From patchwork Thu Dec 14 05:55:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicholas Miehlbradt X-Patchwork-Id: 1875987 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=pVMS5U4m; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=patchwork.ozlabs.org) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4SrMLN0htVz23np for ; Thu, 14 Dec 2023 17:06:36 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=pVMS5U4m; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4SrMLM5PM2z3vkg for ; Thu, 14 Dec 2023 17:06:35 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=pVMS5U4m; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com; envelope-from=nicholas@linux.ibm.com; receiver=lists.ozlabs.org) Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4SrM7P6LGYz3cWZ for ; Thu, 14 Dec 2023 16:57:05 +1100 (AEDT) Received: from pps.filterd (m0353722.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3BE4Whb3031214; Thu, 14 Dec 2023 05:56:55 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=S5PvZzwihJCEtsOMzLDq/hhL3tFxZ+GRI8sP7cCU/cE=; b=pVMS5U4msmHXiFD9YiJYHALzYOZ1nTA9EEhPrWsxn9x4KpgoIHRTR+bsnthmbFSO17X6 nsBaDVxqot4Ejq0uKbEV/yHlwL2gWOmVmmQMfqqSNJU9aI+mPIebes1DinnXWUyBxvv6 MOO2pwLkzfduveOrmbccVhouEgaimeKDxSVd5vUmKdlpD2JUqZUUNB4p9+ropC6M4aaA WqgHeVgEtn1QvVZTCVFBeYVDMfaig2ts5deA0ej3r5wdIKxiScvllfh7YNFK57zs+tiH 9Ej/sAqOzUMCNcmY//1y6iyJ1A4oxFVYtHjupzZiQDpVnSEouEYg8W/sHDDXxD238lAz rw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uyts2hk9p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Dec 2023 05:56:54 +0000 Received: from m0353722.ppops.net (m0353722.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3BE5SBmS029575; Thu, 14 Dec 2023 05:56:54 GMT Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uyts2hk39-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Dec 2023 05:56:54 +0000 Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3BE3JYZ1028220; Thu, 14 Dec 2023 05:56:26 GMT Received: from smtprelay02.fra02v.mail.ibm.com ([9.218.2.226]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3uw2xyxhmk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Dec 2023 05:56:26 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay02.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3BE5uOjJ22151732 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 14 Dec 2023 05:56:24 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 04D7B2004D; Thu, 14 Dec 2023 05:56:24 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 864E920040; Thu, 14 Dec 2023 05:56:23 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 14 Dec 2023 05:56:23 +0000 (GMT) Received: from nicholasmvm.. (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 77E0D605F3; Thu, 14 Dec 2023 16:56:19 +1100 (AEDT) From: Nicholas Miehlbradt To: glider@google.com, elver@google.com, dvyukov@google.com, akpm@linux-foundation.org, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu Subject: [PATCH 05/13] powerpc: Unpoison buffers populated by hcalls Date: Thu, 14 Dec 2023 05:55:31 +0000 Message-Id: <20231214055539.9420-6-nicholas@linux.ibm.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231214055539.9420-1-nicholas@linux.ibm.com> References: <20231214055539.9420-1-nicholas@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: oohPGHWoNwWW22yXQxLqPk3YupwgWY9n X-Proofpoint-GUID: v3dSSLQcrbP9Wpukc5CGgwUiAQvQLOIY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-14_02,2023-12-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=695 malwarescore=0 clxscore=1015 priorityscore=1501 impostorscore=0 spamscore=0 mlxscore=0 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312140035 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: iii@linux.ibm.com, linux-kernel@vger.kernel.org, Nicholas Miehlbradt , linux-mm@kvack.org, kasan-dev@googlegroups.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" plpar_hcall provides to the hypervisor a buffer where return data should be placed. The hypervisor initializes the buffers which is not visible to KMSAN so unpoison them manually. Signed-off-by: Nicholas Miehlbradt --- arch/powerpc/platforms/pseries/hvconsole.c | 2 ++ arch/powerpc/sysdev/xive/spapr.c | 3 +++ 2 files changed, 5 insertions(+) diff --git a/arch/powerpc/platforms/pseries/hvconsole.c b/arch/powerpc/platforms/pseries/hvconsole.c index 1ac52963e08b..7ad66acd5db8 100644 --- a/arch/powerpc/platforms/pseries/hvconsole.c +++ b/arch/powerpc/platforms/pseries/hvconsole.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -32,6 +33,7 @@ int hvc_get_chars(uint32_t vtermno, char *buf, int count) unsigned long *lbuf = (unsigned long *)buf; ret = plpar_hcall(H_GET_TERM_CHAR, retbuf, vtermno); + kmsan_unpoison_memory(retbuf, sizeof(retbuf)); lbuf[0] = be64_to_cpu(retbuf[1]); lbuf[1] = be64_to_cpu(retbuf[2]); diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index e45419264391..a9f48a336e4d 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -191,6 +192,8 @@ static long plpar_int_get_source_info(unsigned long flags, return rc; } + kmsan_unpoison_memory(retbuf, sizeof(retbuf)); + *src_flags = retbuf[0]; *eoi_page = retbuf[1]; *trig_page = retbuf[2];