Re: [PATCH v2] NFSD: Error out when getting more than one fsloc/secinfo/uuid

["J. Bruce Fields" <bfields@fieldses.org>]

On Sat, May 24, 2014 at 11:19:57AM +0800, Kinglong Mee wrote:
> v2:
> remove WARN_ON_ONCE(1) and return -EINVAL instead of ignoring it. 

Thanks, applying.--b.

> 
> Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
> ---
>  fs/nfsd/export.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
> index 7884051..13b85f9 100644
> --- a/fs/nfsd/export.c
> +++ b/fs/nfsd/export.c
> @@ -389,6 +389,10 @@ fsloc_parse(char **mesg, char *buf, struct nfsd4_fs_locations *fsloc)
>  	int len;
>  	int migrated, i, err;
>  
> +	/* more than one fsloc */
> +	if (fsloc->locations)
> +		return -EINVAL;
> +
>  	/* listsize */
>  	err = get_uint(mesg, &fsloc->locations_count);
>  	if (err)
> @@ -442,6 +446,10 @@ static int secinfo_parse(char **mesg, char *buf, struct svc_export *exp)
>  	u32 listsize;
>  	int err;
>  
> +	/* more than one secinfo */
> +	if (exp->ex_nflavors)
> +		return -EINVAL;
> +
>  	err = get_uint(mesg, &listsize);
>  	if (err)
>  		return err;
> @@ -481,6 +489,10 @@ uuid_parse(char **mesg, char *buf, unsigned char **puuid)
>  {
>  	int len;
>  
> +	/* more than one uuid */
> +	if (*puuid)
> +		return -EINVAL;
> +
>  	/* expect a 16 byte uuid encoded as \xXXXX... */
>  	len = qword_get(mesg, buf, PAGE_SIZE);
>  	if (len != EX_UUID_LEN)
> -- 
> 1.9.3
>