[RESEND][PATCH 01/15] tty: audit: Early-out pty master reads earlier

From: Peter Hurley
Date: Sun Jan 10 2016 - 00:00:16 EST


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

Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
drivers/tty/tty_audit.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index 3d245cd..ead924e 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -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;
--
2.7.0