From nobody Sun Sep 28 16:35:30 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1756568396; cv=none; d=zohomail.com; s=zohoarc; b=QjqFrZcNkzCYIuLW/pGFUox5j97S2vflqEYwF5bLuUKLTfpyDYlVxbbFmwhDQQIb3K/Wkh1C3wPIeVitl25RDTNDDz24y1OZzRpueJaGBDSQPrIL1F9D1LX4dJgsI+Y7700y/82/XSP+xNfYYQNHh2lDfNRXAf9YKTiwnTDy5VM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1756568396; h=Content-Type:Content-Transfer-Encoding:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To:Cc; bh=og6ymulh9UmaMSIescETQPevhxzm1aJMZFMSGR8zlFk=; b=LG85rqwIco3q6rTdjs+n0oDeE/lhYMqWg6d1+4QnxVPVu08Dd6vU5darGFgAUwAZeHjqV2L5MgJCTNTb+Kk13IQXT32Sv+uIQgxgL4Eiya50/ogJXTUW/KPtFSt3PVjS4XEbNlJrDpNYA0JZ5MGcWWXH3+2jziQ3mSi2YwJHvNo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1756568396335400.64326321512874; Sat, 30 Aug 2025 08:39:56 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1usNEq-0004Rf-Gb; Sat, 30 Aug 2025 11:11:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1urwy5-0008QW-33 for qemu-devel@nongnu.org; Fri, 29 Aug 2025 07:08:29 -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 1urwy2-0001gF-LH for qemu-devel@nongnu.org; Fri, 29 Aug 2025 07:08:28 -0400 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-618-dBgAec-gMnmw4UuDehncdg-1; Fri, 29 Aug 2025 07:08:21 -0400 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 79CFD195608F; Fri, 29 Aug 2025 11:08:20 +0000 (UTC) Received: from srv1.redhat.com (unknown [10.45.225.62]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id DF36A30001B5; Fri, 29 Aug 2025 11:08:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756465705; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=og6ymulh9UmaMSIescETQPevhxzm1aJMZFMSGR8zlFk=; b=D/8xktZ+uMSswme4HwcTS4OiE3ea7TAHdymLW/BJJWSSyLVH5uA/1KUyjBprf2+Bplk3jT aGgwOzsI1wRJgdLlHqIUoI02p2tyzxU93vMfGGavLD78b8fTUg83TbBvsbxN5/3Tw/nvdh u1FaU/2pWQKpGigWIzxoADhw1oB7aGk= X-MC-Unique: dBgAec-gMnmw4UuDehncdg-1 X-Mimecast-MFC-AGG-ID: dBgAec-gMnmw4UuDehncdg_1756465700 From: Kostiantyn Kostiuk To: qemu-devel@nongnu.org, Peter Maydell , Richard Henderson , Stefan Hajnoczi Subject: [PULL 1/9] qga: Fix ubsan warning Date: Fri, 29 Aug 2025 14:08:05 +0300 Message-ID: <20250829110813.50286-2-kkostiuk@redhat.com> In-Reply-To: <20250829110813.50286-1-kkostiuk@redhat.com> References: <20250829110813.50286-1-kkostiuk@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=kkostiuk@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1756568397946124100 From: Thomas Huth When compiling QEMU with --enable-ubsan there is a undefined behavior warning when running "make check": .../qga/commands-linux.c:452:15: runtime error: applying non-zero offset 5= to null pointer #0 0x55ea7b89450c in build_guest_fsinfo_for_pci_dev ..../qga/commands-linu= x.c:452:15 Fix it by avoiding the additional pointer variable here and use an "offset" integer variable instead. Signed-off-by: Thomas Huth Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Kostiantyn Kostiuk Link: https://lore.kernel.org/qemu-devel/20250730072709.27077-1-thuth@redha= t.com Signed-off-by: Kostiantyn Kostiuk --- qga/commands-linux.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/qga/commands-linux.c b/qga/commands-linux.c index 9dc0c82503..4a09ddc760 100644 --- a/qga/commands-linux.c +++ b/qga/commands-linux.c @@ -400,10 +400,10 @@ static bool build_guest_fsinfo_for_pci_dev(char const= *syspath, Error **errp) { unsigned int pci[4], host, hosts[8], tgt[3]; - int i, nhosts =3D 0, pcilen; + int i, offset, nhosts =3D 0, pcilen; GuestPCIAddress *pciaddr =3D disk->pci_controller; bool has_ata =3D false, has_host =3D false, has_tgt =3D false; - char *p, *q, *driver =3D NULL; + char *p, *driver =3D NULL; bool ret =3D false; =20 p =3D strstr(syspath, "/devices/pci"); @@ -445,13 +445,13 @@ static bool build_guest_fsinfo_for_pci_dev(char const= *syspath, =20 p =3D strstr(syspath, "/ata"); if (p) { - q =3D p + 4; + offset =3D 4; has_ata =3D true; } else { p =3D strstr(syspath, "/host"); - q =3D p + 5; + offset =3D 5; } - if (p && sscanf(q, "%u", &host) =3D=3D 1) { + if (p && sscanf(p + offset, "%u", &host) =3D=3D 1) { has_host =3D true; nhosts =3D build_hosts(syspath, p, has_ata, hosts, ARRAY_SIZE(hosts), errp); --=20 2.50.1