_callbacks_demo2.o \ + test_klp_callbacks_mod.o \ + test_klp_livepatch.o \ + test_klp_state.o \ + test_klp_state2.o \ + test_klp_state3.o \ + test_klp_shadow_vars.o + +modules: + $(Q)$(MAKE) -C $(KDIR) modules KBUILD_EXTMOD=$(TESTMODS_DIR) + +clean: + $(Q)$(MAKE) -C $(KDIR) clean KBUILD_EXTMOD=$(TESTMODS_DIR) diff --git a/lib/livepatch/test_klp_atomic_replace.c b/tools/testing/selftests/livepatch/test_modules/test_klp_atomic_replace.c similarity index 100% rename from lib/livepatch/test_klp_atomic_replace.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_atomic_replace.c diff --git a/lib/livepatch/test_klp_callbacks_busy.c b/tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_busy.c similarity index 100% rename from lib/livepatch/test_klp_callbacks_busy.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_busy.c diff --git a/lib/livepatch/test_klp_callbacks_demo.c b/tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_demo.c similarity index 100% rename from lib/livepatch/test_klp_callbacks_demo.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_demo.c diff --git a/lib/livepatch/test_klp_callbacks_demo2.c b/tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_demo2.c similarity index 100% rename from lib/livepatch/test_klp_callbacks_demo2.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_demo2.c diff --git a/lib/livepatch/test_klp_callbacks_mod.c b/tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_mod.c similarity index 100% rename from lib/livepatch/test_klp_callbacks_mod.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_callbacks_mod.c diff --git a/lib/livepatch/test_klp_livepatch.c b/tools/testing/selftests/livepatch/test_modules/test_klp_livepatch.c similarity index 100% rename from lib/livepatch/test_klp_livepatch.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_livepatch.c diff --git a/lib/livepatch/test_klp_shadow_vars.c b/tools/testing/selftests/livepatch/test_modules/test_klp_shadow_vars.c similarity index 100% rename from lib/livepatch/test_klp_shadow_vars.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_shadow_vars.c diff --git a/lib/livepatch/test_klp_state.c b/tools/testing/selftests/livepatch/test_modules/test_klp_state.c similarity index 100% rename from lib/livepatch/test_klp_state.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_state.c diff --git a/lib/livepatch/test_klp_state2.c b/tools/testing/selftests/livepatch/test_modules/test_klp_state2.c similarity index 100% rename from lib/livepatch/test_klp_state2.c rename to tools/testing/selftests/livepatch/test_modules/test_klp_state2.c diff --git a/lib/livepatch/test_klp_state3.c b/tools/testing/selftests/livepatch/test_modules/test_klp_state3.c similarity index 100% rename from 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[23.128.96.35]) by mx.google.com with ESMTPS id fh34-20020a056a00392200b0069014d63f21si191078pfb.148.2023.10.31.14.12.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Oct 2023 14:12:06 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) client-ip=23.128.96.35; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b=pkhLf6OQ; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by groat.vger.email (Postfix) with ESMTP id 5850880B79C0; Tue, 31 Oct 2023 14:11:57 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at groat.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344823AbjJaVLb (ORCPT + 33 others); Tue, 31 Oct 2023 17:11:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344909AbjJaVL0 (ORCPT ); Tue, 31 Oct 2023 17:11:26 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BFE68115; Tue, 31 Oct 2023 14:11:23 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 7DAF821A85; Tue, 31 Oct 2023 21:11:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1698786682; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YWFVODM4L9r3H5eDf/XnrPEj/bstgrOYhDzRCk+s4bA=; b=pkhLf6OQMHUKBRE97JdtuK1eC3ltvkvcU9D0aX5ISYMxQverONZ25L/FHbwNFVxq8OnYVf NxkiheKbmT3T05LcPlcZwT/fZkxPNK4VaxF7tFsqvIpzbLZ+XtjHUEgfXQ2mtyPC0IJkR0 QyUmasK8efV8mGhomww2GWHvcopuDag= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 079F2138EF; Tue, 31 Oct 2023 21:11:21 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id /BuDL3ltQWXnWgAAMHmgww (envelope-from ); Tue, 31 Oct 2023 21:11:21 +0000 From: Marcos Paulo de Souza Date: Tue, 31 Oct 2023 18:10:53 -0300 Subject: [PATCH v3 3/3] selftests: livepatch: Test livepatching a heavily called syscall