Received: by 2002:a05:7412:bbc7:b0:fc:a2b0:25d7 with SMTP id kh7csp2277312rdb; Mon, 5 Feb 2024 01:06:05 -0800 (PST) X-Google-Smtp-Source: AGHT+IGMzLWBMDDXQVkVCnreFbSGAx9IsJ8eE/d2cWvlA/r9fwEBEq119IMpYJW9JlH/nwF4HO16 X-Received: by 2002:aa7:8a4f:0:b0:6d9:9613:cb9e with SMTP id n15-20020aa78a4f000000b006d99613cb9emr11791285pfa.29.1707123965022; Mon, 05 Feb 2024 01:06:05 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1707123965; cv=pass; d=google.com; s=arc-20160816; b=psnoeijAR8oL5xW6EtfPcLoEBO5UMNEtvLCOENHp/cVfxYoKvtu7O5fWC2NHduiT4o IFNeaeww3tW0n8TtC1vNtNn1DeFYy08330i5H9/P+hDc0pg6eVXEprPM7ofX+0eY/vvv hBkl7dmZ9kk0uHWacd4wzzzi4+4JxVlry4jC241ofPKhabDRiAaWLpclUU0iUqL5/psL sAvgvsulsMvg62jcdUdt2c0H0NVTj0PX957AXY9PB6YEhZw/EvFNpvR4qH7fonxHzamC XJaOJoTk2oqI7j1zYeU8lcO6k2cNeHn3PTHmoyJlUUvSDNKSQYxjHymRAer9U1pwfIiU ynaw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:message-id:date:subject:cc:to :from:dkim-signature; bh=mp3IqjV4mL2aPdf1tPNFMiYIaoCwoYk+bStjGqy3K98=; fh=tYZ2g1NVSdlgjAGuvN9dQr2jCxBbYkmVWciNMir9rE0=; b=PKUOZVJeF3pXXYKE2fJcXN3p1iHfQpiInGErPqyWoDGqlHb9q9O1HC7Ah2iYFh1sai GbWQkQsRgG6X2egspgWWuoK6h0oCQb+AeLmbSoWg8WQoCryrXVmANyVFpFWpLPb3241y kpIDkwfrbfWDB61cNB7IQDyDlork93ICMchPiDDFZOnjpoXLIB39gsnG/ZueQwOX5lPW wmMj9UuJHbXzMRGdT+D5hlEhRStYQjMb7LzLLhcjmpA3A1lWKy6+QosJCbLenMvKQjeC fXG6cq6sIchejYk1Bq9AF9imYdR1IrZRPmB4r2tWyMaaiqjJBm/IFfO6h6a3PsfHZ15X bO7g==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=LfMl7mV0; arc=pass (i=1 spf=pass spfdomain=chromium.org dkim=pass dkdomain=chromium.org dmarc=pass fromdomain=chromium.org); spf=pass (google.com: domain of linux-kernel+bounces-52241-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-52241-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org X-Forwarded-Encrypted: i=1; AJvYcCUzBvx1B6EJEOLoXucqoazDDDqO5+0HLsBcGPblPfVISmtfI5i7jgGJkih9lP1cOJEYuYEUxj7jRIXSif8h75lioBwzMKVDgFWxVEdOhg== Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id w23-20020a631617000000b005cf94b8d9ddsi5844389pgl.869.2024.02.05.01.06.04 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 01:06:05 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-52241-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=LfMl7mV0; arc=pass (i=1 spf=pass spfdomain=chromium.org dkim=pass dkdomain=chromium.org dmarc=pass fromdomain=chromium.org); spf=pass (google.com: domain of linux-kernel+bounces-52241-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-52241-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id A22A62818B0 for ; Mon, 5 Feb 2024 09:03:57 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 69A7A12B69; Mon, 5 Feb 2024 09:03:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="LfMl7mV0" Received: from mail-pj1-f43.google.com (mail-pj1-f43.google.com [209.85.216.