linux-kernel - Re: [PATCH v3 4/5] efi: call get_event

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Date:   Tue, 10 Oct 2017 17:14:19 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Thiebaud Weksteen <tweek@...gle.com>, jmorris@...ei.org
Cc:     linux-efi@...r.kernel.org, linux-integrity@...r.kernel.org,
        tpmdd-devel@...ts.sourceforge.net,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        linux-kernel@...r.kernel.org, Matthew Garrett <mjg59@...gle.com>,
        peterhuewe@....de,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        tpmdd@...horst.net
Subject: Re: [PATCH v3 4/5] efi: call get_event_log before ExitBootServices

On Wed, Oct 04, 2017 at 01:12:27PM +0200, Thiebaud Weksteen wrote:
> On Wed, Oct 4, 2017 at 12:51 PM, Jarkko Sakkinen
> <jarkko.sakkinen@...ux.intel.com> wrote:
> > On Fri, Sep 29, 2017 at 08:16:17PM +0300, Jarkko Sakkinen wrote:
> >> On Tue, Sep 26, 2017 at 02:49:31PM +0200, Thiebaud Weksteen wrote:
> >> > On Tue, Sep 26, 2017 at 1:45 PM, Jarkko Sakkinen
> >> > <jarkko.sakkinen@...ux.intel.com> wrote:
> >> > > On Wed, Sep 20, 2017 at 10:13:39AM +0200, Thiebaud Weksteen wrote:
> >> > >> With TPM 2.0 specification, the event logs may only be accessible by
> >> > >> calling an EFI Boot Service. Modify the EFI stub to copy the log area to
> >> > >> a new Linux-specific EFI configuration table so it remains accessible
> >> > >> once booted.
> >> > >>
> >> > >> When calling this service, it is possible to specify the expected format
> >> > >> of the logs: TPM 1.2 (SHA1) or TPM 2.0 ("Crypto Agile"). For now, only the
> >> > >> first format is retrieved.
> >> > >>
> >> > >> Signed-off-by: Thiebaud Weksteen <tweek@...gle.com>
> >> > >
> >> > > Does not apply:
> >> > >
> >> > > Applying: tpm: move tpm_eventlog.h outside of drivers folder
> >> > > Applying: tpm: rename event log provider files
> >> > > Applying: tpm: add event log format version
> >> > > Applying: efi: call get_event_log before ExitBootServices
> >> > > error: sha1 information is lacking or useless (drivers/firmware/efi/efi.c).
> >> > > error: could not build fake ancestor
> >> > > Patch failed at 0004 efi: call get_event_log before ExitBootServices
> >> > > The copy of the patch that failed is found in: .git/rebase-apply/patch
> >> > > When you have resolved this problem, run "git am --continue".
> >> > > If you prefer to skip this patch, run "git am --skip" instead.
> >> > > To restore the original branch and stop patching, run "git am --abort".
> >> > >
> >> > > Just rebased my tree to the latest security-next.
> >> >
> >> > It applies fine on security/next-general which is more up-to-date.
> >> > (security/next does not include
> >> > ccc829ba3624beb9a703fc995d016b836d9eead8 on which this patch set is
> >> > based)
> >>
> >> Thanks, my bad, I though that I had it updated.
> >>
> >> I'll update my tree and retry.
> >>
> >> /Jarkko
> >
> > My master is up to date with security/next.
> >
> > Still get the same result:
> >
> > $ git am -3 ~/Downloads/v3-4-5-efi-call-get_event_log-before-ExitBootServices.patch
> > Applying: efi: call get_event_log before ExitBootServices
> > error: sha1 information is lacking or useless (drivers/firmware/efi/efi.c).
> > error: could not build fake ancestor
> > Patch failed at 0001 efi: call get_event_log before ExitBootServices
> > The copy of the patch that failed is found in: .git/rebase-apply/patch
> > When you have resolved this problem, run "git am --continue".
> > If you prefer to skip this patch, run "git am --skip" instead.
> > To restore the original branch and stop patching, run "git am --abort".
> >
> > Maybe you have some other trees fetched in your local GIT so that it
> > finds the ancestors? Anyway, cannot test this at this point.
> >
> > /Jarkko
> 
> The security/next branch still does not contain the commit I mentioned
> (ccc829ba3624beb9a703fc995d016b836d9eead8), which is already part of
> torvalds/master now.
> 
>  $ git branch -a --contains ccc829ba3624beb9a703fc995d016b836d9eead8
>   efi_tpm2_eventlog
>   master
>   remotes/linux-next/akpm
>   remotes/linux-next/akpm-base
>   remotes/linux-next/master
>   remotes/linux-next/stable
>   remotes/security/fixes-v4.14-rc3
>   remotes/security/fixes-v4.14-rc4
>   remotes/security/next-general
>   remotes/security/next-testing
>   remotes/torvalds/master
> 
> Is there any reason why you are trying to merge on that specific
> branch and not next-general or next-testing? Would you know the
> purpose of all these next-* branches?
> 
> Thanks,
> Thiebaud

The way I've agreed with James Morris to have my tree is to be rooted to
security trees next branch.

James, what actions should we take?

/Jarkko