From nobody Mon Feb 9 11:28:15 2026 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2B84426F29B for ; Tue, 13 Jan 2026 00:30:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768264245; cv=none; b=eLJ7kOvYJAlXy7M3hVqVovx2UJvbsu7juB4F+GjvSZV2IAeVpj+Q4Z/P0e9mxSfdji3TM42tNBhfTpYi2MJVOOxLwy6misxX4tMxpm2CWsWgdZbuClqItjnnJJjhv77TBrN2v/i2Nt7ETl9u2IOhpM+ND1fWBK4h96yXZVtleKU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768264245; c=relaxed/simple; bh=BV4yn4uZgD22pI4OXIPgJursM5Yw9qJXgqtuIVOlWXI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=iLOMIk4g9gUQPnpKbY+Kr0AIvKAYGbi+fAIOovhJfp6bmC7hgnlOEehNsKNIFHQHgoPazPc/KOskUTaLuME4VIvXGP9Si9l19raKD4hhRcIoX5GZn4uw8V50aTy9p1s5nxBJAPqXqMTGTlE0pNC4jHOEWOBECf0umn9Pq4yf9JE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jmattson.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=PlLv602+; arc=none smtp.client-ip=209.85.215.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--jmattson.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="PlLv602+" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-c551e6fe4b4so2077363a12.3 for ; Mon, 12 Jan 2026 16:30:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1768264243; x=1768869043; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=6fb2Z9AbVgMs6TJY4TZ71z6j+l7Y9Wd/VbX+6nslSBY=; b=PlLv602+j3BhfTrI5Prlo3JSwI1p4lDeRwY5QOX0hO9EO5NMHryCYxfyPQvTp3PnAA vSxR2CbhcYD7PxqJvxjoQgEMxrrujLXu5S1ifoqnCGooDoAe/ro2N1S/5PZhkgOww6Gk CAUFE0worDAJj92sjcC/he3/iK3R+DVInZdGZX2fxBCaDjSmATeXl9qswBkMgjiZdfBH lS+qNa69/f0jJQqjO2aQmEmPCwUqkFLhCKt/oS3A9qi81x2Wx4Cs7vSc/dyIjjK311D8 bHyP1KTeV1QG6aIgfFPtJNctqzvP42g95Fta17cCGKTYC2wbP1S0dYIWGjFJc9De5rOm SzxA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768264243; x=1768869043; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=6fb2Z9AbVgMs6TJY4TZ71z6j+l7Y9Wd/VbX+6nslSBY=; b=ePf2p9DoOCUZdzXeUndvvacBHBfqzg6xtgXNhOpyOXMgF70u+QU9zHC48CUpAy462F TPs0BCkmA+Ci5Ifd9QlsJWxs8O6zfbBB4VKHT6wLq3w9lrlH/C8yFOl5M+JiRAAeMaam xxQuSAQcJOFk8ZbNautOYd9Lf9BlWCS9EzFqnzt9DH6B8ajtjFrIgN99IZKkGAPCZIwg TkuV+yPqJUT8sUH3xJiaMsIa0bPGS7YDlbOk9ZJB6j6Hx7WeAS/Qa+c3K9knJmm1WqqD A64stkc/H7Xa8WjRYXDtXAmAhJ6zaRskbaFCKHfhSZ2fw1A0ISaUDqEDrblRAjlzuHni GwyQ== X-Forwarded-Encrypted: i=1; AJvYcCVFhYcO+K2b/6Y1KnkFbekFX/8GuFtGgaT9UduyUKx8PICO4e2oJY9OVko3/fXmVLOykTKLE0q8Bdjw0SE=@vger.kernel.org X-Gm-Message-State: AOJu0YwuF8vfzF0AK45JIzh5ZyTFFxy3b8fwaQXeVJ++I3MYLYKAxM94 YI+9AMG3lJpW0i/1647CSjgJG5usLb6vEGpCaMJBVcqEG9JHcxd+3974MBvZiAFoiAG2qsZDWP+ y+yrk1Er3XK/iHA== X-Google-Smtp-Source: AGHT+IEi1EtH6A0ZdyIGNglJfjm/gcYEekRFqMDdkAJ75tY+z3Sz51psYSn3Yg2rlzFiSIyo8YCI7Muvi3kfwA== X-Received: from pgdg6.prod.google.com ([2002:a05:6a02:51c6:b0:c0e:5fe1:6295]) (user=jmattson job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:99a9:b0:384:d0be:9f7c with SMTP id adf61e73a8af0-3898f9b9442mr17140251637.39.1768264243374; Mon, 12 Jan 2026 16:30:43 -0800 (PST) Date: Mon, 12 Jan 2026 16:30:00 -0800 In-Reply-To: <20260113003016.3511895-1-jmattson@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260113003016.3511895-1-jmattson@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260113003016.3511895-6-jmattson@google.com> Subject: [PATCH 05/10] KVM: x86: nSVM: Cache g_pat in vmcb_save_area_cached From: Jim Mattson To: Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Shuah Khan , Joerg Roedel , Avi Kivity , Alexander Graf , "=?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?=" , David Hildenbrand , Cathy Avery , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Jim Mattson Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The g_pat field from the vmcb12 save state area must be validated. To accommodate validation without TOCTTOU issues, add a g_pat field to the vmcb_save_area_cached struct, and include it in the fields copied by __nested_copy_vmcb_save_to_cache(). Fixes: 3d6368ef580a ("KVM: SVM: Add VMRUN handler") Signed-off-by: Jim Mattson --- arch/x86/kvm/svm/nested.c | 2 ++ arch/x86/kvm/svm/svm.h | 1 + 2 files changed, 3 insertions(+) diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 9aec836ac04c..ad9272aae908 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -506,6 +506,8 @@ static void __nested_copy_vmcb_save_to_cache(struct vmc= b_save_area_cached *to, =20 to->dr6 =3D from->dr6; to->dr7 =3D from->dr7; + + to->g_pat =3D from->g_pat; } =20 void nested_copy_vmcb_save_to_cache(struct vcpu_svm *svm, diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index 7d28a739865f..39138378531e 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -145,6 +145,7 @@ struct vmcb_save_area_cached { u64 cr0; u64 dr7; u64 dr6; + u64 g_pat; }; =20 struct vmcb_ctrl_area_cached { --=20 2.52.0.457.g6b5491de43-goog