MIME-Version: 1.0 Message-Id: <20231031-send-lp-kselftests-v3-3-2b1655c2605f@suse.com> References: <20231031-send-lp-kselftests-v3-0-2b1655c2605f@suse.com> In-Reply-To: <20231031-send-lp-kselftests-v3-0-2b1655c2605f@suse.com> To: Shuah Khan , Jonathan Corbet , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , Joe Lawrence Cc: linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, live-patching@vger.kernel.org, Marcos Paulo de Souza X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1698786668; l=8723; i=mpdesouza@suse.com; s=20231031; h=from:subject:message-id; bh=b5alYQkuOfzrRyAofNX67gkTWpNDU3R7ywSH8MEJOJw=; b=Y/c4XFn5/DNnfD+A2NRd7SogxPW1b2FAVd+5f/nyOQga2n13FnB8BjpD4WmW2TkeL9AeUp36em2r ADlmfPecALcVfTV2J55tvrKqGZPULrgIggdl3jZ+qD8Wx4B5kwf2 X-Developer-Key: i=mpdesouza@suse.com; a=ed25519; pk=/Ni/TsKkr69EOmdZXkp1Q/BlzDonbOBRsfPa18ySIwU= X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Tue, 31 Oct 2023 14:11:57 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1781306989894752063 X-GMAIL-MSGID: 1781306989894752063 The test proves that a syscall can be livepatched. It is interesting because syscalls are called a tricky way. Also the process gets livepatched either when sleeping in the userspace or when entering or leaving the kernel space. The livepatch is a bit tricky: 1. The syscall function name is architecture specific. Also ARCH_HAS_SYSCALL_WRAPPER must be taken in account. 2. The syscall must stay working the same way for other processes on the system. It is solved by decrementing a counter only for PIDs of the test processes. It means that the test processes has to call the livepatched syscall at least once. The test creates one userspace process per online cpu. The processes are calling getpid in a busy loop. The intention is to create random locations when the livepatch gets enabled. Nothing is guarantted. The magic is in the randomness. Signed-off-by: Marcos Paulo de Souza --- tools/testing/selftests/livepatch/Makefile | 4 +- tools/testing/selftests/livepatch/test-syscall.sh | 53 ++++++++++ .../selftests/livepatch/test_klp-call_getpid.c | 44 ++++++++ .../selftests/livepatch/test_modules/Makefile | 3 +- .../livepatch/test_modules/test_klp_syscall.c | 116 +++++++++++++++++++++ 5 files changed, 218 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/livepatch/Makefile b/tools/testing/selftests/livepatch/Makefile index 119e2bbebe5d..35418a4790be 100644 --- a/tools/testing/selftests/livepatch/Makefile +++ b/tools/testing/selftests/livepatch/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 +TEST_GEN_FILES := test_klp-call_getpid TEST_GEN_MODS_DIR := test_modules TEST_PROGS_EXTENDED := functions.sh TEST_PROGS := \ @@ -8,7 +9,8 @@ TEST_PROGS := \ test-shadow-vars.sh \ test-state.sh \ test-ftrace.sh \ - test-sysfs.sh + test-sysfs.sh \ + test-syscall.sh TEST_FILES := settings diff --git a/tools/testing/selftests/livepatch/test-syscall.sh b/tools/testing/selftests/livepatch/test-syscall.sh new file mode 100755 index 000000000000..b76a881d4013 --- /dev/null +++ b/tools/testing/selftests/livepatch/test-syscall.sh @@ -0,0 +1,53 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2023 SUSE +# Author: Marcos Paulo de Souza + +. $(dirname $0)/functions.sh + +MOD_SYSCALL=test_klp_syscall + +setup_config + +# - Start _NRPROC processes calling getpid and load a livepatch to patch the +# getpid syscall. Check if all the processes transitioned to the livepatched +# state. + +start_test "patch getpid syscall while being heavily hammered" + +for i in $(seq 1 $(getconf _NPROCESSORS_ONLN)); do + ./test_klp-call_getpid & + pids[$i]="$!" +done + +pid_list=$(echo ${pids[@]} | tr ' ' ',') +load_lp $MOD_SYSCALL klp_pids=$pid_list + +# wait for all tasks to transition to patched state +loop_until 'grep -q '^0$' /sys/kernel/test_klp_syscall/npids' + +pending_pids=$(cat /sys/kernel/test_klp_syscall/npids) +log "$MOD_SYSCALL: Remaining not livepatched processes: $pending_pids" + +for pid in ${pids[@]}; do + kill $pid || true +done + +disable_lp $MOD_SYSCALL +unload_lp $MOD_SYSCALL + +check_result "% insmod test_modules/$MOD_SYSCALL.ko klp_pids=$pid_list +livepatch: enabling patch '$MOD_SYSCALL' +livepatch: '$MOD_SYSCALL': initializing patching transition +livepatch: '$MOD_SYSCALL': starting patching transition +livepatch: '$MOD_SYSCALL': completing patching transition +livepatch: '$MOD_SYSCALL': patching complete +$MOD_SYSCALL: Remaining not livepatched processes: 0 +% echo 0 > /sys/kernel/livepatch/$MOD_SYSCALL/enabled +livepatch: '$MOD_SYSCALL': initializing unpatching transition +livepatch: '$MOD_SYSCALL': starting unpatching transition +livepatch: '$MOD_SYSCALL': completing unpatching transition +livepatch: '$MOD_SYSCALL': unpatching complete +% rmmod $MOD_SYSCALL" + +exit 0 diff --git a/tools/testing/selftests/livepatch/test_klp-call_getpid.c b/tools/testing/selftests/livepatch/test_klp-call_getpid.c new file mode 100644 index 000000000000..ce321a2d7308 --- /dev/null +++ b/tools/testing/selftests/livepatch/test_klp-call_getpid.