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1236B125C3 for ; Mon, 5 Feb 2024 09:03:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707123820; cv=none; b=Vosh7k6aMzdGAshufS9FZlyfW2StdhMTAXmKFDQfs9Yl1IK+J8anLyLMUgqJud7LgWm+dwGDUfYzR40dTL/yyUmuNU7qU4ZavgEkKuijmL2wABT3eWNxKvnTZnAi0J0ngCmTaeaqrd7zAJuvxrmM9ctkimcCFbGLW5zIJa1xn3A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707123820; c=relaxed/simple; bh=U0IaqYEgUxaoMI0fBY1yJtEGvGyAUmEfSrUJjZ33FhA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=G7a69PWtCKwISqGdfIEaU6r7CbQxVQSNyD/suGioCMIGnZlfq58IRHvhsppFTa3+6Eocl8QM4aTctQtmqgCeI3I61HhMLKL9y7Wc421KrTH+mOzqqshecRniXBprNQBmr8fFFqyxfC0ZytzE13lY0scXZa5h1pan3YV7Sx476tk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=LfMl7mV0; arc=none smtp.client-ip=209.85.216.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Received: by mail-pj1-f43.google.com with SMTP id 98e67ed59e1d1-2954b34ddd0so3523415a91.0 for ; Mon, 05 Feb 2024 01:03:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1707123818; x=1707728618; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=mp3IqjV4mL2aPdf1tPNFMiYIaoCwoYk+bStjGqy3K98=; b=LfMl7mV05OXLy6hdSSBGa9rHKUK/jsAX8o5IfHQCl1mdEtKDbm6Z5T3jVVJghz5dbJ +CriSBVvWW32W3arj2BnUeMTs5jBSS45N9M5oad/bOrG3V3jMe2EGbbc/Sdhz5f+XrEG ShelNW7TGkjJMhuhvHxsxLqWJViCklR00nN6g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707123818; x=1707728618; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=mp3IqjV4mL2aPdf1tPNFMiYIaoCwoYk+bStjGqy3K98=; b=SQH/VXJP/xyOjQuC1ybT44l+HzwMqfQ8j52udqg8xKgKBCoIknQIq8sQmnm565TJTj wZ9onAOE87e+59RdQ17MhtUZRJqB7vS4FIEoPmeHO18J19QSh8f9yuWRfD6V6FX1NB7x Ampmt/72uQzF492Qp/fkMolp7GonqmQic1Rxs7hGitgsmp/S0Uzr8YKGT/Xl+PaDkjie BAUdQ3h24VHCru3g0AAI6FJpxpxN9SjnVdBZ4KSUev52Ng7tbprJ5tXmkab0bQcwKGuJ AP8KoP6/MX2oV/R88zPMHHQb4dlKoLSCNOxPFVW12d29z9hR6fh1eahuGT2ooUXnSNfn WpcA== X-Gm-Message-State: AOJu0YwQPayOZQ3YYCMpUj0I2XVSViRj5vAd9oZ9BlCBuoRrzflztrTP v/YuaAjDPjQvmZRUkCxki1k9rY2bYAll/Jmrls8OO2W5gF3XMfGJjvaSKpKlMg== X-Received: by 2002:a17:90a:b396:b0:293:ed23:c2da with SMTP id e22-20020a17090ab39600b00293ed23c2damr11932866pjr.31.1707123818477; Mon, 05 Feb 2024 01:03:38 -0800 (PST) X-Forwarded-Encrypted: i=0; AJvYcCUq9BeWx1VsVS673oyYEwknMfep8C7cQ3JgH5JRfz2kue0NgAm6Ezy6xS+aPAzwHzBIfOvYupY+YZG4TU2fH6u0kOMtkwYhn9OUb6R2IcCXs1FgVW9F19ZiEZSpXoGqfFGjFt5Sja07XbhobA27GwasIa2kjhZhlHl2zDKLANllLbPrqbpQV5haY2lwjL0G2SksHjrUBDFrJRgj6l/2vDrVEHDXd0HN6G1rMiAbOQI= Received: from www.outflux.net ([198.0.35.241]) by smtp.gmail.com with ESMTPSA id c11-20020a17090a8d0b00b00296b50bb21asm145311pjo.27.2024.02.05.01.03.