linux-kernel - Re: [PATCH 2/2] tpm: do not ignore memblock

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: <3f79211f-f82c-4e41-9b40-e0abcbb4bdf0@gmail.com>
Date: Fri, 30 Aug 2024 22:33:22 +0100
From: Usama Arif <usamaarif642@...il.com>
To: Gregory Price <gourry@...rry.net>, linux-efi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, ardb@...nel.org
Subject: Re: [PATCH 2/2] tpm: do not ignore memblock_reserve return value



On 30/08/2024 09:23, Gregory Price wrote:
> tpm code currently ignores a relevant failure case silently.
> Add an error to make this failure non-silent.
> 
> Signed-off-by: Gregory Price <gourry@...rry.net>
> ---
>  drivers/firmware/efi/tpm.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/efi/tpm.c b/drivers/firmware/efi/tpm.c
> index 9c3613e6af15..b6939a6d44d9 100644
> --- a/drivers/firmware/efi/tpm.c
> +++ b/drivers/firmware/efi/tpm.c
> @@ -61,7 +61,11 @@ int __init efi_tpm_eventlog_init(void)
>  	}
>  
>  	tbl_size = sizeof(*log_tbl) + log_tbl->size;
> -	memblock_reserve(efi.tpm_log, tbl_size);
> +	if (memblock_reserve(efi.tpm_log, tbl_size)) {
> +		pr_err("TPM Event Log memblock reserve fails 0x%lx - %x\n",
> +		       efi.tpm_log, tbl_size);
> +		goto out;
> +	}
>  
>  	if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR) {
>  		pr_info("TPM Final Events table not present\n");

This was not a proper fix for the issue, sent a bit quickly!

I have sent it here https://lore.kernel.org/all/20240830212852.2794145-1-usamaarif642@gmail.com/