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audit: log AUDIT_TTY_SET config changes

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Log transition of config changes when AUDIT_TTY_SET is called, including both
enabled and log_passwd values now in the struct.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Richard Guy Briggs 2013-11-15 11:29:02 -05:00 committed by Eric Paris
parent 04ee1a3b8f
commit a06e56b2a1
1 changed files with 26 additions and 8 deletions
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34
kernel/audit.c
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@ -989,20 +989,38 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
break; break;
} }
case AUDIT_TTY_SET: { case AUDIT_TTY_SET: {
struct audit_tty_status s; struct audit_tty_status s, old;
struct task_struct *tsk = current; struct task_struct *tsk = current;
struct audit_buffer *ab;
int res = 0;
spin_lock(&tsk->sighand->siglock);
old.enabled = tsk->signal->audit_tty;
old.log_passwd = tsk->signal->audit_tty_log_passwd;
spin_unlock(&tsk->sighand->siglock);
memset(&s, 0, sizeof(s)); memset(&s, 0, sizeof(s));
/* guard against past and future API changes */ /* guard against past and future API changes */
memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh))); memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
if ((s.enabled != 0 && s.enabled != 1) || if ((s.enabled == 0 || s.enabled == 1) &&
(s.log_passwd != 0 && s.log_passwd != 1)) (s.log_passwd == 0 || s.log_passwd == 1))
res = 1;
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
audit_log_format(ab, " op=tty_set"
" old-enabled=%d old-log_passwd=%d"
" new-enabled=%d new-log_passwd=%d"
" res=%d",
old.enabled, old.log_passwd,
s.enabled, s.log_passwd,
res);
audit_log_end(ab);
if (res) {
spin_lock(&tsk->sighand->siglock);
tsk->signal->audit_tty = s.enabled;
tsk->signal->audit_tty_log_passwd = s.log_passwd;
spin_unlock(&tsk->sighand->siglock);
} else
return -EINVAL; return -EINVAL;
spin_lock(&tsk->sighand->siglock);
tsk->signal->audit_tty = s.enabled;
tsk->signal->audit_tty_log_passwd = s.log_passwd;
spin_unlock(&tsk->sighand->siglock);
break; break;
} }
default: default: