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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 451FAC433F5 for ; Wed, 15 Sep 2021 04:40:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 206C061166 for ; Wed, 15 Sep 2021 04:40:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229632AbhIOEld (ORCPT ); Wed, 15 Sep 2021 00:41:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229450AbhIOElc (ORCPT ); Wed, 15 Sep 2021 00:41:32 -0400 Received: from mail-ot1-x32e.google.com (mail-ot1-x32e.google.com [IPv6:2607:f8b0:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 81127C061574; Tue, 14 Sep 2021 21:40:14 -0700 (PDT) Received: by mail-ot1-x32e.google.com with SMTP id c8-20020a9d6c88000000b00517cd06302dso1833749otr.13; Tue, 14 Sep 2021 21:40:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=vIjgnD6llWLecWS9URuZLYevsrhl82ycmqOPmbjPpGA=; b=aHCo58/7pgnyS8W/eH3M8NbQJRCTuDmU00wx/ZizM6zUGWRmvZ75gJ0bm85FQrxR3I SYMKvUNm0ap3AutIGbbvA5LgCTgm92MWXewwhtDUfeWyM2PN8P4LUEKrI8Yjo3VUDMCp wjcST5c28d87FVkQiPIETOztje0li0lV9+DsKu+9Qv3p99pzQYkPkIBuziJrcdFtX5E9 tS/kTz6z4V6+pUPlb0bTp6qutMHMvZ/tak70zvxLsNTnCWfKVbPfVOJrWT62bguZy/ni ORfvX7e/W0cWZ0APeyqPDy2IutZ1HvcGBWRCCL9mPmKlFrUVIOOf6NWjY2U1DQddon6v 00pA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :mime-version:content-transfer-encoding; bh=vIjgnD6llWLecWS9URuZLYevsrhl82ycmqOPmbjPpGA=; b=nZp68VTzghvPOcLB0wQvH62q2aPCfecvPHE0FcTkpi0qEpOXzQ9Wp6hDNhzmmIt5uK jHWR3ybCeP3BtAuWPA/T6GwpDednRw6Hq3YSkZPRfugzaPWvIaat+We4N8OTiu9VWjDV cYHSplobyn3AwV0xqMirN2ck8QFdsBs/jWRgIbgy2LDqOfK+m2OFlNGih0QEU4xJzFCp 6hUFrGJXopHGxVd8BboYmNLWixzNo2S4C8c7jV6BU+M7P/GkvUi4ksEiG97strCqMO9N JfNgl4E7TiG2fDA+MbbdlA3ATOueCp5Vdv3ItDvh9Zl7dNYawo4EOIdVWl3ssuXQxLFL R5Og== X-Gm-Message-State: AOAM5335h5gkFOdT6CbapKoqcvWeEOs8Qnsj/kZCq11/t+6zn7m7XxyP 6vtbs/FZK+dZyuENjlrphaQ= X-Google-Smtp-Source: ABdhPJwEy2wdlTzeCrHUmbGshHdzuLJsJ11MpmFsV+r4hpH9fc3sf/3Rn5evNGwSXx2+X4kvTs/jYQ== X-Received: by 2002:a05:6830:1b78:: with SMTP id d24mr17657592ote.197.1631680813695; Tue, 14 Sep 2021 21:40:13 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id r26sm3072921otn.77.2021.09.14.21.40.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Sep 2021 21:40:13 -0700 (PDT) Sender: Guenter Roeck From: Guenter Roeck To: Heiko Carstens Cc: Vasily Gorbik , Christian Borntraeger , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Guenter Roeck Subject: [PATCH] s390: Add WARN_DYNAMIC_STACK dependencies Date: Tue, 14 Sep 2021 21:40:10 -0700 Message-Id: <20210915044010.640499-1-linux@roeck-us.net> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org s390:allmodconfig fails to build with the following errors. arch/s390/kernel/syscall.c: In function '__do_syscall': arch/s390/kernel/syscall.c:168:1: error: '__do_syscall' uses dynamic stack allocation lib/test_kasan.c: In function 'kasan_alloca_oob_right': lib/test_kasan.c:782:1: error: 'kasan_alloca_oob_right' uses dynamic stack allocation lib/test_kasan.c: In function 'kasan_alloca_oob_left': lib/test_kasan.c:767:1: error: 'kasan_alloca_oob_left' uses dynamic stack allocation The first error is seen if RANDOMIZE_KSTACK_OFFSET_DEFAULT, WARN_DYNAMIC_STACK, and WERROR are enabled. The other problems are seen if KASAN_KUNIT_TEST, WARN_DYNAMIC_STACK, and WERROR are enabled. It does not make sense to abort a build in that situation. If either RANDOMIZE_KSTACK_OFFSET_DEFAULT or KASAN_KUNIT_TEST is enabled, dynamic stack allocation is on purpose and should not fail the build. Add dependencies to reflect that situation. Signed-off-by: Guenter Roeck --- arch/s390/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 2bd90c51efd3..776b730e2d15 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -688,6 +688,7 @@ config STACK_GUARD config WARN_DYNAMIC_STACK def_bool n prompt "Emit compiler warnings for function with dynamic stack usage" + depends on !WERROR || (!RANDOMIZE_KSTACK_OFFSET_DEFAULT && !KASAN_KUNIT_TEST) help This option enables the compiler option -mwarn-dynamicstack. If the compiler supports this options generates warnings for functions -- 2.33.0