From patchwork Tue Nov 12 23:22:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dionna Amalie Glaze X-Patchwork-Id: 13873027 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 CFF2021C168 for ; Tue, 12 Nov 2024 23:23:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731453784; cv=none; b=lqkGI/T5cXlUHI8mU+6zp1XoP0pBo7vdIYHccm86GsACzPJrw6QxXke3PLDyXKji4Z1XSo1MmywAE8eEOJEYT12e56k7EOrwz165d2cQTpq/70/a8oukI30deRS7EnvcZN/LHC55Id1xcMswqXbPRWMH8xYyvZU2g+SI66ojpa4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731453784; c=relaxed/simple; bh=Jb7bsAHuq1g+F+AyFt83enXaiVLr1zlWcNhrBiuDpbE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=VqhYII684SaQayivVt+Kd/hxFXV+yONhgFGsm+mCGyzEQ/zyPWcomNjMbR11cDdt04Shg2KUK3VDDFnOHQhkC4KNckaSSgoEzBo6VqWUygGriCcWM/gZvYTyCbNQS/x6tL/XqO4N2CAkU9VS4D/WpMFuLrOyxICQXD1shzYxNxs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--dionnaglaze.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=rmASES+l; arc=none smtp.client-ip=209.85.128.202 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--dionnaglaze.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="rmASES+l" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6eae6aba72fso76317997b3.2 for ; Tue, 12 Nov 2024 15:23:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1731453782; x=1732058582; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=te/cfPXpVlK1XxYIx1bZceEtuwPH7dTOHve13FO/vjw=; b=rmASES+lxC+WgCnFnz8/QmnH0ntUO2FnMS6CPY4h3TInVDjG7gbesqSaf/BwIDWe0P c8aRFWi9qMss9AB9OxTqxy/yqUVTLNiTJj/TLd3R+XpgtHq7Y/nXD9RJefRfryFi5iBo 8d0IrY1uz7ZbkQwjemq29oRZhyvgL11myBkjnBd3bI1SYp8pM8NA8CSDe2tE0K6BrlIv fNxiSrHKdMykqIspHFbBOBycCHyfpm+D2432dwqBx9gIt6kqgEiq4OWgMMEhoAZnBrXD yKqVt8EMolCW8SGTCthyIcQ7pQsXjKz3CJFxqFYafN5IN8pCoQx6zbMKzFjzJ2VM0GOm 2uhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731453782; x=1732058582; 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=te/cfPXpVlK1XxYIx1bZceEtuwPH7dTOHve13FO/vjw=; b=ftqx0flqRQNbLaNGMVbqy+q1M0R4CDD+O17Lrf9eIRBFWA/ilm9xQc1WiyVB0O+eQi qforTOpdxpNLZyX9LbZEOEaKtYTtEtZPdywfDXY8BiOPOS/0CBvcL1qHng504uF/XQIh XCEHpdC9ebdkFapDhU71oYpQmEyc6g1YdRVBZyHxwjc72YARRClh+jYuM9C4b6ICrXvy sAWpnZyLbfSxaGJYQ+JXyvX4BX+3r+CHbPNrZzE89MNgJzrfQ6w/Hp5E7JEofN6N2qVQ yQiCWMtJSKv5ZnOA1sfLj6du1tiVEN8tCWwKHk87a4mv55uF8ECOhSu+OFwXykH0NTVw nXqQ== X-Gm-Message-State: AOJu0YxKtX+GoHfau+/gdqFV+wtj1IIchTS87Jjo5xCmcQR8xAYCVd5c LwAGDWWQS671qLRGM6PPQwamatsyYN1ahm/LLFeTmUdvvKn6Yafz+fFLQ6L7Jgp5AGq54lQ7JMe TRfHuCECd7PxD9VKTSaRp7w== X-Google-Smtp-Source: AGHT+IH0ZHDJ9RxOoA61xD1ipX9jxEyCm6JJVxkz4PucOgUVx/B+vOpDcYEieZFLPHqw48EsYNAyVJqKyr8eL5q2kw== X-Received: from dionnaglaze.c.googlers.com ([fda3:e722:ac3:cc00:36:e7b8:ac13:c9e8]) (user=dionnaglaze job=sendgmr) by 2002:a05:690c:3688:b0:6ea:fa4:a365 with SMTP id 00721157ae682-6eaddfec9efmr1445227b3.8.1731453781898; Tue, 12 Nov 2024 15:23:01 -0800 (PST) Date: Tue, 12 Nov 2024 23:22:40 +0000 In-Reply-To: <20241112232253.3379178-1-dionnaglaze@google.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241112232253.3379178-1-dionnaglaze@google.com> X-Mailer: git-send-email 2.47.0.277.g8800431eea-goog Message-ID: <20241112232253.3379178-2-dionnaglaze@google.com> Subject: [PATCH v6 1/8] KVM: SVM: Fix gctx page leak on invalid inputs From: Dionna Glaze To: linux-kernel@vger.kernel.org, x86@kernel.org, Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Brijesh Singh , Michael Roth , Ashish Kalra Cc: linux-coco@lists.linux.dev, Dionna Glaze , Tom Lendacky , John Allen , Herbert Xu , "David S. Miller" , Luis Chamberlain , Russ Weight , Danilo Krummrich , Greg Kroah-Hartman , "Rafael J. Wysocki" , Tianfei zhang , Alexey Kardashevskiy , stable@vger.kernel.org, kvm@vger.kernel.org Ensure that snp gctx page allocation is adequately deallocated on failure during snp_launch_start. Fixes: 136d8bc931c8 ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_START command") CC: Sean Christopherson CC: Paolo Bonzini CC: Thomas Gleixner CC: Ingo Molnar CC: Borislav Petkov CC: Dave Hansen CC: Ashish Kalra CC: Tom Lendacky CC: John Allen CC: Herbert Xu CC: "David S. Miller" CC: Michael Roth CC: Luis Chamberlain CC: Russ Weight CC: Danilo Krummrich CC: Greg Kroah-Hartman CC: "Rafael J. Wysocki" CC: Tianfei zhang CC: Alexey Kardashevskiy CC: stable@vger.kernel.org Signed-off-by: Dionna Glaze Acked-by: Sean Christopherson --- arch/x86/kvm/svm/sev.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index c6c8524859001..357906375ec59 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2212,10 +2212,6 @@ static int snp_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp) if (sev->snp_context) return -EINVAL; - sev->snp_context = snp_context_create(kvm, argp); - if (!sev->snp_context) - return -ENOTTY; - if (params.flags) return -EINVAL; @@ -2230,6 +2226,10 @@ static int snp_launch_start(struct kvm *kvm, struct kvm_sev_cmd *argp) if (params.policy & SNP_POLICY_MASK_SINGLE_SOCKET) return -EINVAL; + sev->snp_context = snp_context_create(kvm, argp); + if (!sev->snp_context) + return -ENOTTY; + start.gctx_paddr = __psp_pa(sev->snp_context); start.policy = params.policy; memcpy(start.gosvw, params.gosvw, sizeof(params.gosvw));