From nobody Sun Feb 8 07:07:30 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35363C6FD1C for ; Thu, 23 Mar 2023 07:47:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231221AbjCWHro (ORCPT ); Thu, 23 Mar 2023 03:47:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230483AbjCWHrl (ORCPT ); Thu, 23 Mar 2023 03:47:41 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00FD718B1B for ; Thu, 23 Mar 2023 00:47:38 -0700 (PDT) Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32N6J9I4022965; Thu, 23 Mar 2023 07:47:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=TUYXsmxji0YN0qAboJerESDzRT8zPmIKsQ4n4Ur9ibA=; b=s2PLPXT6GtkSiVlIlwHDzKJsxgfggLuCAoxZfjeQ92fwGZmF5KzZ1tE/7r7JhURVLcmF rgAIIawWsQfX+OHoHmOeq3ohvMokUR2hbPkCpKJ3Eb5sTTBSwxgnxdY/GfSM0YQgBtsi 3jUGUL4PCvaCsxLgapYCPLKAOy3yO+k403SYBccMcDnN1+J+KhLqJ+Rm8bLVQWm3J6o9 sEUEm3oEjKBezmNTWqLr2grbuu3Uu/qHIwjJ80hNd4Arn7NqGEgnbFg9DYDxrdpRad5F DMCivBmIt4a09WU/EB9JeRqwk1CwHPLF9q82mlEa2WUvehoq0YnEfFVG0aq7/5+QSHjJ 3g== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3pge77dpxd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Mar 2023 07:47:29 +0000 Received: from m0187473.ppops.net (m0187473.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 32N6g4jF029094; Thu, 23 Mar 2023 07:47:29 GMT Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3pge77dpwv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Mar 2023 07:47:29 +0000 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 32MGBhjm029417; Thu, 23 Mar 2023 07:47:27 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma06ams.nl.ibm.com (PPS) with ESMTPS id 3pd4jff16v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Mar 2023 07:47:26 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 32N7lODu23462444 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Mar 2023 07:47:24 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5B88720043; Thu, 23 Mar 2023 07:47:24 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0D10C20040; Thu, 23 Mar 2023 07:47:23 +0000 (GMT) Received: from r223l.aus.stglabs.ibm.com (unknown [9.3.109.14]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 23 Mar 2023 07:47:22 +0000 (GMT) From: Kautuk Consul To: Michael Ellerman , Nicholas Piggin , Christophe Leroy , Fabiano Rosas Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Kautuk Consul Subject: [PATCH] arch/powerpc/kvm: kvmppc_core_vcpu_create_hv: check for kzalloc failure Date: Thu, 23 Mar 2023 03:47:18 -0400 Message-Id: <20230323074718.2810914-1-kconsul@linux.vnet.ibm.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: IyPP7A4fa8iYMef587CjzLjDnLJwINAH X-Proofpoint-ORIG-GUID: DHrc5KlRSNEB_noN4oDiBoBXr4_5AQRx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-22_21,2023-03-22_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxscore=0 clxscore=1015 adultscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 mlxlogscore=999 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303230057 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" kvmppc_vcore_create() might not be able to allocate memory through kzalloc. In that case the kvm->arch.online_vcores shouldn't be incremented. Add a check for kzalloc failure and return with -ENOMEM from kvmppc_core_vcpu_create_hv(). Signed-off-by: Kautuk Consul --- arch/powerpc/kvm/book3s_hv.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 6ba68dd6190b..e29ee755c920 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -2968,13 +2968,17 @@ static int kvmppc_core_vcpu_create_hv(struct kvm_vc= pu *vcpu) pr_devel("KVM: collision on id %u", id); vcore =3D NULL; } else if (!vcore) { + vcore =3D kvmppc_vcore_create(kvm, + id & ~(kvm->arch.smt_mode - 1)); + if (unlikely(!vcore)) { + mutex_unlock(&kvm->lock); + return -ENOMEM; + } + /* * Take mmu_setup_lock for mutual exclusion * with kvmppc_update_lpcr(). */ - err =3D -ENOMEM; - vcore =3D kvmppc_vcore_create(kvm, - id & ~(kvm->arch.smt_mode - 1)); mutex_lock(&kvm->arch.mmu_setup_lock); kvm->arch.vcores[core] =3D vcore; kvm->arch.online_vcores++; --=20 2.39.2