From nobody Sat Nov 15 05:23:06 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=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1754647803; cv=none; d=zohomail.com; s=zohoarc; b=bAPh8eEm2qjWONlmccJlb8zikd1MqDQVECA5pqubAHWaFkHZ1dodQGIpzR1Wi16XaTEuA5xtNA0F/KfTlgKH/ofiW6Mhm0t6EfWpwLErKtj1Z4NgZyQiLX2v9sz17X460WFlUbLYCJlEiIOJub/sz9D383iXgfGec9XtVkXZh0M= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1754647803; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=FbRxD0MUnWtQmCI2DMzs9Zef7L1rf+ezjFRNnz+dSSs=; b=CKKiR7ZwwYNZWRJ4sclK4U+1bmng7yDAl9IysfG0vfivgJaENoAnNWWzZVXe2+CgrzDXAv8UC9pWxlQeb1ERM1mctlEvV78a5hb3S4pwdqsSB39V6ZaDNQelOasBHWI0TnARzjniIdeAH+snKh+UVsRCQzgv5gVY6Sj9v13ym7g= 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 1754647803919883.1729462231125; Fri, 8 Aug 2025 03:10:03 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ukK2g-0001Xf-OO; Fri, 08 Aug 2025 06:09:42 -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 1ukK2f-0001Vz-6u; Fri, 08 Aug 2025 06:09:41 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ukK2d-0006kv-7q; Fri, 08 Aug 2025 06:09:40 -0400 Received: from pps.filterd (m0356516.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5786QMTM020992; Fri, 8 Aug 2025 10:09:33 GMT Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 48bq63fcxg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Aug 2025 10:09:32 +0000 (GMT) Received: from m0356516.ppops.net (m0356516.ppops.net [127.0.0.1]) by pps.reinject (8.18.1.12/8.18.0.8) with ESMTP id 578A9Wvf030324; Fri, 8 Aug 2025 10:09:32 GMT Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 48bq63fcxd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Aug 2025 10:09:32 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 5786GHU9022682; Fri, 8 Aug 2025 10:09:31 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 48bpwqn60n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Aug 2025 10:09:31 +0000 Received: from smtpav02.fra02v.mail.ibm.com (smtpav02.fra02v.mail.ibm.com [10.20.54.101]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 578A9Qb438404452 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 8 Aug 2025 10:09:27 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1A00E20067; Fri, 8 Aug 2025 10:09:26 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5E39520063; Fri, 8 Aug 2025 10:09:24 +0000 (GMT) Received: from li-c6426e4c-27cf-11b2-a85c-95d65bc0de0e.in.ibm.com (unknown [9.204.207.58]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 8 Aug 2025 10:09:24 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:message-id:mime-version :subject:to; s=pp1; bh=FbRxD0MUnWtQmCI2DMzs9Zef7L1rf+ezjFRNnz+dS Ss=; b=oE/5O9UHD6s+PdyY1KXgM4kNGI/mS1khuUQ2sU8olkGV8mU1wqzPDManZ tPzlWQMyh6YEJymRBESRmqh1a7IYos19nTYK+KYeieDVW4Jng+JJQ4631E9k2RUz /hL8FiO4j06hnEyG0o8of7RXjAnfj6B9ZlSn0646iYUdjaZP60P0frqu1edkKhX6 C8iIbmsgmB5bRZr4oWrhYI3BZs4SSv/EqtpZ+xwq4z2q/JzFUx94fAOtwBbQXM1F dRGXO3S6iQTC/YRxkY7eNHffdq+uk3CjeFw2dXWus49PkvPB/U9PhgG4pOiRd+lo z1dfIymMsp3lD18XzT/kWb6VK6LoQ== From: Gautam Menghani To: clg@kaod.org, milesg@linux.ibm.com, npiggin@gmail.com, kowal@linux.ibm.com, ganeshgr@linux.ibm.com, harshpb@linux.ibm.com Cc: Gautam Menghani , qemu-ppc@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH] ppc/xive2: Fix integer overflow warning in xive2_redistribute() Date: Fri, 8 Aug 2025 15:39:15 +0530 Message-ID: <20250808100917.37006-1-gautam@linux.ibm.