linux-kernel - Re: [PATCH v2] sign-file: Fix confusing error messages

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Message-ID: <eb589e46-f46f-689d-72bc-1ce552cb5313@linux.alibaba.com>
Date:   Fri, 17 Jun 2022 17:24:55 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>
Cc:     David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Biggers <ebiggers@...gle.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Vitaly Chikunov <vt@...linux.org>,
        Gilad Ben-Yossef <gilad@...yossef.com>,
        Pascal van Leeuwen <pvanleeuwen@...bus.com>,
        James Morris <jmorris@...ei.org>,
        James Morris <jamorris@...ux.microsoft.com>,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] sign-file: Fix confusing error messages

Hi Jarkko,

On 6/24/21 6:48 PM, Tianjia Zhang wrote:
> When an error occurs, use errx() instead of err() to display the
> error message, because openssl has its own error record. When an
> error occurs, errno will not be changed, while err() displays the
> errno error message. It will cause confusion. For example, when
> CMS_add1_signer() fails, the following message will appear:
> 
>    sign-file: CMS_add1_signer: Success
> 
> errx() ignores errno and does not cause such issue.
> 
> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
> ---
>   scripts/sign-file.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/sign-file.c b/scripts/sign-file.c
> index fbd34b8e8f57..37d8760cb0d1 100644
> --- a/scripts/sign-file.c
> +++ b/scripts/sign-file.c
> @@ -107,7 +107,7 @@ static void drain_openssl_errors(void)
>   		bool __cond = (cond);			\
>   		display_openssl_errors(__LINE__);	\
>   		if (__cond) {				\
> -			err(1, fmt, ## __VA_ARGS__);	\
> +			errx(1, fmt, ## __VA_ARGS__);	\
>   		}					\
>   	} while(0)
>   

Likewise, No response from David, can you pick this? thanks.

Best regards,
Tianjia