[PATCH] apparmor: fix an error code in __aa_create_ns()

[John Johansen]

On 08/02/2018 01:38 AM, Dan Carpenter wrote:
> We should return error pointers in this function.  Returning NULL
> results in a NULL dereference in the caller.
> 
> Fixes: 73688d1ed0b8 ("apparmor: refactor prepare_ns() and make usable from different views")
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> 

applied to apparmor-next


> diff --git a/security/apparmor/policy_ns.c b/security/apparmor/policy_ns.c
> index b0f9dc3f765a..1a7cec5d9cac 100644
> --- a/security/apparmor/policy_ns.c
> +++ b/security/apparmor/policy_ns.c
> @@ -255,7 +255,7 @@ static struct aa_ns *__aa_create_ns(struct aa_ns *parent, const char *name,
>  
>  	ns = alloc_ns(parent->base.hname, name);
>  	if (!ns)
> -		return NULL;
> +		return ERR_PTR(-ENOMEM);
>  	ns->level = parent->level + 1;
>  	mutex_lock_nested(&ns->lock, ns->level);
>  	error = __aafs_ns_mkdir(ns, ns_subns_dir(parent), name, dir);
>