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 Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 84C16C624D7 for ; Thu, 3 Sep 2026 10:36:23 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1x24nh-0002Yh-3z; Thu, 03 Sep 2026 06:36:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1x24nf-0002YX-S9 for qemu-devel@nongnu.org; Thu, 03 Sep 2026 06:36:07 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1x24ne-0005YE-EB for qemu-devel@nongnu.org; Thu, 03 Sep 2026 06:36:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1788431765; h=from:from:reply-to:subject:subject: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=oPy1ksp6gtD+A3ruB6FcDpFfwWSnhJP9CWRyvWvFk3Q=; b=EUA9f7diekeYg3O2MtIxGu0EQXjb6gl9+3TfReQhMEAVBKoVIWWRBEuj6l0LspPEM5xoa0 UgV3fvS+I+uNSIMCPXFfFl+68tthR/+U1dTSgLDGJhlXls1bM7FxGWf8Ny/Hl7uxmEiTPT 0TMDWL4iIi+9P3BiMswUSBVx9eVKCTk= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-18-V95pGhkdPHaOEgXUJh_Fig-1; Thu, 03 Sep 2026 06:36:01 -0400 X-MC-Unique: V95pGhkdPHaOEgXUJh_Fig-1 X-Mimecast-MFC-AGG-ID: V95pGhkdPHaOEgXUJh_Fig_1788431760 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 439F4195608E; Thu, 3 Sep 2026 10:36:00 +0000 (UTC) Received: from berrange.csb (headnet03.pony-001.prod.iad2.dc.redhat.com [10.2.32.114]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AB41C18005B8; Thu, 3 Sep 2026 10:35:58 +0000 (UTC) From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Pierrick Bouvier , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH 4/4] meson: warn on GCC < 12.0 due to lack of -ftrivial-auto-var-init=zero Date: Thu, 3 Sep 2026 11:35:48 +0100 Message-ID: <20260903103548.2142568-5-berrange@redhat.com> In-Reply-To: <20260903103548.2142568-1-berrange@redhat.com> References: <20260903103548.2142568-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 12 X-Spam_score: 1.2 X-Spam_bar: + X-Spam_report: (1.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The security policy for assigning CVEs has an assumption that all stack variables are zero initialized. Our CLang min version gives us -ftrivial-auto-var-init=zero, but that is only available in GCC 12 onwards. Our min GCC is 10.4 but only NetBSD has such an old version. Signed-off-by: Daniel P. Berrangé --- meson.build | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/meson.build b/meson.build index 5315420a41..eeca8d074a 100644 --- a/meson.build +++ b/meson.build @@ -327,6 +327,12 @@ endif foreach lang : all_languages compiler = meson.get_compiler(lang) if compiler.get_id() == 'gcc' and compiler.version().version_compare('>=10.4') + if not compiler.version().version_compare('>=12.0') + warning('GCC < 12.0 does not support -ftrivial-auto-var-init=zero.') + warning('This compiler will not satisfy the QEMU security policy ') + warning('for assigning CVE which is predicated on zero-initialization ') + warning('of stack variables. Update to GCC 12.0 or use CLang >= 17.0 ') + endif # ok elif compiler.get_id() == 'clang' and compiler.compiles(''' #ifdef __apple_build_version__ -- 2.55.0