Re: [PATCH v35 24/29] LSM: Add a function to report multiple LSMs

John Johansen
2022-04-25T23:33:20Z

On 4/18/22 07:59, Casey Schaufler wrote:
> Add a new boolean function lsm_multiple_contexts() to
> identify when multiple security modules provide security
> context strings.
>
> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>

Reviewed-by: John Johansen <john.johansen@canonical.com>

> ---
> include/linux/security.h | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/include/linux/security.h b/include/linux/security.h
> index 2150016492be..3fab84220f88 100644
> --- a/include/linux/security.h
> +++ b/include/linux/security.h
> @@ -232,6 +232,15 @@ static inline bool lsmblob_equal(const struct lsmblob *bloba,
> extern int lsm_name_to_slot(char *name);
> extern const char *lsm_slot_to_name(int slot);
>
> +static inline bool lsm_multiple_contexts(void)
> +{
> +#ifdef CONFIG_SECURITY
> + return lsm_slot_to_name(1) != NULL;
> +#else
> + return false;
> +#endif
> +}
> +
> /**
> * lsmblob_value - find the first non-zero value in an lsmblob structure.
> * @blob: Pointer to the data