Re: [PATCH] Handle NULL names better

[Steve Dickson <SteveD@redhat.com>]

On 04/30/2015 02:09 PM, Steve Dickson wrote:
> Detect when an application passes in NULL names
> and fail gracefully instead of crashing hard.
> 
> Signed-off-by: Steve Dickson <steved@redhat.com>
Committed...

steved.
> ---
>  libnfsidmap.c | 5 ++++-
>  nss.c         | 3 +++
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/libnfsidmap.c b/libnfsidmap.c
> index 833f94c..a8a9229 100644
> --- a/libnfsidmap.c
> +++ b/libnfsidmap.c
> @@ -100,8 +100,11 @@ static char * toupper_str(char *s)
>  
>  static int id_as_chars(char *name, uid_t *id)
>  {
> -	long int value = strtol(name, NULL, 10);
> +	long int value;
>  
> +	if (name == NULL)
> +		return 0;
> +	value = strtol(name, NULL, 10);
>  	if (value == 0) {
>  		/* zero value ids are valid */
>  		if (strcmp(name, "0") != 0)
> diff --git a/nss.c b/nss.c
> index f8129fe..b3fef5a 100644
> --- a/nss.c
> +++ b/nss.c
> @@ -135,6 +135,9 @@ static char *strip_domain(const char *name, const char *domain)
>  	char *l = NULL;
>  	int len;
>  
> +	if (name == NULL)
> +		goto out;
> +
>  	c = strrchr(name, '@');
>  	if (c == NULL && domain != NULL)
>  		goto out;
>