From nobody Thu Apr 2 00:13:27 2026 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=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1772750769; cv=none; d=zohomail.com; s=zohoarc; b=BxBUuod4xzacje8rmEc76+Sm2HJei17E5z6sup8NDIKAlXEXDw/Bal7osg1QXOMZC6UlpNmARwU8AfS3b65mv+wX+G0jnuV8GaTRCnbxsP+cUoQmOFocWPqs1umauBA0IMpHWGhMONpoEHV62LUoGWQRWIZio9m+3FTkejk1vm4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1772750769; h=Content-Transfer-Encoding:Cc:Cc: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; bh=7BibOTBwTdwZqCXi9LlSG0HpdUL4Nqdxj1fRa54T7zc=; b=kC9HPbQxBcmwHt6E04stZgiQCH15n/j0FiTZP6OP79ZhCovZIyG8z5n9T0RQncK2+cQzogE6pUCfeDUxHwAravTguvf8KCpQbyH957oodWnNsHxk2+wwJ0aeatYrZCYMaV3d6sHLihJByMs9ja/jc5H1dYLQn1DhWGP3gjIiYgE= 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=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1772750769861147.62655104325393; Thu, 5 Mar 2026 14:46:09 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vyHOn-0001HH-1u; Thu, 05 Mar 2026 17:42:29 -0500 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 1vyHOl-0001Fc-Ab; Thu, 05 Mar 2026 17:42:27 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vyHOj-000792-LU; Thu, 05 Mar 2026 17:42:27 -0500 Received: from pps.filterd (m0360083.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 625IapKN2517891; Thu, 5 Mar 2026 22:42:21 GMT Received: from ppma11.dal12v.mail.ibm.com (db.9e.1632.ip4.static.sl-reverse.com [50.22.158.219]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4cksrje0ps-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 05 Mar 2026 22:42:21 +0000 (GMT) Received: from pps.filterd (ppma11.dal12v.mail.ibm.com [127.0.0.1]) by ppma11.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 625JCudM008803; Thu, 5 Mar 2026 22:42:20 GMT Received: from smtprelay04.dal12v.mail.ibm.com ([172.16.1.6]) by ppma11.dal12v.mail.ibm.com (PPS) with ESMTPS id 4cmdd1n3st-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 05 Mar 2026 22:42:20 +0000 Received: from smtpav01.dal12v.mail.ibm.com (smtpav01.dal12v.mail.ibm.com [10.241.53.100]) by smtprelay04.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 625MgJDs32113228 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 5 Mar 2026 22:42:19 GMT Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 46EBB58057; Thu, 5 Mar 2026 22:42:19 +0000 (GMT) Received: from smtpav01.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1531C58059; Thu, 5 Mar 2026 22:42:18 +0000 (GMT) Received: from fedora-workstation.ibmuc.com (unknown [9.61.36.214]) by smtpav01.dal12v.mail.ibm.com (Postfix) with ESMTP; Thu, 5 Mar 2026 22:42:17 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=7BibOTBwTdwZqCXi9 LlSG0HpdUL4Nqdxj1fRa54T7zc=; b=C9ZX8vOBPItnEPTSWqq+vy8/BXrfpeltk 1fp05DFIuEX7ak6Z0TJzaaL0AGhy9VPs0noIQHlONGIAkllQjV4zDao4NuqcAK0Y Z8exR1ijwIrBWXG2C40fgh8CQjbDntYPQXFq/y4tWEbuzd6c1xgCfH2LWvn/+p+P 5ibh+EL/McKxwGtH9mUKgpoBVYz2FAzqyv2mOXP/ZG8JBu2EAjmnz1J2Lcg05B+Q l4gkjvIlGaKQQKbrb1UKFCYz0Tkv6QYTFR9oPY7ISKawJHy5+1TKMZl8Eq7lM0Yj DmpLdFRWJGgpbmBDtawbDkx3lZOIvbba3Va0pC4f8k0enRqWQ0/7g== From: Zhuoying Cai To: thuth@redhat.com, berrange@redhat.com, jrossi@linux.ibm.com, qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, pierrick.bouvier@linaro.org, david@kernel.org, walling@linux.ibm.com, jjherne@linux.ibm.com, pasic@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com, mjrosato@linux.ibm.com, iii@linux.ibm.com, eblake@redhat.com, armbru@redhat.com, zycai@linux.ibm.com, alifm@linux.ibm.com, brueckner@linux.ibm.com, jdaley@linux.ibm.com Subject: [PATCH v9 20/30] pc-bios/s390-ccw: Add signed component address overlap checks Date: Thu, 5 Mar 2026 17:41:35 -0500 Message-ID: <20260305224146.664053-21-zycai@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260305224146.664053-1-zycai@linux.ibm.com> References: <20260305224146.664053-1-zycai@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=Rp/I7SmK c=1 sm=1 tr=0 ts=69aa06cd cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=qRwRlr6pIYMFea3-13gA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA1MDE5NCBTYWx0ZWRfXxVw6mM+AjjUi hbBifduEsgrKfiE3fa0mO8t5yzlVgd8zlhfVmjl29rmv9dPTtPQwDxocNG5LrqvHrBAx00xyLtU +SjGSzcZynquJUG1+r4aVSYF8WGR3o70OviTnUrGZ8U2Zq3s1px8ul/MnO/cFSqsmfL8EOTYS+F NEDqugAJBOJBxdlNVy/zpMxpfLQ5jYDBRlG6JpC7lM1XfJKaM5Y1KSyDYO9sm7bqvlJZB820H0c WOEM18qCS8RWRhmoSp7u8fSzlcNgaCqo16eFK7Sxa6brz2GsS40wgxg5GvCUCfTmovjfTr1lFaU