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 01:03:37 -0800 (PST) From: Kees Cook To: Marco Elver Cc: Kees Cook , kernel test robot , Andrey Konovalov , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-hardening@vger.kernel.org Subject: [PATCH v2] ubsan: Silence W=1 warnings in self-test Date: Mon, 5 Feb 2024 01:03:33 -0800 Message-Id: <20240205090323.it.453-kees@kernel.org> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1751; i=keescook@chromium.org; h=from:subject:message-id; bh=U0IaqYEgUxaoMI0fBY1yJtEGvGyAUmEfSrUJjZ33FhA=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlwKRliQJ3Zrj4Gq/zti8TCPet94FjB/Zy9OG7l x66V+/rIbWJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZcCkZQAKCRCJcvTf3G3A JjSgD/9lepgY25jHskT5SrVcPjJLGvkdPADYl6m4jH2xPgQDdn6CSFODj8EWE5GmvpcOVMJgwC6 7jBV4u6voWcafB/4ANNf+bNgP+8EVId4RaGpxmP3NqGhVF4fstE6F2WdpdKdEfcVBoYKC4JrrxC CyxsVPhvzOOxjiUVPi29gpOw+DJ8Lak4MTF4GGb6UO7RqcW7xvWY6nmekydhfZog2Gg52Orl65q nrcUa0Gyn931e+soRLtInewzTR+nHwTrXHu6S/mQtqGh3+L5qxEPzjs/02+LBNSxH1Jm9cj2jWF xElVm8Bg4JY4jmMqErpWNhde0lL2VnZmEEk5kUp3qhEoXknvT+j+36gihOlLS2kz6PAoFX9Ejoc Ry1EFw5tQnArOVi+P4I2ykYbm6warowICK7N1POFwG0h4liJcjYdt/PuHZE6GRrqZlvabZIk3l5 XxcDJZ4vRdIMs4+HyrMI9ucsvgqER2zSpjFrrowoHX+Uum2zrlLTeKDNfs6b+5gyn2WFx4Rudt4 D9GvS1zUOt69boYoUR3nKDQBzlxFon520tI+qJgPQP13AYafZyVTAq4T6Cndf1lh/v79wZlG2NI jqpW/1XbdMw2wxFLNI5N5E/ybq5bUy9LGjrXv+I9ov+KKidB5mAc8ee0ulimvA6qOIRYZ2ujySl 4U4UVfi GEUKzg2A== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Silence a handful of W=1 warnings in the UBSan selftest, which set variables without using them. For example: lib/test_ubsan.c:101:6: warning: variable 'val1' set but not used [-Wunused-but-set-variable] 101 | int val1 = 10; | ^ Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202401310423.XpCIk6KO-lkp@intel.com/ Signed-off-by: Kees Cook --- v2: - add additional "volatile" annotations for potential future proofing (marco) v1: https://lore.kernel.org/all/20240202094550.work.205-kees@kernel.org/ --- lib/Makefile | 1 + lib/test_ubsan.c | 4 ++-- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/Makefile b/lib/Makefile index 6b09731d8e61..bc36a5c167db 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -69,6 +69,7 @@ obj-$(CONFIG_HASH_KUNIT_TEST) += test_hash.o obj-$(CONFIG_TEST_IDA) += test_ida.o obj-$(CONFIG_TEST_UBSAN) += test_ubsan.o CFLAGS_test_ubsan.o += $(call cc-disable-warning, vla) +CFLAGS_test_ubsan.o += $(call cc-disable-warning, unused-but-set-variable) UBSAN_SANITIZE_test_ubsan.o := y obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o obj-$(CONFIG_TEST_LIST_SORT) += test_list_sort.o diff --git a/lib/test_ubsan.c b/lib/test_ubsan.c index 2062be1f2e80..f4ee2484d4b5 100644 --- a/lib/test_ubsan.c +++ b/lib/test_ubsan.c @@ -23,8 +23,8 @@ static void test_ubsan_divrem_overflow(void) static void test_ubsan_shift_out_of_bounds(void) { volatile int neg = -1, wrap = 4; - int val1 = 10; - int val2 = INT_MAX; + volatile int val1 = 10; + volatile int val2 = INT_MAX; UBSAN_TEST(CONFIG_UBSAN_SHIFT, "negative exponent"); val1 <<= neg; -- 2.34.1