linux-kernel - Re: [PATCH v3 1/3] certs: log hash value on blacklist error

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Message-ID: <Y4QK2cmptp4vpRj/@kernel.org>
Date:   Mon, 28 Nov 2022 03:11:53 +0200
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Thomas Weißschuh <linux@...ssschuh.net>
Cc:     Mickaël Salaün <mic@...ikod.net>,
        David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Eric Snowberg <eric.snowberg@...cle.com>,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mark Pearson <markpearson@...ovo.com>,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v3 1/3] certs: log hash value on blacklist error

"Make blacklisted hash available in klog"

On Fri, Nov 18, 2022 at 05:03:41AM +0100, Thomas Weißschuh wrote:
> Without this information these logs are not actionable.

Without blacklisted hash?

> For example on duplicate blacklisted hashes reported by the system
> firmware users should be able to report the erroneous hashes to their
> system vendors.
> 
> While we are at it use the dedicated format string for ERR_PTR.

Lacks the beef so saying "while we are at it" makes no sense.

> Fixes: 6364d106e041 ("certs: Allow root user to append signed hashes to the blacklist keyring")

Why does this count as a bug?

> Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
> ---
>  certs/blacklist.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/certs/blacklist.c b/certs/blacklist.c
> index 41f10601cc72..6e260c4b6a19 100644
> --- a/certs/blacklist.c
> +++ b/certs/blacklist.c
> @@ -192,7 +192,7 @@ static int mark_raw_hash_blacklisted(const char *hash)
>  				   KEY_ALLOC_NOT_IN_QUOTA |
>  				   KEY_ALLOC_BUILT_IN);
>  	if (IS_ERR(key)) {
> -		pr_err("Problem blacklisting hash (%ld)\n", PTR_ERR(key));
> +		pr_err("Problem blacklisting hash %s: %pe\n", hash, key);
>  		return PTR_ERR(key);
>  	}
>  	return 0;
> -- 
> 2.38.1
> 

BR, Jarkko