linux-kernel - Re: Regression from efi: call get_event

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]

Message-ID: <0100016206d770c7-11c5bffc-70e7-41bf-a62a-d8aad8209f7e-000000@email.amazonses.com>
Date:   Thu, 8 Mar 2018 18:20:05 +0000
From:   Jeremy Cline <jeremy@...ine.org>
To:     Thiebaud Weksteen <tweek@...gle.com>
Cc:     Javier Martinez Canillas <javierm@...hat.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        hdegoede@...hat.com, linux-efi@...r.kernel.org,
        linux-integrity@...r.kernel.org, tpmdd-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: Regression from efi: call get_event_log before ExitBootServices

On 03/08/2018 03:45 AM, Thiebaud Weksteen wrote:
> Jeremy, Hans, could you both describe precisely how your boot is
> configured? This feature is only triggered when booting the EFI stub of the
> kernel so this may be not executed if you are using something else in
> between.

I put everything I know in the other sub-thread.
> Jeremy, would you be able to modify the efi_retrieve_tpm2_eventlog_1_2
> function to add multiple efi_printk(sys_table_arg,  "message\n"); to test:
> if you get the output on your screen; and isolate which call might be the
> cause of the hang?
> I can forward a debug patch if that helps.

Thanks for the patch, here's the output:

Locating the TCG2Protocol
Calling GetEventLog on TCG2Protocol
Log returned
log_location is not empty
log_size != 0
Allocating memory for storing the logs
Returned from memory allocation
Copying log to new location

At this point it hangs.


Regards,
Jeremy