From nobody Sun Apr 5 22:59:03 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8217C54EE9 for ; Tue, 13 Sep 2022 18:20:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232095AbiIMSUV (ORCPT ); Tue, 13 Sep 2022 14:20:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231793AbiIMSTw (ORCPT ); Tue, 13 Sep 2022 14:19:52 -0400 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29FCB11A0B for ; Tue, 13 Sep 2022 10:31:44 -0700 (PDT) Received: by mail-pj1-x102c.google.com with SMTP id a5-20020a17090aa50500b002008eeb040eso1744812pjq.1 for ; Tue, 13 Sep 2022 10:31:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=Gw0b/81HfJ5tL+5LyBxFbpOnUFRI9K6fakOJwgdIs4w=; b=L/oqvvV6GOLA1AiyhHGZl5HHSX6HegtB0t/8UtsP/YHCaFwH7cWF5SpmdWwRqigHnD rHbIidBu/xcmFbrHUWVkzxrLS4BadO+8BSR+/u9V12SsRldZIpeXH9dDiQxm49TRaOUP UV+V2bgYOE+YruaDs2eV0GMSqSL5Z3bJibdjM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=Gw0b/81HfJ5tL+5LyBxFbpOnUFRI9K6fakOJwgdIs4w=; b=7d+cl9kJfTCn9Zf/1qbMzjis3MGGGs3ZmvcAhaBFUoAxkgqa65iwT/28JuvI1gPwnq OMVDlEyFg9G8FGg85KRBEVjyEagsF1xNWlwQw3Ut3p7iUj1oMV2Du5H06Mrlygd/KBeo yWUrwEMZrR3IJUVMBGT5FdQ7mVyfjrlj9L1Yqvekcfc8ShHuyKZeW2zZOmkG3e32q72Y 7sxpJFC/z1xnH0LfVXtcbnfzFDUJT5N8lHR3sYg1L+2DDYe+sa4scrWrWrVkYgTOsRYK fl5UljRbmzjSfwBRKQCC1n8Cdzk4VlpuOMezdG7Qaw4gxvN37HvcyvTJHuMWWk5flupK REHA== X-Gm-Message-State: ACgBeo3MatPWsAjL+D1VhHCDvvrMXfB8Gam9pAE1U3Qnzl/yFKaGoUH+ nE6L658t1n8jHu20pA1A4z80oQ== X-Google-Smtp-Source: AA6agR7epHxme3Qu6qPXLD/c5OHjVB8E45VPdhCLrqtLAHcFdhR6bw+VOK+ulm5XxPOfDDqRx7qt0g== X-Received: by 2002:a17:902:d4d2:b0:178:491b:40d with SMTP id o18-20020a170902d4d200b00178491b040dmr3658887plg.79.1663090303562; Tue, 13 Sep 2022 10:31:43 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id c199-20020a624ed0000000b0053ea0e5556esm8145068pfb.186.2022.09.13.10.31.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Sep 2022 10:31:42 -0700 (PDT) From: Kees Cook To: linux-hardening@vger.kernel.org Cc: Kees Cook , Nathan Chancellor , David Gow , linux-kernel@vger.kernel.org Subject: [PATCH] fortify: Adjust KUnit test for modular build Date: Tue, 13 Sep 2022 10:31:36 -0700 Message-Id: <20220913173136.1926909-1-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1397; h=from:subject; bh=DVKixzI/1Uq9/WcWKrACKKNlNlq3870R18e1hHH3W/s=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBjIL538mxMOqQRTEL1TpLdBSueUkOmgI4R2uu80ed8 u7VM+fuJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYyC+dwAKCRCJcvTf3G3AJgFrD/ 43l3P5+2WCgY4LemxD7cZFJj22YwHfA7mLqBfkLnb/yOQpYk3WMvFc/x29tLsf/amlNX4E+oR871DU YCDueRMLNaNUmQo9IKyoK9kvbW3+vh5OqHBaM95S3y9FFPV3n1l/AFwwOU5b+Hq26k6bqLXM0ChGN7 qUeO5KajI4lsL6YuQfPr5wwxeB34ki63D0qiJYjJA5yKSKdko/aklacyY0Y4uNqT7FgF3RWpMSe50c AtqpuXhnvrfcC1It2EsV/ncAE4vjagxczAIMlZZHk+lkL0x22ukZZaeRm5TZQajnjBXW2xj5xsvc9s Du8SZ9l2Qlk0YVyMdXD6PvlFGvihKh6j+Bp8OaTej8ln1s2eFe7hRq0GUZaYgEoRamihHNPFvo+Wkt EzK7fy7Tnezck711uNYYinuhTX9pjvWpLGnloCTO7ph5XBdqI/s2GGMnLoOFICnVRXhci/1046+jSx P7+VJNLFnffcdHFbIb5OUZTKN6xuIY+0LRYK4BlEU9a9K7FMHPM1BfjYXvreOA9UDyw0jBAw2TdK1j 4SPRnGI5G67MRMcvaEDkkQFYX1xOYUAVvznJ7iSRHvT3nBcuCgk3Wbe2nGDD0P6/MDSDNsZ4u3boDj hZwOEBbRA6S57fZSFTBoTGw9xL58HJcq5AxwIH5r1ZHWPaM9MJWDjfWvqI1A== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" A much better "unknown size" string pointer is available directly from struct test, so use that instead of a global that isn't shared with modules. Reported-by: Nathan Chancellor Link: https://lore.kernel.org/lkml/YyCOHOchVuE/E7vS@dev-arch.thelio-3990X Fixes: 875bfd5276f3 ("fortify: Add KUnit test for FORTIFY_SOURCE internals") Cc: linux-hardening@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: David Gow --- Whoops! Thanks Nathan! :) This fixes it for your reproducer. --- lib/fortify_kunit.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/lib/fortify_kunit.c b/lib/fortify_kunit.c index 99bc0ea60d27..409af07f340a 100644 --- a/lib/fortify_kunit.c +++ b/lib/fortify_kunit.c @@ -17,7 +17,6 @@ =20 #include #include -#include =20 static const char array_of_10[] =3D "this is 10"; static const char *ptr_of_11 =3D "this is 11!"; @@ -31,7 +30,7 @@ static void known_sizes_test(struct kunit *test) =20 KUNIT_EXPECT_EQ(test, __compiletime_strlen(array_unknown), SIZE_MAX); /* Externally defined and dynamically sized string pointer: */ - KUNIT_EXPECT_EQ(test, __compiletime_strlen(saved_command_line), SIZE_MAX); + KUNIT_EXPECT_EQ(test, __compiletime_strlen(test->name), SIZE_MAX); } =20 /* This is volatile so the optimizer can't perform DCE below. */ --=20 2.34.1