linux-kernel - Re: [PATCH] fs_parse: Remove pr_notice() about each validation

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Date:   Wed, 11 Mar 2020 18:03:26 +0000
From:   Seth Arnold <seth.arnold@...onical.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs_parse: Remove pr_notice() about each validation

On Fri, Mar 06, 2020 at 04:20:02PM -0800, Kees Cook wrote:
> This notice fills my boot logs with scary-looking asterisks but doesn't
> really tell me anything. Let's just remove it; validation errors
> are already reported separately, so this is just a redundant list of
> filesystems.
> 
> $ dmesg | grep VALIDATE
> [    0.306256] *** VALIDATE tmpfs ***
> [    0.307422] *** VALIDATE proc ***
> [    0.308355] *** VALIDATE cgroup ***
> [    0.308741] *** VALIDATE cgroup2 ***
> [    0.813256] *** VALIDATE bpf ***
> [    0.815272] *** VALIDATE ramfs ***
> [    0.815665] *** VALIDATE hugetlbfs ***
> [    0.876970] *** VALIDATE nfs ***
> [    0.877383] *** VALIDATE nfs4 ***
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>

Excellent, these messages haven't been useful in helping users diagnose
problems and they look quite noisy considering how mundane they are.

Reviewed-by: Seth Arnold <seth.arnold@...onical.com>

Thanks

> ---
>  fs/fs_parser.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/fs/fs_parser.c b/fs/fs_parser.c
> index 7e6fb43f9541..ab53e42a874a 100644
> --- a/fs/fs_parser.c
> +++ b/fs/fs_parser.c
> @@ -368,8 +368,6 @@ bool fs_validate_description(const char *name,
>  	const struct fs_parameter_spec *param, *p2;
>  	bool good = true;
>  
> -	pr_notice("*** VALIDATE %s ***\n", name);
> -
>  	for (param = desc; param->name; param++) {
>  		/* Check for duplicate parameter names */
>  		for (p2 = desc; p2 < param; p2++) {
> -- 
> 2.20.1
> 
> 
> -- 
> Kees Cook