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=NInV+16g c=1 sm=1 tr=0 ts=6895ccdd cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=2OwXVqhp2XgA:10 a=VnNF1IyMAAAA:8 a=oGpWkBbS-i_JAY9sGPEA:9 X-Proofpoint-GUID: IxMeTY-7cXxvm9TRNJlwQi6YtkSX_cHh X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODA4MDA4MCBTYWx0ZWRfX7gGMLUNxq0Ev h7w5H+WHDq13Dd5VPGXzGc05ZKBi8YPgKHSZMYPJcJ4SNvT44DtCfxYkOSQ/H+VMA3JaXq/E7wo dI1hRwaeMe8YZ1waAmUMd3mzAzFeqiNb7Dw0iqhMjdxrTheLeB83BNaH4DIXb6MR8Ni24+nO6dn 6xyfCtAdcH3EKMDd86ijzN5853wYy4gAhuZmvM6bvpvqcOvIXP2IZfeJ8/L9j+/vv5L5PLj5YED Xdn/b4Jyr3r/F1HCZodGSVwjxhprrq16wMcYnDlnlySx7qLOhzASDPiWX0ic76cS21zNxetzBlG GEx8gW/pVgd//mzjygw9h1fWtZHIH2CwXP/mPUyMkFRtshdBswajqtX/z2fjSbnbijNwYIYsQlI 0u1wN2JVKKbud/XjIQJ9yffFMsWNERaOEq3qKoBnJCNRGztHEpzWSm7Dd8qnm3ls2tjs9w9Y X-Proofpoint-ORIG-GUID: tDhdzKhjdTpdhPOPMew2quC0E5o2rfnT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-08_03,2025-08-06_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 suspectscore=0 impostorscore=0 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 clxscore=1015 adultscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 spamscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508080080 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=148.163.158.5; envelope-from=gautam@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=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 @ibm.com) X-ZM-MESSAGEID: 1754647804862116600 Content-Type: text/plain; charset="utf-8" Coverity reported an integer overflow warning in xive2_redistribute() where the code does a left shift operation "0xffffffff << crowd". Fix the warning by using a 64 byte integer type. Also refactor the calculation into dedicated routines. Resolves: Coverity CID 1612608 Fixes: 555e446019f5 ("ppc/xive2: Support redistribution of group interrupts= ") Signed-off-by: Gautam Menghani Reviewed-by: Glenn Miles --- hw/intc/xive2.c | 45 +++++++++++++++++++++++++++++++-------------- 1 file changed, 31 insertions(+), 14 deletions(-) diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c index ee5fa26178..90fe9c883b 100644 --- a/hw/intc/xive2.c +++ b/hw/intc/xive2.c @@ -95,6 +95,35 @@ static void xive2_nvgc_set_backlog(Xive2Nvgc *nvgc, uint= 8_t priority, } } =20 +static inline uint32_t xive2_nvgc_get_idx(uint32_t nvp_idx, uint8_t group) +{ + uint32_t nvgc_idx; + + if (group > 0) { + nvgc_idx =3D (nvp_idx & (0xffffffffULL << group)) | + ((1 << (group - 1)) - 1); + } else { + nvgc_idx =3D nvp_idx; + } + + return nvgc_idx; +} + +static inline uint8_t xive2_nvgc_get_blk(uint8_t nvp_blk, uint8_t crowd) +{ + uint8_t nvgc_blk; + + if (crowd > 0) { + crowd =3D (crowd =3D=3D 3) ? 4 : crowd; + nvgc_blk =3D (nvp_blk & (0xffffffffULL << crowd)) | + ((1 << (crowd - 1)) - 1); + } else { + nvgc_blk =3D nvp_blk; + } + + return nvgc_blk; +} + uint64_t xive2_presenter_nvgc_backlog_op(XivePresenter *xptr, bool crowd, uint8_t blk, uint32_t idx, @@ -638,20 +667,8 @@ static void xive2_redistribute(Xive2Router *xrtr, Xive= TCTX *tctx, uint8_t ring) =20 trace_xive_redistribute(tctx->cs->cpu_index, ring, nvp_blk, nvp_idx); /* convert crowd/group to blk/idx */ - if (group > 0) { - nvgc_idx =3D (nvp_idx & (0xffffffff << group)) | - ((1 << (group - 1)) - 1); - } else { - nvgc_idx =3D nvp_idx; - } - - if (crowd > 0) { - crowd =3D (crowd =3D=3D 3) ? 4 : crowd; - nvgc_blk =3D (nvp_blk & (0xffffffff << crowd)) | - ((1 << (crowd - 1)) - 1); - } else { - nvgc_blk =3D nvp_blk; - } + nvgc_idx =3D xive2_nvgc_get_idx(nvp_idx, group); + nvgc_blk =3D xive2_nvgc_get_blk(nvp_blk, crowd); =20 /* Use blk/idx to retrieve the NVGC */ if (xive2_router_get_nvgc(xrtr, crowd, nvgc_blk, nvgc_idx, &nvgc)) { --=20 2.50.1