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Commit d7c0ba40 authored by Peter Hurley's avatar Peter Hurley Committed by Greg Kroah-Hartman
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tty: audit: Early-out pty master reads earlier



Reads from pty masters are not logged; early-out before taking
locks.

Signed-off-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4a510969
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+4 −4
Original line number Diff line number Diff line
@@ -276,16 +276,16 @@ void tty_audit_add_data(struct tty_struct *tty, const void *data,
	if (unlikely(size == 0))
		return;

	if (tty->driver->type == TTY_DRIVER_TYPE_PTY
	    && tty->driver->subtype == PTY_TYPE_MASTER)
		return;

	spin_lock_irqsave(&current->sighand->siglock, flags);
	audit_log_tty_passwd = current->signal->audit_tty_log_passwd;
	spin_unlock_irqrestore(&current->sighand->siglock, flags);
	if (!audit_log_tty_passwd && icanon && !L_ECHO(tty))
		return;

	if (tty->driver->type == TTY_DRIVER_TYPE_PTY
	    && tty->driver->subtype == PTY_TYPE_MASTER)
		return;

	buf = tty_audit_buf_get(tty, icanon);
	if (!buf)
		return;