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2023 SUSE + * Authors: Libor Pechacek + * Marcos Paulo de Souza + */ + +#include +#include +#include +#include +#include + +static int stop; +static int sig_int; + +void hup_handler(int signum) +{ + stop = 1; +} + +void int_handler(int signum) +{ + stop = 1; + sig_int = 1; +} + +int main(int argc, char *argv[]) +{ + long count = 0; + + signal(SIGHUP, &hup_handler); + signal(SIGINT, &int_handler); + + while (!stop) { + (void)syscall(SYS_getpid); + count++; + } + + if (sig_int) + printf("%ld iterations done\n", count); + + return 0; +} diff --git a/tools/testing/selftests/livepatch/test_modules/Makefile b/tools/testing/selftests/livepatch/test_modules/Makefile index 6f7c2103d27d..f5e880269bff 100644 --- a/tools/testing/selftests/livepatch/test_modules/Makefile +++ b/tools/testing/selftests/livepatch/test_modules/Makefile @@ -10,7 +10,8 @@ obj-m += test_klp_atomic_replace.o \ test_klp_state.o \ test_klp_state2.o \ test_klp_state3.o \ - test_klp_shadow_vars.o + test_klp_shadow_vars.o \ + test_klp_syscall.o modules: $(Q)$(MAKE) -C $(KDIR) modules KBUILD_EXTMOD=$(TESTMODS_DIR) diff --git a/tools/testing/selftests/livepatch/test_modules/test_klp_syscall.c b/tools/testing/selftests/livepatch/test_modules/test_klp_syscall.c new file mode 100644 index 000000000000..619496cc3481 --- /dev/null +++ b/tools/testing/selftests/livepatch/test_modules/test_klp_syscall.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2017-2023 SUSE + * Authors: Libor Pechacek + * Nicolai Stange + * Marcos Paulo de Souza + */ + +#include +#include +#include +#include +#include + +#if defined(__x86_64__) +#define FN_PREFIX __x64_ +#elif defined(__s390x__) +#define FN_PREFIX __s390x_ +#elif defined(__aarch64__) +#define FN_PREFIX __arm64_ +#else +/* powerpc does not select ARCH_HAS_SYSCALL_WRAPPER */ +#define FN_PREFIX +#endif + +/* Protects klp_pids */ +static DEFINE_MUTEX(kpid_mutex); + +static unsigned int npids, npids_pending; +static int klp_pids[NR_CPUS]; +module_param_array(klp_pids, int, &npids_pending, 0); +MODULE_PARM_DESC(klp_pids, "Array of pids to be transitioned to livepatched state."); + +static ssize_t npids_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + return sprintf(buf, "%u\n", npids_pending); +} + +static struct kobj_attribute klp_attr = __ATTR_RO(npids); +static struct kobject *klp_kobj; + +asmlinkage long lp_sys_getpid(void) +{ + int i; + + mutex_lock(&kpid_mutex); + if (npids_pending > 0) { + for (i = 0; i < npids; i++) { + if (current->pid == klp_pids[i]) { + klp_pids[i] = 0; + npids_pending--; + break; + } + } + } + mutex_unlock(&kpid_mutex); + + return task_tgid_vnr(current); +} + +static struct klp_func vmlinux_funcs[] = { + { + .old_name = __stringify(FN_PREFIX) "sys_getpid", + .new_func = lp_sys_getpid, + }, {} +}; + +static struct klp_object objs[] = { + { + /* name being NULL means vmlinux */ + .funcs = vmlinux_funcs, + }, {} +}; + +static struct klp_patch patch = { + .mod = THIS_MODULE, + .objs = objs, +}; + +static int livepatch_init(void) +{ + int ret; + + klp_kobj = kobject_create_and_add("test_klp_syscall", kernel_kobj); + if (!klp_kobj) + return -ENOMEM; + + ret = sysfs_create_file(klp_kobj, &klp_attr.attr); + if (ret) { + kobject_put(klp_kobj); + return ret; + } + + /* + * Save the number pids to transition to livepatched state before the + * number of pending pids is decremented. + */ + npids = npids_pending; + + return klp_enable_patch(&patch); +} + +static void livepatch_exit(void) +{ + kobject_put(klp_kobj); +} + +module_init(livepatch_init); +module_exit(livepatch_exit); +MODULE_LICENSE("GPL"); +MODULE_INFO(livepatch, "Y"); +MODULE_AUTHOR("Libor Pechacek "); +MODULE_AUTHOR("Nicolai Stange "); +MODULE_AUTHOR("Marcos Paulo de Souza "); +MODULE_DESCRIPTION("Livepatch test: syscall transition");