pam_get_user: consistently return PAM_SYSTEM_ERR if user specified a NULL pointer

pam_get_user returns PAM_SYSTEM_ERR in case of pamh == NULL.
In case of user == NULL, however, it used to return PAM_PERM_DENIED,
and in case of NULL conversation function it used to return
PAM_SERVICE_ERR.

According to the documentation, PAM_SYSTEM_ERR shall be returned
if a NULL pointer was submitted.

Fix this inconsistency and return PAM_SYSTEM_ERR in each of these
programming error cases.

* libpam/pam_item.c (pam_get_user): Return PAM_SYSTEM_ERR instead of
PAM_PERM_DENIED if user == NULL.  Return PAM_SYSTEM_ERR instead of
PAM_SERVICE_ERR if pamh->pam_conversation == NULL.

0 files changed, 0 insertions, 0 deletions