linux-kernel - Re: [PATCH] tpm: use kmemdup() to copy the EFI event log

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Date:   Tue, 20 Feb 2018 16:58:23 +0200
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     linux-integrity@...r.kernel.org
Cc:     Peter Huewe <peterhuewe@....de>, Jason Gunthorpe <jgg@...pe.ca>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm: use kmemdup() to copy the EFI event log

Send an updated version with corresponding change also to
tpm_eventlog_of.c

/Jarkko

On Mon, 2018-02-19 at 14:10 +0200, Jarkko Sakkinen wrote:
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> ---
>  drivers/char/tpm/tpm_eventlog_efi.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm_eventlog_efi.c
> b/drivers/char/tpm/tpm_eventlog_efi.c
> index e3f9ffd341d2..57c8b3cc46be 100644
> --- a/drivers/char/tpm/tpm_eventlog_efi.c
> +++ b/drivers/char/tpm/tpm_eventlog_efi.c
> @@ -50,10 +50,9 @@ int tpm_read_log_efi(struct tpm_chip *chip)
>  	}
>  
>  	/* malloc EventLog space */
> -	log->bios_event_log = kmalloc(log_size, GFP_KERNEL);
> +	log->bios_event_log = kmemdup(log_tbl->log, log_size,
> GFP_KERNEL);
>  	if (!log->bios_event_log)
>  		goto err_memunmap;
> -	memcpy(log->bios_event_log, log_tbl->log, log_size);
>  	log->bios_event_log_end = log->bios_event_log + log_size;
>  
>  	tpm_log_version = log_tbl->version;