linux-kernel - Re: [PATCH 1/1] UBSAN: use uppercase K to format a kernel pointer

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Date:	Fri, 29 Jul 2016 16:07:36 +0300
From:	Andrey Ryabinin <aryabinin@...tuozzo.com>
To:	Nicolas Iooss <nicolas.iooss_linux@....org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] UBSAN: use uppercase K to format a kernel pointer

On 07/29/2016 02:10 PM, Nicolas Iooss wrote:
> handle_object_size_mismatch() used %pk to format a kernel pointer in
> pr_err().  This seems to be a misspelling for %pK.
> 
> Fixes: c6d308534aef ("UBSAN: run-time undefined behavior sanity checker")
> Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@....org>
> ---
>  lib/ubsan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/ubsan.c b/lib/ubsan.c
> index 8799ae5e2e42..d57d1e7e98a3 100644
> --- a/lib/ubsan.c
> +++ b/lib/ubsan.c
> @@ -308,7 +308,7 @@ static void handle_object_size_mismatch(struct type_mismatch_data *data,
>  		return;
>  
>  	ubsan_prologue(&data->location, &flags);
> -	pr_err("%s address %pk with insufficient space\n",
> +	pr_err("%s address %pK with insufficient space\n",

I don't see much sense in using %pK here. It should be fine to use just '%p' here as we already use it in handle_missaligned_access().

>  		type_check_kinds[data->type_check_kind],
>  		(void *) ptr);
>  	pr_err("for an object of type %s\n", data->type->type_name);
>