O9nVzDJsdLr0/HTNkFAYhfEAGGAfXUFEL2G5Mrw5lyMjK5UfdpejHswunHKhPJo89z7g0/58/G3 3X/jfd794T9+dJQZkgDonKxdCWV2IYewwxabMT4KEAnX31QcmChxlUGObi9gdn4jUe24nk8qFzf KpXn/wLU/wSmSivPUYg== X-Proofpoint-GUID: rR-_Es05I04tJW0ADJ_uYUgzl5Qljj22 X-Proofpoint-ORIG-GUID: rR-_Es05I04tJW0ADJ_uYUgzl5Qljj22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-05_06,2026-03-04_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 spamscore=0 phishscore=0 adultscore=0 bulkscore=0 clxscore=1015 impostorscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603050194 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=148.163.156.1; envelope-from=zycai@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -11 X-Spam_score: -1.2 X-Spam_bar: - X-Spam_report: (-1.2 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.892, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.622, SPF_HELO_NONE=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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1772750771835154100 Content-Type: text/plain; charset="utf-8" Add address range tracking and overlap checks to ensure that no component overlaps with a signed component during secure IPL. Signed-off-by: Zhuoying Cai --- pc-bios/s390-ccw/secure-ipl.c | 52 +++++++++++++++++++++++++++++++++++ pc-bios/s390-ccw/secure-ipl.h | 6 ++++ 2 files changed, 58 insertions(+) diff --git a/pc-bios/s390-ccw/secure-ipl.c b/pc-bios/s390-ccw/secure-ipl.c index 8d281c1cea..68596491c5 100644 --- a/pc-bios/s390-ccw/secure-ipl.c +++ b/pc-bios/s390-ccw/secure-ipl.c @@ -211,6 +211,53 @@ static void init_lists(IplDeviceComponentList *comp_li= st, cert_list->ipl_info_header.len =3D sizeof(cert_list->ipl_info_header); } =20 +static bool is_comp_overlap(SecureIplCompAddrRange *comp_addr_range, + int addr_range_index, + uint64_t start_addr, uint64_t end_addr) +{ + /* neither a signed nor an unsigned component can overlap with a signe= d component */ + for (int i =3D 0; i < addr_range_index; i++) { + if ((comp_addr_range[i].start_addr < end_addr && + start_addr < comp_addr_range[i].end_addr) && + comp_addr_range[i].is_signed) { + return true; + } + } + + return false; +} + +static void comp_addr_range_add(SecureIplCompAddrRange *comp_addr_range, + int addr_range_index, bool is_signed, + uint64_t start_addr, uint64_t end_addr) +{ + if (addr_range_index >=3D MAX_CERTIFICATES) { + zipl_secure_handle("Component address range update failed due to o= ut-of-range" + " index; Overlapping validation cannot be guara= nteed"); + } + + comp_addr_range[addr_range_index].is_signed =3D is_signed; + comp_addr_range[addr_range_index].start_addr =3D start_addr; + comp_addr_range[addr_range_index].end_addr =3D end_addr; +} + +static void addr_overlap_check(SecureIplCompAddrRange *comp_addr_range, + int *addr_range_index, + uint64_t start_addr, uint64_t end_addr, boo= l is_signed) +{ + bool overlap; + + overlap =3D is_comp_overlap(comp_addr_range, *addr_range_index, + start_addr, end_addr); + if (overlap) { + zipl_secure_handle("Component addresses overlap"); + } + + comp_addr_range_add(comp_addr_range, *addr_range_index, is_signed, + start_addr, end_addr); + *addr_range_index +=3D 1; +} + static int zipl_load_signature(ComponentEntry *entry, uint64_t sig_sec) { if (zipl_load_segment(entry, sig_sec) < 0) { @@ -254,6 +301,8 @@ int zipl_run_secure(ComponentEntry **entry_ptr, uint8_t= *tmp_sec) * exists for the certificate). */ int cert_list_table[MAX_CERTIFICATES] =3D { [0 ... MAX_CERTIFICATES - = 1] =3D -1 }; + SecureIplCompAddrRange comp_addr_range[MAX_CERTIFICATES]; + int addr_range_index =3D 0; int signed_count =3D 0; =20 if (!secure_ipl_supported()) { @@ -283,6 +332,9 @@ int zipl_run_secure(ComponentEntry **entry_ptr, uint8_t= *tmp_sec) goto out; } =20 + addr_overlap_check(comp_addr_range, &addr_range_index, + comp_addr, comp_addr + comp_len, sig_len > = 0); + if (!sig_len) { break; } diff --git a/pc-bios/s390-ccw/secure-ipl.h b/pc-bios/s390-ccw/secure-ipl.h index eb5ba0ed47..69edfce241 100644 --- a/pc-bios/s390-ccw/secure-ipl.h +++ b/pc-bios/s390-ccw/secure-ipl.h @@ -16,6 +16,12 @@ VCStorageSizeBlock *zipl_secure_get_vcssb(void); int zipl_run_secure(ComponentEntry **entry_ptr, uint8_t *tmp_sec); =20 +typedef struct SecureIplCompAddrRange { + bool is_signed; + uint64_t start_addr; + uint64_t end_addr; +} SecureIplCompAddrRange; + static inline void zipl_secure_handle(const char *message) { switch (boot_mode) { --=20 2.53.0