linux-kernel - Re: [PATCH] kernel: module: strncpy issue, using strlcpy instead of strncpy

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Date:	Tue, 09 Apr 2013 17:55:10 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel: module: strncpy issue, using strlcpy instead
 of strncpy

On 2013年04月09日 17:36, Chen Gang wrote:
> diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
> index 487ac6f..9ec6d1f 100644
> --- a/scripts/kallsyms.c
> +++ b/scripts/kallsyms.c
> @@ -145,13 +145,15 @@ static int read_symbol(FILE *in, struct sym_entry *s)
>  	/* include the type field in the symbol name, so that it gets
>  	 * compressed together */
>  	s->len = strlen(str) + 1;
> +	if (s->len > KSYM_NAME_LEN)
> +		s->len = KSYM_NAME_LEN;
>  	s->sym = malloc(s->len + 1);
>  	if (!s->sym) {
>  		fprintf(stderr, "kallsyms failure: "
>  			"unable to allocate required amount of memory\n");
>  		exit(EXIT_FAILURE);
>  	}
> -	strcpy((char *)s->sym + 1, str);
> +	strlcpy((char *)s->sym + 1, str, KSYM_NAME_LEN);
>  	s->sym[0] = stype;
>  

  oh... it is a user mode program which no strlcpy in lib C !!

  (so this diff is just really for a reference, not for the real using)

  :-)

-- 
Chen Gang

Asianux Corporation
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