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 36CC6C433EF for ; Fri, 8 Jul 2022 15:58:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238892AbiGHP6p (ORCPT ); Fri, 8 Jul 2022 11:58:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238880AbiGHP6n (ORCPT ); Fri, 8 Jul 2022 11:58:43 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62C6D6B253 for ; Fri, 8 Jul 2022 08:58:41 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id 145so22678184pga.12 for ; Fri, 08 Jul 2022 08:58:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=B8w4bwYuqV6DXk3ShmGJ/aTll0ynf+VvQDcahL2hqj4=; b=bfCBNAPgf5AtCFBnWe/2nrt7kg29z/w5Q01kuQ6lA+gveTZTp/emDFQxX4//qULTB1 /cK4O+t1Z+i0p4mGAfgY8TN8v0tQ0RSvxquGKJmX4QGik5uArQ6ecp3U65ZSDt8cnezy vGAyYDn3mUw1c2vTleiOPAnO9QfnpJOoCWVDhAsvcFJI8Rk2RlC4oZQdtEHG3DzFVxZP R7aHe9QHxnyRN9lRq7Va+0rjvw5ejyajU+vbEeLjLx7KjBkbz3wGUd+8NPfsVNnERiK3 WjZgiDfSHkSo40HlMmmR7c5mwZVjIi/thPN0pGgF4588q13cCYCzUgZ6bUJtMN5IYvkD 57Ng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=B8w4bwYuqV6DXk3ShmGJ/aTll0ynf+VvQDcahL2hqj4=; b=aFrwhgufk0fUDHf2s+ARIN+rxNeYLBGdOIaTrymIAJCrfmuQRArf5Iql9aIOKNJIXG hH9cNs2TRL5/uVvniDFdrSQPszcMIdMut8bJmVx4/eIjB81PNP1smwClddPDMycJV2jn rJ+5hX7U0dZp/W8bmQAPf237vHg/Cz/pgbBiBNw7nEDMFQin3zaMiy32pEO5P5KTvhlV L7ooHbnR5/AECQjPwlWUbJyeOdpxwTEOLm+Dj7XZfhHTSNH52FAEGvslGra3eLuN0vku F5spbk8+xU/dhfXthOxfuZYGMZeX8JyRxUULkeiY0LCBopCEjWO10/e+RVoJ6XB/JLPo bD9g== X-Gm-Message-State: AJIora9qOjRNWf9V7ZpqdmzW+FEzRLZdTvjDgdlHWdqCCB4lDA4Un9wt EhF6UQ/6Gw/Xnih8ZAD/2L3ZXA== X-Google-Smtp-Source: AGRyM1vTv4xL2/UTTju5PFq9Kvb5or53YEm+WZJ52+HPaHJtWg1ukrZVjJdpIkPwNcaRQPI2DCWFkQ== X-Received: by 2002:a05:6a00:188e:b0:52a:b545:559f with SMTP id x14-20020a056a00188e00b0052ab545559fmr1935105pfh.18.1657295920505; Fri, 08 Jul 2022 08:58:40 -0700 (PDT) Received: from google.com (123.65.230.35.bc.googleusercontent.com. [35.230.65.123]) by smtp.gmail.com with ESMTPSA id w23-20020a1709026f1700b00161ccdc172dsm30065208plk.300.2022.07.08.08.58.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Jul 2022 08:58:40 -0700 (PDT) Date: Fri, 8 Jul 2022 15:58:36 +0000 From: Sean Christopherson To: Vitaly Kuznetsov Cc: kvm@vger.kernel.org, Paolo Bonzini , Wanpeng Li , Jim Mattson , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] KVM: x86: Fully initialize 'struct kvm_lapic_irq' in kvm_pv_kick_cpu_op() Message-ID: References: <20220708125147.593975-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220708125147.593975-1-vkuznets@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 08, 2022, Vitaly Kuznetsov wrote: > 'vector' and 'trig_mode' fields of 'struct kvm_lapic_irq' are left > uninitialized in kvm_pv_kick_cpu_op(). While these fields are normally > not needed for APIC_DM_REMRD, they're still referenced by > __apic_accept_irq() for trace_kvm_apic_accept_irq(). Fully initialize > the structure to avoid consuming random stack memory. > > Fixes: a183b638b61c ("KVM: x86: make apic_accept_irq tracepoint more generic") > Reported-by: syzbot+d6caa905917d353f0d07@syzkaller.appspotmail.com > Signed-off-by: Vitaly Kuznetsov > --- Reviewed-by: Sean Christopherson