linux-kernel - Re: [PATCH v5] crypto: ccp: Sanitize sev_platform

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

Message-ID: <1a78beb1-bd63-ca70-6b05-bff45de842e5@google.com>
Date:   Thu, 12 Jan 2023 15:59:37 -0800 (PST)
From:   David Rientjes <rientjes@...gle.com>
To:     Jarkko Sakkinen <jarkko@...fian.com>
cc:     Brijesh Singh <brijesh.singh@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        John Allen <john.allen@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5] crypto: ccp: Sanitize sev_platform_init() error
 messages

On Tue, 10 Jan 2023, Jarkko Sakkinen wrote:

> The following functions end up calling sev_platform_init() or
> __sev_platform_init_locked():
> 
> * sev_guest_init()
> * sev_ioctl_do_pek_csr
> * sev_ioctl_do_pdh_export()
> * sev_ioctl_do_pek_import()
> * sev_ioctl_do_pek_pdh_gen()
> * sev_pci_init()
> 
> However, only sev_pci_init() prints out the failed command error code, and
> even there, the error message does not specify which SEV command failed.
> 
> Address this by printing out the SEV command errors inside
> __sev_platform_init_locked(), and differentiate between DF_FLUSH, INIT and
> INIT_EX commands.  As a side-effect, @error can be removed from the
> parameter list.
> 
> This extra information is particularly useful if firmware loading and/or
> initialization is going to be made more robust, e.g. by allowing firmware
> loading to be postponed.
> 
> Signed-off-by: Jarkko Sakkinen <jarkko@...fian.com>

Acked-by: David Rientjes <rientjes@...gle.com>