From: Dan Carpenter <dan.carpenter@oracle.com>
To: Colin King <colin.king@canonical.com>,
Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Ingo Molnar <mingo@kernel.org>,
linux-efi@vger.kernel.org, kernel-janitors@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH][next] efi/tpm: fix sanity check of unsigned tbl_size being less than zero
Date: Tue, 8 Oct 2019 14:46:37 +0300 [thread overview]
Message-ID: <20191008114559.GD25098@kadam> (raw)
In-Reply-To: <20191008100153.8499-1-colin.king@canonical.com>
On Tue, Oct 08, 2019 at 11:01:53AM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> Currently the check for tbl_size being less than zero is always false
> because tbl_size is unsigned. Fix this by making it a signed int.
>
> Addresses-Coverity: ("Unsigned compared against 0")
> Fixes: e658c82be556 ("efi/tpm: Only set 'efi_tpm_final_log_size' after successful event log parsing")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/firmware/efi/tpm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/tpm.c b/drivers/firmware/efi/tpm.c
> index 703469c1ab8e..ebd7977653a8 100644
> --- a/drivers/firmware/efi/tpm.c
> +++ b/drivers/firmware/efi/tpm.c
> @@ -40,7 +40,7 @@ int __init efi_tpm_eventlog_init(void)
> {
> struct linux_efi_tpm_eventlog *log_tbl;
> struct efi_tcg2_final_events_table *final_tbl;
> - unsigned int tbl_size;
> + int tbl_size;
> int ret = 0;
Do we need to do a "ret = tbl_size;"? Currently we return success.
It's a pitty that tpm2_calc_event_log_size() returns a -1 instead of
-EINVAL.
regards,
dan carpenter
next prev parent reply other threads:[~2019-10-08 11:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-08 10:01 [PATCH][next] efi/tpm: fix sanity check of unsigned tbl_size being less than zero Colin King
2019-10-08 11:05 ` [tip: efi/urgent] efi/tpm: Fix " tip-bot2 for Colin Ian King
2019-10-08 11:46 ` Dan Carpenter [this message]
2019-10-08 16:15 ` [PATCH][next] efi/tpm: fix " Jerry Snitselaar
2019-10-08 16:24 ` Colin Ian King
2019-10-08 15:47 ` Jerry Snitselaar
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