ksmbd: fix NULL pointer dereference in session_user_name() and session_account_type()

session_user_name() and session_account_type() dereference
session->user without checking for NULL. A session can be published
and exposed via the procfs session interface before authentication
completes, during which session->user is NULL:

  show_proc_session() -> session_user_name(sess)
    -> user_guest(session->user) -> NULL->flags -> oops

Guard both functions by treating a NULL session->user as an explicit
not-yet-authenticated state rather than dereferencing it.

Fixes: 1f7dd03a88a8 ("ksmbd: fix malformed procfs status output")
Cc: stable@vger.kernel.org
Signed-off-by: Jack Blessed Kimani <jackblessed191@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

0 files changed, 0 insertions, 0 deletions