From mboxrd@z Thu Jan 1 00:00:00 1970 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 5FA4FC43334 for ; Wed, 20 Jul 2022 09:31:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234588AbiGTJbf (ORCPT ); Wed, 20 Jul 2022 05:31:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232919AbiGTJbZ (ORCPT ); Wed, 20 Jul 2022 05:31:25 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 427725A2C2 for ; Wed, 20 Jul 2022 02:31:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658309483; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=44BQ4IyJ/Aqy9TbnKir1Ev2RlYMwItwK5RDWRIabjHU=; b=Lj5JZJJPTzesnNIVc0mmcstB0PTGXmMM9dSlX+ds8xWPpN+EuDYkqkeSoS2XCBRMdxRufa MLvc9HGiFuC1QX+cl/IYGl3ohRUB7jHy0yGw2DnwprIjTfojiEG5p69QlI1NJ3NtLvjFMx HXIKomTaz+jdFU0BPSaoTnEwWRAIl28= Received: from mail-qv1-f71.google.com (mail-qv1-f71.google.com [209.85.219.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-621-ZJwfwTGWPnmNM5dE3PQHsA-1; Wed, 20 Jul 2022 05:31:21 -0400 X-MC-Unique: ZJwfwTGWPnmNM5dE3PQHsA-1 Received: by mail-qv1-f71.google.com with SMTP id fc20-20020ad44f34000000b00472ff2a85beso9023161qvb.4 for ; Wed, 20 Jul 2022 02:31:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=44BQ4IyJ/Aqy9TbnKir1Ev2RlYMwItwK5RDWRIabjHU=; b=VG/eyHR3SkjlsD33+58GQSHrN+sOGW7i5Zd8uvyJKtSGB0ptRPr9vIms0GjYFzWIQp nAyaff7Kwle7nCdEfpMNRnfdhfj7owPWOZ4cFrDwuFCVBClOQiilq5kq3FUYWy3g87G5 efw0My/f2RpxlHg498lt6NP/cY5L4vgBrchX99WnQy6UnXqz4NPxR0N6UltO9rbsfhgY V99Oabc+m4wSTVkizombOgqtaEUgl+792NtbvCBjWdadohnG7oN80zUPu1Op5Y9eZ+h9 mQXivSVJNhcUvppG33zxz5krOF4FB59HgJ5fQrd/Au4kfZSfSnZHaeR20OZxLgPpVqg6 5xBw== X-Gm-Message-State: AJIora/YqFtDQX2nJ38gpKRHuTnAtBt/KF0CGd9r8gYK7exQNt0wwBhx EL3NJa93+xYMkzAtp16Ac2p+O1q6rO866pthjwIdfWQ0C35XcVNyR4yFmAp1VUwh254CGJDIQaK 67Mb/beKsJnYN4Cgb0KcxzNxO X-Received: by 2002:a05:6214:27ef:b0:473:2465:c2 with SMTP id jt15-20020a05621427ef00b00473246500c2mr28478305qvb.37.1658309480789; Wed, 20 Jul 2022 02:31:20 -0700 (PDT) X-Google-Smtp-Source: AGRyM1v+B8X8QMtX2b/xtGFp+p1pM8hxjKbQxqsLoXR3e6M832KQzwNkM1/GT7Kxw2CYXadCDt72CA== X-Received: by 2002:a05:6214:27ef:b0:473:2465:c2 with SMTP id jt15-20020a05621427ef00b00473246500c2mr28478298qvb.37.1658309480604; Wed, 20 Jul 2022 02:31:20 -0700 (PDT) Received: from [10.35.4.238] (bzq-82-81-161-50.red.bezeqint.net. [82.81.161.50]) by smtp.gmail.com with ESMTPSA id bl13-20020a05620a1a8d00b006b5f8f32a8fsm4887461qkb.114.2022.07.20.02.31.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jul 2022 02:31:19 -0700 (PDT) Message-ID: <63508f39e42738d145b3534e6768a9a09c9ca37e.camel@redhat.com> Subject: Re: [PATCH 0/2] KVM: x86: never write to memory from kvm_vcpu_check_block From: Maxim Levitsky To: Paolo Bonzini , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: seanjc@google.com Date: Wed, 20 Jul 2022 12:31:17 +0300 In-Reply-To: <20220427173758.517087-1-pbonzini@redhat.com> References: <20220427173758.517087-1-pbonzini@redhat.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.40.4 (3.40.4-5.fc34) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2022-04-27 at 13:37 -0400, Paolo Bonzini wrote: > Maxim reported the following backtrace: > > [ 1355.807187]  kvm_vcpu_map+0x159/0x190 [kvm] > [ 1355.807628]  nested_svm_vmexit+0x4c/0x7f0 [kvm_amd] > [ 1355.808036]  ? kvm_vcpu_block+0x54/0xa0 [kvm] > [ 1355.808450]  svm_check_nested_events+0x97/0x390 [kvm_amd] > [ 1355.808920]  kvm_check_nested_events+0x1c/0x40 [kvm] > [ 1355.809396]  kvm_arch_vcpu_runnable+0x4e/0x190 [kvm] > [ 1355.809892]  kvm_vcpu_check_block+0x4f/0x100 [kvm] > [ 1355.811259]  kvm_vcpu_block+0x6b/0xa0 [kvm] > > due to kmap being called in non-sleepable (!TASK_RUNNING) context. > Fix it by extending kvm_x86_ops->nested_ops.hv_timer_pending and > getting rid of one annoying instance of kvm_check_nested_events. > > Paolo > Any update on this patch series? Pinging so it is not forgotten. Best regards, Maxim Levitsky