linux-kernel - Re: [PATCH] KVM: SEV-ES: Set guest_state

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 18 Oct 2021 15:54:06 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Peter Gonda <pgonda@...gle.com>
Subject: Re: [PATCH] KVM: SEV-ES: Set guest_state_protected after VMSA update

On Fri, Oct 15, 2021, Paolo Bonzini wrote:
> From: Peter Gonda <pgonda@...gle.com>
> 
> The refactoring in commit bb18a6777465 ("KVM: SEV: Acquire
> vcpu mutex when updating VMSA") left behind the assignment to
> svm->vcpu.arch.guest_state_protected; add it back.
> 
> Signed-off-by: Peter Gonda <pgonda@...gle.com>
> [Delta between v2 and v3 of Peter's patch, which had already been
>  committed; the commit message is my own. - Paolo]
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
> ---
>  arch/x86/kvm/svm/sev.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
> index e672493b5d8d..0d21d59936e5 100644
> --- a/arch/x86/kvm/svm/sev.c
> +++ b/arch/x86/kvm/svm/sev.c
> @@ -618,7 +618,12 @@ static int __sev_launch_update_vmsa(struct kvm *kvm, struct kvm_vcpu *vcpu,
>  	vmsa.handle = to_kvm_svm(kvm)->sev_info.handle;
>  	vmsa.address = __sme_pa(svm->vmsa);
>  	vmsa.len = PAGE_SIZE;
> -	return sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_VMSA, &vmsa, error);
> +	ret = sev_issue_cmd(kvm, SEV_CMD_LAUNCH_UPDATE_VMSA, &vmsa, error);
> +	if (ret)
> +	  return ret;

Bad indentation.

> +
> +	vcpu->arch.guest_state_protected = true;
> +	return 0;
>  }
>  
>  static int sev_launch_update_vmsa(struct kvm *kvm, struct kvm_sev_cmd *argp)
> -- 
> 2.27.0
>