linux-kernel - Re: [PATCH v9 01/27] kallsyms: use `sizeof` instead of hardcoded size

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Date:   Sat, 6 Aug 2022 01:40:33 +0300
From:   Konstantin Shelekhin <k.shelekhin@...ro.com>
To:     <ojeda@...nel.org>
CC:     <boqun.feng@...il.com>, <gregkh@...uxfoundation.org>,
        <jarkko@...nel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <patches@...ts.linux.dev>,
        <rust-for-linux@...r.kernel.org>, <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v9 01/27] kallsyms: use `sizeof` instead of hardcoded size

> diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
> index f18e6dfc68c5..52f5488c61bc 100644
> --- a/scripts/kallsyms.c
> +++ b/scripts/kallsyms.c
> @@ -206,7 +206,7 @@ static struct sym_entry *read_symbol(FILE *in)
>  
>  	rc = fscanf(in, "%llx %c %499s\n", &addr, &type, name);
>  	if (rc != 3) {
> -		if (rc != EOF && fgets(name, 500, in) == NULL)
> +		if (rc != EOF && fgets(name, sizeof(name), in) == NULL)
>  			fprintf(stderr, "Read error or end of file.\n");
>  		return NULL;
>  	}

Might be another nit, but IMO it's better to use ARRAY_SIZE() here.