From b429ea18b1c9c8953df5169c6a453b4255a6f23d Mon Sep 17 00:00:00 2001 From: Iker Pedrosa Date: Thu, 27 Feb 2020 11:48:47 +0100 Subject: [PATCH] pam_tty_audit: if kernel audit is disabled return PAM_IGNORE If kernel audit is disabled the socket open will return EPROTONOSUPPORT. Return PAM_IGNORE from pam_tty_audit and log a warning in this situation so login is not blocked by the module. --- modules/pam_tty_audit/pam_tty_audit.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/modules/pam_tty_audit/pam_tty_audit.c b/modules/pam_tty_audit/pam_tty_audit.c index 7dbcada2..589c60a2 100644 --- a/modules/pam_tty_audit/pam_tty_audit.c +++ b/modules/pam_tty_audit/pam_tty_audit.c @@ -351,6 +351,14 @@ pam_sm_open_session (pam_handle_t *pamh, int flags, int argc, const char **argv) fd = nl_open (); if (fd == -1 + && errno == EPROTONOSUPPORT) + { + pam_syslog (pamh, LOG_WARNING, "unable to open audit socket, audit not " + "supported; tty_audit skipped"); + free (old_status); + return PAM_IGNORE; + } + else if (fd == -1 || nl_send (fd, AUDIT_TTY_GET, 0, NULL, 0) != 0 || nl_recv (fd, AUDIT_TTY_GET, old_status, sizeof (*old_status)) != 0) { -- 2.25.2