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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Roberto Sassu <roberto.sassu@huawei.com>
Cc: zohar@linux.ibm.com, david.safford@ge.com, monty.wiseman@ge.com,
	linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org, silviu.vlasceanu@huawei.com
Subject: Re: [PATCH v5 2/7] tpm: remove definition of TPM2_ACTIVE_PCR_BANKS
Date: Fri, 16 Nov 2018 15:38:51 +0200	[thread overview]
Message-ID: <20181116133851.GB4163@linux.intel.com> (raw)
In-Reply-To: <20181114153108.12907-3-roberto.sassu@huawei.com>

On Wed, Nov 14, 2018 at 04:31:03PM +0100, Roberto Sassu wrote:
> tcg_efi_specid_event and tcg_pcr_event2 declaration contains static arrays
> for a list of hash algorithms used for event logs and event log digests.
> 
> However, according to TCG EFI Protocol Specification, these arrays have
> variable sizes. Setting the array size to zero or 3 does not make any
> difference, because the parser has to adjust the offset depending on the
> actual array size to access structure members after the static arrays.
> 
> Thus, this patch removes the declaration of TPM2_ACTIVE_PCR_BANKS and sets
> the array size to zero.
> 
> Fixes: 4d23cc323cdb ("tpm: add securityfs support for TPM 2.0 firmware
> event log")
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
> ---
>  include/linux/tpm_eventlog.h | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/tpm_eventlog.h b/include/linux/tpm_eventlog.h
> index 20d9da77fc11..3d5d162f09cc 100644
> --- a/include/linux/tpm_eventlog.h
> +++ b/include/linux/tpm_eventlog.h
> @@ -8,7 +8,6 @@
>  #define TCG_EVENT_NAME_LEN_MAX	255
>  #define MAX_TEXT_EVENT		1000	/* Max event string length */
>  #define ACPI_TCPA_SIG		"TCPA"	/* 0x41504354 /'TCPA' */
> -#define TPM2_ACTIVE_PCR_BANKS	3
>  
>  #define EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 0x1
>  #define EFI_TCG2_EVENT_LOG_FORMAT_TCG_2   0x2
> @@ -90,7 +89,7 @@ struct tcg_efi_specid_event {
>  	u8 spec_errata;
>  	u8 uintnsize;
>  	u32 num_algs;
> -	struct tcg_efi_specid_event_algs digest_sizes[TPM2_ACTIVE_PCR_BANKS];
> +	struct tcg_efi_specid_event_algs digest_sizes[0];
>  	u8 vendor_info_size;
>  	u8 vendor_info[0];
>  } __packed;
> @@ -117,7 +116,7 @@ struct tcg_pcr_event2 {
>  	u32 pcr_idx;
>  	u32 event_type;
>  	u32 count;
> -	struct tpm2_digest digests[TPM2_ACTIVE_PCR_BANKS];
> +	struct tpm2_digest digests[0];
>  	struct tcg_event_field event;
>  } __packed;
>  
> -- 
> 2.17.1
> 

NAK for the same reason as last time.

/Jarkko

  reply	other threads:[~2018-11-16 13:38 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14 15:31 [PATCH v5 0/7] tpm: retrieve digest size of unknown algorithms from TPM Roberto Sassu
2018-11-14 15:31 ` [PATCH v5 1/7] tpm: dynamically allocate the allocated_banks array Roberto Sassu
2018-11-16 13:36   ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 2/7] tpm: remove definition of TPM2_ACTIVE_PCR_BANKS Roberto Sassu
2018-11-16 13:38   ` Jarkko Sakkinen [this message]
2018-11-28  7:50     ` Roberto Sassu
2018-11-28 12:17     ` Roberto Sassu
2018-11-29 12:04       ` Roberto Sassu
2018-11-30 19:41         ` Jarkko Sakkinen
2018-11-30 19:45           ` Jarkko Sakkinen
2018-11-30 22:18             ` Jarkko Sakkinen
2018-12-03  9:59             ` Roberto Sassu
2018-12-03 17:31               ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 3/7] tpm: rename and export tpm2_digest and tpm2_algorithms Roberto Sassu
2018-11-14 15:31 ` [PATCH v5 4/7] tpm: modify tpm_pcr_read() definition to pass a TPM hash algorithm Roberto Sassu
2018-11-16 13:41   ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 5/7] tpm: retrieve digest size of unknown algorithms with PCR read Roberto Sassu
2018-11-14 15:31 ` [PATCH v5 6/7] tpm: ensure that the output of PCR read contains the correct digest size Roberto Sassu
2018-11-16 13:41   ` Jarkko Sakkinen
2018-11-16 16:06     ` Roberto Sassu
2018-11-18  7:32       ` Jarkko Sakkinen
2018-11-19  8:14         ` Roberto Sassu
2018-11-19 14:33           ` Jarkko Sakkinen
2018-11-19 15:09             ` Roberto Sassu
2018-11-19 16:07               ` Jarkko Sakkinen
2018-11-28  8:40                 ` Roberto Sassu
2018-11-28 19:19                   ` Jarkko Sakkinen
2018-11-14 15:31 ` [PATCH v5 7/7] tpm: pass an array of tpm_bank_list structures to tpm_pcr_extend() Roberto Sassu
2018-11-16 15:03   ` Jarkko Sakkinen
2018-11-16 15:55     ` Roberto Sassu
2018-11-18  7:27       ` Jarkko Sakkinen
2018-11-19  4:57         ` Mimi Zohar
2018-11-19  8:16           ` Roberto Sassu
2018-11-19 14:33             ` Mimi Zohar
2018-11-19 14:39             ` Jarkko Sakkinen
2018-11-18  7:29       ` Jarkko Sakkinen
2018-11-19  8:22         ` Roberto Sassu
2018-11-19 14:42           ` Jarkko Sakkinen

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